Java program to find greatest number in array:
package arraydemo;
public class ArrayDemo {
public static void main(String[] args) {
...
Tuesday, December 29, 2015
Monday, December 28, 2015
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);
...
Sunday, December 27, 2015
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){
...
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;
...
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;
...
Saturday, December 26, 2015
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: ");
...
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);
...
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
...
Friday, December 25, 2015
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();
...
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...
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(" ");
...
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...
Thursday, December 24, 2015
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 {
...
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));
...
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() 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";
...
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)...
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";
...
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...
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";
...
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[]...
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
...
Wednesday, December 23, 2015
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;
...
Access Protection in java:
Access Protection in java:
private No modifier protected public
Same class yes yes yes yes
Same package no yes yes ...
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;
...
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();
...
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 {
...
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;
}
...
Tuesday, December 22, 2015
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;
...
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(".");
...
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--;
...
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);
...
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];
...
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;
...
Monday, December 21, 2015
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...
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);
}
...
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);
...
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++)
...
Friday, December 18, 2015
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...
Sunday, December 13, 2015
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; ...
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()...
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";
}
...
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...
Saturday, December 12, 2015
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{
...
Thursday, December 10, 2015
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...
Wednesday, December 9, 2015
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;
...
Tuesday, December 8, 2015
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)...
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");
}
...
Monday, December 7, 2015
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();
...
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();
...
Sunday, December 6, 2015
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...
Saturday, December 5, 2015
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);
...
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...
Friday, December 4, 2015
java hello world program
// java hello world program
public class HelloWorld{
public Static void main(String[] arg){
System.out.println("Hello world");
...
