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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