Java program to find greatest number in array

Java program to find greatest number in array:

package arraydemo;


public class ArrayDemo {

    
    public static void main(String[] args) {
        
        
                
                int numbers[] = new int[]{11,12,13,44,55,66,77,88,99,23};
               
                
                int small = numbers[0];
                int large = numbers[0];
               
                for(int i=1; i< numbers.length; i++)
                {
                        if(numbers[i] > large)
                                large = numbers[i];
                        else if (numbers[i] < small)
                                small = numbers[i];
                       
                }
               
                System.out.println("Largest Number is : " + large);
                System.out.println("Smallest Number is : " + small);
        }
}
OUTPUT:
Largest Number is : 99

Smallest Number is : 11

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Simple Java Program to calculate Restaurant Bill

 Simple Java Program to calculate Restaurant Bill:

package restaurants;

import java.util.Scanner;


public class Restaurants {

    
    public static void main(String[] args) {
        
        Scanner input = new Scanner(System.in);
        boolean quit= false;
        int sum=0;
        int wine=200,cold=20,bear=400,juice=100;
        String order="";
        
        do{
            System.out.println("ITEM"+"\t\tPrice");
            System.out.println("1.Wine"+"\t\t"+"200");
            System.out.println("2.ColdDrink"+"\t"+"20");
            System.out.println("3.Bear"+"\t\t"+"400");
            System.out.println("4.Juice"+"\t\t"+"100");
            System.out.println("5.Quit");
            
            int choice=input.nextInt();
            
            switch(choice){
                case 1:System.out.println("Wine"+"\n");
                        sum=sum+wine;
                        order=order.concat("wine"+"\n");
                        
                    break;
                case 2:
                    System.out.println("ColdDrink");
                    sum=sum+cold;
                    order=order.concat("ColdDrink"+"\n");
                    
                       break;
                case 3:
                    System.out.println("Bear");
                    sum=sum+bear;
                    order=order.concat("Bear"+"\n");
                      break;
                case 4:
                    System.out.println("Juice");
                    sum=sum+juice;
                    order=order.concat("Juice"+"\n");
                    break;
                case 5:
                     quit=true;
                     
                    break;
                default:
                    System.out.println("Wrong input");
            }
        
        }while(!quit);
       
        System.out.println("Your Orders are:\n"+order);
        System.out.println("Your total bill="+sum);
        
         System.out.println("Thank you");
    
        
        
        
    
    }
    
}

OUTPUT:

ITEM Price
1.Wine 200
2.ColdDrink 20
3.Bear 400
4.Juice 100
5.Quit
1
Wine

ITEM Price
1.Wine 200
2.ColdDrink 20
3.Bear 400
4.Juice 100
5.Quit
2
ColdDrink
ITEM Price
1.Wine 200
2.ColdDrink 20
3.Bear 400
4.Juice 100
5.Quit
3
Bear
ITEM Price
1.Wine 200
2.ColdDrink 20
3.Bear 400
4.Juice 100
5.Quit
4
Juice
ITEM Price
1.Wine 200
2.ColdDrink 20
3.Bear 400
4.Juice 100
5.Quit
5
Your Orders are:
wine
ColdDrink
Bear
Juice

Your total bill=720
Thank you

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Java KingKong Program

Java KingKong Program:

package javaapplication16;

public class KingKongDemo {

    public static void main(String[] args) {

        for(int i=1;i<=50;i++){

        

            if(i%3==0){

                System.out.println(i+"King");

            }

            else if(i%5==0){

                System.out.println(i+"kong");

            }

            else if(i%3==0 && i%5==0){

                System.out.println("KingKong");

            }else{

                System.out.println(i);

            }

        }

    }

}

OUTPUT:

1

2

3King

4

5kong

6King

7

8

9King

10kong

11

12King

13

14

15King

16

17

18King

19

20kong

21King

22

23

24King

25kong

26

27King

28

29

30King

31

32

33King

34

35kong

36King

37

38

39King

40kong

41

42King

43

44

45King

46

47

48King

49

50kong

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Relational Operator

Relational Operator:

Operators                             Result

==                                          Equql to

!=                                           Not Equal to

>                                            Greater Than

<                                             Lesser than

>=                                           Greater than or equal to

<=                                           Lesser than or equal to  

package javaapplication16;

public class RelationalOperatorDemo {

    public static void main(String[] args) {

        int a=1;

        int b=2;

        int c=1;

        if(a==c){

            System.out.println(" a is Equal to c"+a);

        }else{

            System.out.println("a is not equal to c");

        }

        

        if(a!=b){

            System.out.println("a is Not Equal to b");

        }

        

        if(a>b){

            System.out.println("a is greater than b");

        }

           if(a<b){

               System.out.println("a is less than b");

           }  

           

           if(a>=b){

               System.out.println("a is greater or eual to b");

           }else{

            System.out.println("a is  not greater or eual to b");

           }

           

           if(a<=b){

               System.out.println("a is greater or equal to b");

           }else{

           System.out.println("a is not greater or equal to b");

           }

    }

}

Output:

 a is Equal to c1

a is Not Equal to b

a is less than b

a is  not greater or eual to b

a is greater or equal to b

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Arithmetic Operators

Arithmetic Operators:

package javaapplication16;


public class ArithemiticOperatorDemo {
    public static void main(String[] args) {
        int a=10;
        int b=5;
        
        int c=a+b;
        int d=a/b;
        int e=a*b;
        int f=a%b;
        
        System.out.println("Arithmetic Operator Operation");
        System.out.println("Addition = "+a);
        System.out.println("Division = "+b);
        System.out.println("Multiplification = "+e);
        System.out.println("Modulus = "+f);
    }
}

OUTPUT:

Arithmetic Operator Operation

Addition = 10

Division = 5

Multiplification = 50

Modulus = 0

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Increment And Decrement Operator

Increment and Decrement Operator:

package javaapplication16;


public class IncrementAndDecrementOPeratorDemo {
    public static void main(String[] args) {
        int a=5;
        int b=3;
        int c;
        int d;
        
        c= ++b;
        d=++a;
        c++;
        
        System.out.println("a = "+a);
        System.out.println("b = "+b);
        System.out.println("c = "+c);
        System.out.println("d= "+d);
    }
}

OUTPUT:

a = 6

b = 4

c = 5

d= 6

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Java Program to add two Matrix

Java Program to add two Matrix:

package javaapplication22;

import java.util.Scanner;

public class AddTwoMatrix {

    public static void main(String[] args) {

       Scanner s = new Scanner(System.in);

       System.out.print("Enter number of rows: ");

       int rows = s.nextInt();

       System.out.print("Enter number of columns: ");

       int cols = s.nextInt();

       int[][] a = new int[rows][cols];

       int[][] b = new int[rows][cols];

       System.out.println("Enter the first matrix");

       for (int i = 0; i < rows; i++) {

           for (int j = 0; j < cols; j++) {

               a[i][j] = s.nextInt();

           }

       }

       System.out.println("Enter the second matrix");

       for (int i = 0; i < rows; i++) {

           for (int j = 0; j < cols; j++) {

               b[i][j] = s.nextInt();

           }

       }

       int[][] c = new int[rows][cols];

       for (int i = 0; i < rows; i++) {

           for (int j = 0; j < cols; j++) {

               c[i][j] = a[i][j] + b[i][j];

           }

       }

       System.out.println("The sum of the two matrices =");

       for (int i = 0; i < rows; i++) {

           for (int j = 0; j < cols; j++) {

               System.out.print(c[i][j] + " ");

           }

           System.out.println();

       }

   }

}

Output:

Enter number of rows: 2

Enter number of columns: 2

Enter the first matrix

1 2

3 4

Enter the second matrix

1 4

3 5

The sum of the two matrices =

2 6 

6 9 

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Java BizzBuzz Program

Java BizzBuzz Program:

package javaapplication22;


public class BizzBuzzDemo {
   
    public static void main(String[] args) {
        for(int i=1;i<=50;i++){
            if(i%3==0){
                System.out.println("Bizz"+i);
            }else if(i%5==0){
                System.out.println("Buzz"+i);
            }else if(i%3==0 && i%5==0){
                System.out.println("BizzBuzz"+i);
            }else{
                System.out.println(i);
            }
       
        }
    }
}

OUTPUT:

1

2

Bizz3

4

Buzz5

Bizz6

7

8

Bizz9

Buzz10

11

Bizz12

13

14

Bizz15

16

17

Bizz18

19

Buzz20

Bizz21

22

23

Bizz24

Buzz25

26

Bizz27

28

29

Bizz30

31

32

Bizz33

34

Buzz35

Bizz36

37

38

Bizz39

Buzz40

41

Bizz42

43

44

Bizz45

46

47

Bizz48

49

Buzz50

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IndexOf() and last indexOf()

Searching Strings:

1)IndexOf() = searches for the first occur of a character 
                           int indexOf(int ch);

2)last indexOf()=searches for the last occur of a character 

                              int lastIndexOf(int ch);

package stringdemo;

public class IndexOfAndlastIndexOfDemo {

    

    public static void main(String[] args) {

        String s="I am a bad guy";

        

        System.out.println(s);

        System.out.println("indexOf(a)"+s.indexOf('a'));

        System.out.println("lastindexOf(g)"+s.lastIndexOf('a'));

    }

    

}

Output:

I am a bad guy

indexOf(a)2

lastindexOf(g)8

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length() and capacity() method

StringBuffer:

length() and capacity()

The length of the StringBuffer can be found by the length() method.while the total capacity can be found through the capacity() method.They have the following forms:

                      int length();

                      int capacity();

package stringdemo;

public class LengthAndCapacity {

    public static void main(String[] args) {

        StringBuffer s= new StringBuffer("Dance");

        

        System.out.println("Length="+s.length());

        System.out.println("Capacity"+s.capacity());

    }

}

OUTPUT:

Length=5

Capacity21

Here Length is 5 and capacity is 21 because room for 16 additional characters is automatically added,so result is 21.

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delete() and deleteCharAt() method

delete() and deleteCharAt() method:

Java  provides us to StringBuffer the ability to delete character using the method delete() and deleteCharAt(). These method are shown here:

         StringBuffer delete(int startIndex,int endIndex)
         StringBuffer deleteCharAt(int loc)

Here is a small program to demonstrate these method:


package stringdemo;


public class DeleteDemo {
    public static void main(String[] args) {
        StringBuffer s= new StringBuffer("I love you");
        
        s.delete(2, 5);
        System.out.println("After delete:"+s);
        
        s.deleteCharAt(0);
        System.out.println("After deleteCharAt:"+s);
    }

}

OUTPUT:

After delete:I e you

After deleteCharAt: e you

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Java program to show number pyramid

Number Pyramid:

package diamond;


public class PyramidDemo {
    public static void main(String[] args) {
        for(int i=0;i<5;i++) {
         for(int j=0;j<5-i;j++) {
             System.out.print(" ");
         }
        for(int k=0;k<=i;k++) {
            System.out.print("* ");
        }
        System.out.println();
    }

}
}

OUTPUT:

     * 

    * * 

   * * * 

  * * * * 

 * * * * * 

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Fibonacci Using Recusion method

Fibonacci Using Recusion method:

package diamond;

import static diamond.Fibonacci.fibonacciRecusion;


public class FibonacciDemo {
    public static void main(String[] args) {
        System.out.println("\nFibonacci by recusion");
        int febCount=15;
    for(int i=1; i<=febCount; i++){
      System.out.print(fibonacciRecusion(i) +" ");
    }
       
   
    }
}

The output of this program is as:

Fibonacci by recusion

1 1 2 3 5 8 13 21 34 55 89 144 233 377 610

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replace() method

Modifying a String:

replace();

    The replace method is used to replace the one character of string.It has the general form:
      
String replace(char original,char replace);


Here is a small program to show how replace() method works:

package stringdemo;


public class ReplaceDemo {
    public static void main(String[] args) {
        String s="HelloWorld";
       
        System.out.println(s.replace("H", "W"));
    }
}

Output:

WelloWorld

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concat() and trim() method

concat()

You can concat two String using concat() as shown below:


package stringdemo;


public class Concat {
    public static void main(String[] args) {
        String s1="ram";
        String s2="john";
        
        System.out.println(s1.concat(s2));
    }

}

The output of the above program is:

ramjohn

trim()

trim() method of String in java is used to remove whitespace.It has the general form:

String trim();

Here is a small program to demonstrate trim()method:

package stringdemo;

public class Trim {

    public static void main(String[] args) {

        String s="  Hello World";

        

        System.out.println(s.trim());

    }

}

The output of the above program is:

Hello World

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equals() Versus ==

equals() Versus ==

We should be clear that equals() method and == operator perform two different operations.The equals() method compares the character inside a string whereas == operator compares two object reference to see whether they refer to the same instances.Here is a small program to demonstrate the difference between equals()method vs == operator:


package stringdemo;


public class Equal {
    public static void main(String[] args) {
        String s1="john";
        String s2=new String(s1);
       
        System.out.println(s1.equals(s2));
        System.out.println(s1==s2);
    }
}

The above program gives the following output:

true

false

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equals() and equalsIgnoreCase()

String Comparision:

The String class includes many methods that compares Strings or Substrings within strings.

equals() and equalsIgnoreCase()


package stringdemo;


public class StringComparision {
    public static void main(String[] args) {
        String str="john";
        String str1="john";
        String str2="JOHN";
        String str3=new String("john");
        
        
        if(str==str1){
            System.out.println("Equal");
        }else{
        System.out.println("Not Equal");
        }
        
        if(str.equals(str1)){
            System.out.println("str is equal to str1");
        }else{
        System.out.println("str is not equal to str1");
        }
        
        if(str==str2){
        System.out.println("str is equal to str2");
        }else{
        System.out.println("str is not equal to str2");
        }
        
        if(str.equals(str2)){
            System.out.println("equals");
        }else{
        System.out.println(" not equals");
        }
        if(str.equalsIgnoreCase(str2)){
        System.out.println("equalsss");
        }else{
        System.out.println(" not equalsss");
        }
        
        if(str1==str3){
            System.out.println("str1 is equal to str3");
        }else{
        
        System.out.println("str1 is not  equal to str3");
        }
        
        if(str.equals(str3)){
            System.out.println("bang");
        }else{
            System.out.println("not bang");
        }
        }
    }

   
    The output of the above program is as below:

Equal
str is equal to str1
str is not equal to str2
 not equals
equalsss
str1 is not  equal to str3
bang

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Character Extraction

Character Extraction:

2)getChars()

If you want to extract more than one character at a time,you can use the getChars() method.
It has general form:
void getChars(int sourceStart,int sourceEnd,char target[],int targetStart);


package stringdemo;


public class NewClass {
    public static void main(String[] args) {
       
      String s="This is the demo of getChar()method";
      int start=5;
      int end=8;
       char ch[]=new char[end-start];
     
       s.getChars(start, end, ch, 0);
        System.out.println(ch);
    }
}

The output is:

is 

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Character Extraction

Character Extraction:

1) charAt()

charAt() method is used to extract single character from String.Here is a small program to demonstrate chatAt() method.  


package stringdemo;


public class NewClass {
    public static void main(String[] args) {
       
      String  ch="java";
        System.out.println(ch.charAt(1));
    }
}

The output of this program is as:

a

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String Concatenation with other data type

String Concatenation with other data type:

package stringdemo;


public class StringS {
    public static void main(String[] args) {
        String s="nine:"+4+4;
        System.out.println(s);
    }
}

Here output will be like 

nine:44.

   rather than

nine:8

To get 2nd type of output we must change the 

String s="nine:"+(4+4);

This will generate the output as:

nine:8

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String Concatenation:

String Con:catenation
Here is a small java program to demonstrate String Concatenation:

package stringdemo;


public class StringConcat {
    public static void main(String[] args) {
        String age="19";
        String s= "I am"+ age +"years old";
        System.out.println(s);
       
       
        //Using concatenation to prevent long lines.
       
        String str="I want to say u that"+"I love you";
        System.out.println(str);
    }
}

The output of this Program is shown below:

I am19years old

I want to say u thatI love you

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String Length in java

String Length in java:

The length of the String is the actual number of character that contains in it.To get this value,call the length() method as shown below:
int length();

Here is a short program to demonstrate String length:

package stringdemo;


public class StringLengthDemo {
    public static void main(String[] args) {
        char ch[]={'a','e','i','o','u'};
        String s= new String(ch);
        System.out.println(s.length());
    }
}

 The output of this program is as below:

5

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The String Constructor:

The String Constructor:
//Construct one String from other

class MakeString{
public Static void main(String[] args){

Char c[]={'d','o','g'};
String s1=new String(c);
String s2= new String(s1);

System.out.println(s1);
System.out.println(s2);
}

}
The output of this program is as follow:
dog
dog

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Passing object as parameter in java:

Passing object as parameter in java:

package using_object_as_parameter;

public class Make {
    int a,b;
   
    Make(int i,int j){
    a=i;
    b=j;
    }
   
    boolean equals(Make o){
    if(o.a==a &&o.b==b)return true;
    else return false;
    }
}

public class Passob {

    public static void main(String[] args) {

        Make obj = new Make(100,22);

        Make obj1 = new Make(1,2);

        

        System.out.println("obj==obj1:"+obj.equals(obj1));

    }

}

The output of this code is:

run:

obj==obj1:false

BUILD SUCCESSFUL (total time: 3 seconds)

Read More

Access Protection in java:

Access Protection in java:

private     No modifier protected public

 Same class yes yes yes yes

 Same package      no yes yes yes
 subclass

 Same package no yes yes yes
 non-subclass


  Different               no no yes                  yes
  package
  subclass


  Different no no no yes
  package
  non-subclass

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Method with Parameter in java

Method with Parameter in java
package javaapplication27;


public class MethodWithParameter {
    double width;
    double height;
    double depth;
   
   
     public double volume(){
return width * height * depth;

                }
    void setDim(double w,double h,double d){
    width=w;
    height=h;
    depth=d;
    }
   
    public static void main(String[] args) {
        MethodWithParameter obj= new MethodWithParameter();
       
        double vol;
       
        obj.setDim(5, 10, 15);
       vol=obj.volume();
       
        System.out.println("Volume is "+vol);
    }
}

 Output:
run:
Volume is 750.0

Read More

Stack in java:

Stack in java:

package javaapplication27;

import java.util.Stack;


public class TestStack {
   
    public static void main(String[] args) {
        Stack obj= new Stack();
        Stack obj1= new Stack();
       
        //push some number into the stack
       
        for(int i=0;i<10;i++)
            obj.push(i);
        for(int i=0;i<20;i++)
            obj1.push(i);
       
       
        //pop those numbers off the stack
       
        System.out.println("Stack in obj");
        for(int i=0;i<10;i++)
            System.out.println(obj.pop());
       
       
        System.out.println("Stack in obj1");
        for(int i=0;i<10;i++)
            System.out.println(obj1.pop());
           
    }
   
}

OUTPUT:

Stack in obj

9

8

7

6

5

4

3

2

1

0

Stack in obj1

19

18

17

16

15

14

13

12

11

10

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Recursion Function in java:

Recursion Function in java:

public class Factorial {
    //this is recursive function
    int fact(int n){
    int result;
 
    if(n==1)return 1;
    result=fact(n-1)*n;
    return result;
    }
}




public class RecursionDemo {
 
    public static void main(String[] args) {
        Factorial f =new Factorial();
     
        System.out.println("Factorial of 3 is"+f.fact(3));
        System.out.println("Factorial of 4 is"+f.fact(4));
        System.out.println("Factorial of 5 is"+f.fact(5));
    }
 
}

Output:
Factorial of 3 is6
Factorial of 4 is24
Factorial of 5 is120

Read More

Overloading Constructor:

Overloading Constructor:

package overloadingconstrucror;

public class Box {
    double width;
    double height;
    double depth;
   
    Box(double w,double h,double d){
    width=w;
    height=h;
    depth=d;
    }
   
    Box(){
    width=-2;
    height=-2;
    depth=-2;
    }
   
    //construcror used when cube is created
    Box(double leng){
    width=height=depth=leng;
    }
    double volume(){
    return width*height*depth;
    }
}

public class OverloadConstructor {

    public static void main(String[] args) {

        Box obj = new Box(5,10,15);

        Box obj1= new Box();

        Box obj2 = new Box(6);

        

        double vol;

        

        vol=obj.volume();

        System.out.println("volume "+vol);

        

        vol=obj2.volume();

        System.out.println("Volume "+vol);

    }

}

The above code give the output as:

run:

volume 750.0

Volume 216.0

Read More

Java break statement:

Java break statement:

package javaapplication27;


public class BreakDemo {
    public static void main(String[] args) {
        for(int i=0;i<=100;i++){
        if(i==10)break;         //break loop if i is 10;
            System.out.println("i"+i);
        }
        System.out.println("loop complete.");
    }
}

The output  of this program is:

run:

i0

i1

i2

i3

i4

i5

i6

i7

i8

i9

loop complete.

Read More

Nested Loop:

Nested Loop:


package javaapplication27;


public class NestedLoop {
    public static void main(String[] args) {
        int i,j;
        for(i=1;i<=10;i++){
        for(j=1;j<=10;j++){
            System.out.println(".");
            System.out.println();
        }
       
        }
    }
}

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Do-While loop:

Do-While loop:
package javaapplication27;

public class DowhileLoop {
    public static void main(String[] args) {
        int n=10;
        do{
            System.out.println("Go"+n);
            n--;
           
        }while(n>0);
    }
}

The output Is :

run:

Go10

Go9

Go8

Go7

Go6

Go5

Go4

Go3

Go2

Go1

Read More

java while loop

java while loop
package javaapplication27;


public class WhileloopDemo {
    public static void main(String[] args) {
        int n=10;
       
        while(n>0){
            System.out.println("go"+n);
            n--;
        }
    }
}

The output is :

run:

go10

go9

go8

go7

go6

go5

go4

go3

go2

go1

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Java twodimensional array:

Java twodimensional array:

package javaapplication27;


public class TwoDArrayDemo {
 
    public static void main(String[] args) {
        int array[][]=new int[4][];    //declaring two dimensional array
     
       array[0]=new int[1];
       array[1]=new int[2];
       array[2]=new int[3];
       array[3]=new int[4];
     
       int i,j,k=0;
     
       for(i=0;i<4;i++)
           for(j=0;j<i+1;j++){
           array[i][j]=k;
           k++;
           }
       for(i=0;i<4;i++){
       for(j=0;j<i+1;j++)
               System.out.println(array[i][j]+ " ");
          System.out.println();
       }
     
        }
    }
 
The output of this program is:
run:
0

1
2

3
4
5

6
7
8
9

BUILD SUCCESSFUL (total time: 1 second)

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one dimensional array:

one dimensional array:
package javaapplication27;


public class OneDArray {
    public static void main(String[] args) {
     
   
    int days[]=new int[12];//declaring array
    days[0]=1;
    days[1]=10;
    days[2]=112;
    days[3]=12;
    days[4]=13;
   
        System.err.println(days[0]);
   
}
}


The output is:
run:
1
BUILD SUCCESSFUL (total time: 1 second)

Read More

Java Program to show diamond Pattern:

Java Program to show diamond Pattern:

import java.util.Scanner;
public class MyDiamondPattern {
  public static void main(String[] args) {
    System.out
      .print("Enter the number of stars you want in diamond shape: ");
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    System.out.println("Diamond of Stars are \n");
    for (int i = 1; i <= n; i++) {
      for (int j = 0; j < (n - i); j++)
        System.out.print("  ");
      for (int j = 1; j <= i; j++)
        System.out.print(" *");
      for (int k = 1; k < i; k++)
        System.out.print(" *");
      System.out.println();
    }
 
    for (int i = n - 1; i >= 1; i--) {
      for (int j = 0; j < (n - i); j++)
        System.out.print("  ");
      for (int j = 1; j <= i; j++)
        System.out.print(" *");
      for (int k = 1; k < i; k++)
        System.out.print(" *");
      System.out.println();
    }
 
    System.out.println();
  }

}

The output of this program is below:
run:
Enter the number of stars you want in diamond shape: 7
Diamond of Stars are

             *
           * * *
         * * * * *
       * * * * * * *
     * * * * * * * * *
   * * * * * * * * * * *
 * * * * * * * * * * * * *
   * * * * * * * * * * *
     * * * * * * * * *
       * * * * * * *
         * * * * *
           * * *
             *

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java program to show fibonacci :

java program to show fibonacci :

public class MyFibonacci {
  public static int fibonacciRecusion(int number){
    if(number == 1 || number == 2){
      return 1;
    }
   
    return fibonacciRecusion(number-1) + fibonacciRecusion(number -2);
  }
 
  public static void main(String a[]){  
    int febCount = 50;
    int[] feb = new int[febCount];
    feb[0] = 1;
    feb[1] = 1;
   
    for(int i=2; i < febCount; i++){
      feb[i] = feb[i-1] + feb[i-2];
    }
   
    System.out.println("Fibonacci by loop and array");
    for(int i=0; i< febCount; i++){
      System.out.print(feb[i] + " ");
    }
   
    System.out.println("\nFibonacci by recusion");
    for(int i=1; i<=febCount; i++){
      System.out.print(fibonacciRecusion(i) +" ");
    }
  }
}

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Java program to show Factorail Number:

Java program to show Factorail Number:

import java.util.Scanner;

class MyFactorial {
  public static void main(String args[]) {
    int n, fact = 1;
 
    System.out.println("Enter an integer to calculate it's factorial");
    Scanner in = new Scanner(System.in);  
    n = in.nextInt();
 
    if ( n < 0 ) {
      System.out.println("Number should be non-negative.");
    } else {
      for ( int c = 1 ; c <= n ; c++ ) {
        fact *= c;
      }
      System.out.println("Factorial of "+n+" is = "+fact);
    }
  }
}
The output of this program is as:
Enter an integer to calculate it's factorial
6
Factorial of 6 is = 720

Read More

java program to display diamond:

java program to display diamond:


class MyDiamond {
  public static void main(String[] args) {
    for (int i = 1; i < 10; i += 2) {
      for (int j = 0; j < 9 - i / 2; j++)
        System.out.print(" ");

      for (int j = 0; j < i; j++)
        System.out.print("*");

      System.out.print("\n");
    }
 
    for (int i = 9; i > 0; i -= 2) {
      for (int j = 0; j < 9 - i / 2; j++)
        System.out.print(" ");

      for (int j = 0; j < i; j++)
        System.out.print("*");

      System.out.print("\n");
    }
  }
}
The output of this program is as:
          *
        ***
       *****
      *******
     *********
     *********
      *******
       *****
        ***
         *

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java program to demonstrate method overloading:

java program to demonstrate method overloading:
package javaapplication16;


public class MethodOverlodingDemo {
     int x;
    public void sum(){
        System.out.println("sum");
    }
    public void sum(int x){ //here method sum is overloaded by passing parameter
        this.x=x;
        System.out.println(x);
    }
    public static void main(String[] args) {
        MethodOverlodingDemo obj = new MethodOverlodingDemo();
       obj.sum();
       obj.sum(8);
       
    }
}

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java program to print FibonacciSeries

java program to print FibonacciSeries :
package pkgclass;


public class FibonaciSeries {
    public static void main(String args[])
{  
 int n1=0,n2=1,n3,i,count=10;  
 System.out.print(n1+" "+n2);  
   
 for(i=2;i<count;++i)  
 {  
  n3=n1+n2;  
  System.out.print(" "+n3);  
  n1=n2;  
  n2=n3;  
 }
}
}

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Java program to Demonstrate Abstract Class and Methods

Java program to Demonstrate Abstract Class and Methods:
package abstractclassdemo;


public abstract class Animal {
    public abstract void makesound();
}

*******************

package abstractclassdemo;

public class sheep extends Animal {

    @Override

    public void makesound() {

        

        System.out.println("mooooooooooooo");

    }

    

}

***************************************

package abstractclassdemo;

public class Tiger extends Animal {

    public void makesound(){

        System.out.println("roarrrrrrrrr");

    }

    

}

***********************

package abstractclassdemo;

public class AbstractClassDemo {

    

    public static void main(String[] args) {

  AbstractClassDemo obj=new AbstractClassDemo();

     Animal tigerobj=new Tiger();

     Animal sheepobj=new sheep();

     

     obj.SpecficSound(tigerobj);

    }

    public  static void SpecficSound(Animal animal){

animal.makesound();

}

    

}

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Java program to Overide toString Method:

Java program to Overide toString Method:


package overidetostringmethod;


public class Employee {
int empid;
String empName;
String empAddress;

 Employee() {
         this.empid=0;
 this.empName="default";
 this.empAddress="default";

    }
    
    public Employee(int empid,String empName,String empAddress){
    this.empid=empid;
    this.empName=empName;
    this.empAddress=empAddress;
    
    
    }

   
    
    public String toString(){
    String str= this.empid + this.empName +this.empAddress;
    return str;
    }

}

*************************************

package overidetostringmethod;

import java.util.Scanner;

public class MyClass {

    public static void main(String[] args) {

        Scanner input=new Scanner(System.in);

        

        

        Employee obj1= new Employee();

        System.out.println("Enter id");

        int id=input.nextInt();

        

        System.out.println("Enter Name");

        String name=input.next();

        

        System.out.println("Enter Address");

        String Address=input.next();

        

        Employee obj2= new Employee(id,name,Address);

        System.out.println(obj1.toString());

    }

 

}

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Java program to Demonstrate ShortCircuit:

Java program to Demonstrate ShortCircuit:

package shortcircuit;
import java.util.Scanner;

public class NewClass {
   
    public boolean getTrue(){
        System.out.println("Inside getTrue()");
        return true;
    }
        public boolean getFalse(){
            System.out.println("inside getFalse()");
            return false;
       
        }
       
        public static void main(){
        NewClass obj=new NewClass();
       
        if(obj.getTrue()||obj.getFalse()){
            System.out.println("T||F");
        }
       
        }
    }

//

package shortcircuit;

public class ShortCircuit {

    public boolean getTrue(){

        System.out.println("Inside getTrue()");

        return true;

    }

    public boolean getFalse(){

        System.out.println("Inside getFalse()");

        return false;

    }

   

    public static void main(String[] args) {

        ShortCircuit obj=new ShortCircuit();

        System.out.println("ShortCircuit:OR");

        

        if(obj.getTrue()||obj.getTrue()){

            System.out.println("T||T");

        }

         if(obj.getTrue()||obj.getFalse()){

            System.out.println("T||F");

        }

          if(obj.getFalse()||obj.getTrue()){

            System.out.println("F||T");

        }

           if(obj.getFalse()||obj.getFalse()){

            System.out.println("F||F");

        }

        

    }

    

}

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java program to find sum of each digit and repeat the process until users exit:

java program to find sum of each digit and repeat the process until users exit:

package javaapplication1;
import java.util.*;

public class SumofeachDigit {
   public static void main(String[] args){
   Scanner in=new Scanner(System.in);
 boolean quite=false;
 int choice=0;
 do{
     System.out.println("1.Enter a number to find sum of each digit");
     System.out.println("2.Quit");
   
   
     choice=in.nextInt();
   
     switch(choice){
         case 1:
             System.out.println("1.Enter a number");
             int og=in.nextInt();
             int num=og;
             int sum=0;
             int digit=0;
             int i=0;
                        if(num>0){
                        while((num!=0)){
             digit=num%10;
             sum +=digit;
             num=num/10;
             }
             System.out.println("sum of\t"+og+"="+sum);
                        }
                       
                        else{
                            System.out.println("Error");
                        }
           
            break;
         case 2:
                 quite=true;
                 break;
         default:System.out.println("Invalid");
     };
           
 
 }while(!quite);
       System.out.println("Thank u");
   }
}

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Java program to check ArmStrong Number

Java program to check ArmStrong Number:

package javaapplication1;
import java.util.*;

public class ArmStrongNumber {
    public static void main(String args[])
   {
      int n, sum = 0, og, r;

      Scanner in = new Scanner(System.in);
      System.out.println("Enter a number to check if it is an armstrong number");    
      n = in.nextInt();

      og = n;

      while( og != 0 )
      {
         r = og%10;
         sum = sum + r*r*r;
         og = og/10;
      }

      if ( n == sum )
         System.out.println("Entered number is an armstrong number.");
      else
         System.out.println("Entered number is not an armstrong number.");        
   }
}

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Java program to dispaly a current date:

Java program to dispaly a current date:


package javaapplication1;

import java.util.Calendar;
import java.util.GregorianCalendar;


public class DateDisplay {
     public static void main(String args[])
   {
      int day, month, year;
      int second, minute, hour;
      GregorianCalendar date = new GregorianCalendar();

      day = date.get(Calendar.DAY_OF_MONTH);
      month = date.get(Calendar.MONTH);
      year = date.get(Calendar.YEAR);

      second = date.get(Calendar.SECOND);
      minute = date.get(Calendar.MINUTE);
      hour = date.get(Calendar.HOUR);

      System.out.println("Current date is  "+day+"/"+(month+1)+"/"+year);
      System.out.println("Current time is  "+hour+" : "+minute+" : "+second);
   }
}

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java Switch Case:

java Switch Case:

package pkgclass;

import java.util.Scanner;

public class SwitchCondition {
    public static void main(String[] args) {
       
   
    Scanner obj = new Scanner(System.in);
    int input= obj.nextInt();
   
    switch (input) {
   
        case 1:
            System.out.println("hello");break;
        case 2:
            System.out.println("hi");break;
            case 3:
            System.out.println("Namaste");break;
            default:
                System.out.println("bye");
    }
    }
}

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Java program to demonstate For loop:

Java program to demonstate For loop:


package pkgclass;


public class ForLoopDemo {
    public static void main(String[] args) {
       
        for(int i=0;i<=10;i++){
            System.out.println("hello");
        }
    }
}

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Morning View Of Pashupatinath Temple:

Morning View Of Pashupatinath Temple:

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Java IfElse ladder Program

Java IfElse ladder Program:

package javaapplication16;
import java.util.Scanner;

public class IfElseLader {
   
    public static void main(String[] args) {
        Scanner obj= new  Scanner(System.in);
        int input = obj.nextInt();
       
        if(input>=80 && input<=100)
         {
           
             System.out.println("Distinction");
         }
         else if(input<=79 && input>=60)
         {
           
             System.out.println("First Division");

         }
         else if(input<=59 && input>=40)
         {
           
             System.out.println("Second Division");
         }
         else if(input<=39 && input>=35)
         {
             System.out.println("Third Division");
         }else{
            System.out.println("fail");
         }

       
    }
   
}

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Java program to demonstrate IfElse condition

Java program to demonstrate IfElse condition:
package javaapplication22;

import java.util.Scanner;
public class IfElseDEmo {
   
   
    public static void main(String[] args) {
        Scanner obj= new Scanner(System.in);
        int input = obj.nextInt();
       
        if(input>=40){
            System.out.println("pass");
        }else{
            System.out.println("Fail");
        }
       
    }
   
   
   
   
}

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java program to check whether a number is palindrome or not

java program to check whether a number is palindrome or not:

package javaapplication1;
import java.util.*;

public class PalindromeNumber {
    public static void main(String[] args){
    int num,rev=0;
  int dig;
    Scanner in=new Scanner(System.in);
         System.out.println("Enter a number to check if it is an palindrome number");
         num=in.nextInt();
       
         while(num!=0){
       
          dig = num % 10;
      rev = rev * 10 + dig;
      num = num / 10;
         }
    if(num==rev){
        System.out.println("palindrome number");
    }else{
    System.out.println(" not palindrome number");
    }
}
}

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Java program to reverse a number:

Java program to reverse a number:
package javaapplication1;
import java.util.*;
public class ReverseNumber {
 public static void main(String args[])
   {
      int n, reverse = 0;

      System.out.println("Enter the number to reverse");
      Scanner in = new Scanner(System.in);
      n = in.nextInt();

      while( n != 0 )
      {
          reverse = reverse * 10;
          reverse = reverse + n%10;
          n = n/10;
      }

      System.out.println("Reverse of entered number is "+reverse);
   }
}

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Java pogram to reverse a string

Java pogram to reverse a string:


package javaapplication1;
import java.util.Scanner;

public class ReverseString {
    public static void main(String args[])
   {
      String orig, rev = "";
      Scanner in = new Scanner(System.in);

      System.out.println("Enter a string to reverse");
      orig = in.nextLine();

      int length = orig.length();

      for ( int i = length - 1 ; i >= 0 ; i-- ){
         rev = rev+ orig.charAt(i);}

      System.out.println("Reverse of entered string is: "+rev);
   }
}

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java hello world program

// java hello world program
 public class HelloWorld{

public Static void main(String[] arg){
System.out.println("Hello world");
}
}

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