Top 100 Java Programs

Hello World Program in Java

Java Programs

public class HelloWorld { public static void main(String[] args) { System.out.println(“Hello World!”); } } Output: Hello World!

Variables Initialization Programs Program in Java

Java Programs

public class VariablesInitialization { public static void main(String[] args) { // TODO code application logic here boolean flag=true; System.out.println(flag); System.out.println(“Flag=”+flag); […]

Operators Program in Java

Java Programs

public class JavaOperators { public static void main(String args[]) { System.out.println(“Example 1:——————————-“); //Java Unary Operator Example: ++ and — int […]

Fahrenheit to Celsius Program in Java

Java Programs

°C = (°F – 32) / (9/5) import java.util.Scanner; public class JavaFarenheitToCelsius { public static void main(String[] args) { float […]

Marks Average Program in Java

Java Programs

import java.util.Scanner; public class JavaMarksAverage { public static void main(String[] args) { int math,english,science,art,computer,total,percent; Scanner sc=new Scanner(System.in); System.out.println(“Enter marks out […]

Simple Interest Program in Java

Java Programs

Simple Interest = (Princple * Rate * Time)/100 import java.util.Scanner; public class JavaSimpleInterest { public static void main(String[] args) { […]

Find Area Circle Program in Java

Java Programs

Area of Circle = (22/7) X radius x radius import java.util.Scanner; public class JavaFindAreaCircle { public static void main(String[] args) […]

Find Area of Rectangle Program in Java

Java Programs

Area of Rectangle= Length X Breadth import java.util.Scanner; public class JavaFindAreaRectangle { public static void main(String[] args) { int l,b,area; […]

Swapping Program in Java

Java Programs

public class JavaSwap { public static void main(String[] args) { int a=10, b=20, temp; System.out.println(“Before swapping”); System.out.println(“value of a=”+a); System.out.println(“value […]

Swapping with Two Variables Program in Java

Java Programs

public class JavaSwapWithTwoVars { public static void main(String[] args) { int a=10, b=20; System.out.println(“Before swapping”); System.out.println(“value of a=”+a); System.out.println(“value of […]

Increment Decrement Operators Program in Java

Java Programs

public class JavaIncrementDecrementOperator { public static void main(String[] args) { int i=10,j=10,num=0; System.out.println(“i=”+i); System.out.println(“j=”+j); System.out.println(“num=”+num); System.out.println(“—————————————“); i++; j–; System.out.println(“i=”+i); System.out.println(“j=”+j); […]

Duplicate Words in String Program in Java

Java Programs

public class DuplicateWord { public static void main(String[] args) { String string = “Big black bug bit big bug black […]

Digit to Word Program in Java

Java Programs

import java.util.Scanner; public class DigitToWord { public static void main(String[] args) { // TODO code application logic here int r, […]

Binary Search Program in Java

Java Programs

import java.util.*; public class BinarySearch { public static void main(String[] args) { int n, lb, ub, mid, pos = -1; […]

Equal Number Program in Java

Java Programs

import java.util.Scanner; public class EqualNumber { public static void main(String[] args) { int n; Scanner sc = new Scanner(System.in); System.out.print(“Enter […]

Even Odd Program in Java

Java Programs

import java.util.Scanner; public class EvenOdd { public static void main(String[] args) { int number; Scanner sc = new Scanner(System.in); System.out.print(“Enter […]

Greater Number Program in Java

Java Programs

import java.util.Scanner; public class GreaterNumber { public static void main(String[] args) { int n1, n2; Scanner sc = new Scanner(System.in); […]

Greatest Number Program in Java

Java Programs

import java.util.Scanner; public class GreatestNumber { public static void main(String[] args) { int n1, n2, n3; Scanner sc = new […]

Leap Year Program in Java

Java Programs

import java.util.Scanner; public class LeapYear { public static void main(String[] args) { int year; Scanner sc = new Scanner(System.in); System.out.print(“Enter […]

Passing Division Program in Java

Java Programs

import java.util.Scanner; public class PassingDivision { public static void main(String[] args) { // TODO code application logic here int math, […]

Voting Age Program in Java

Java Programs

A person can votes if age is greater than or equal to 18. import java.util.Scanner; public class VotingAge { public […]

Java Operators Program in Java

Java Programs

public class JavaOperators { public static void main(String args[]) { System.out.println(“Example 1:——————————-“); // Java Unary Operator Example: ++ and — […]

Armstrong Number Program in Java

Java Programs

A positive number is called armstrong number if it is equal to the sum of cubes of its digits. Examples: […]

Automorphic Number Program in Java

Java Programs

An Automorphic number is a number whose square “ends” in the same digits as the number itself. Examples: 5*5 = […]

Buzz Number Program in Java

Java Programs

A number is said to be Buzz Number if it ends with 7 or is divisible by 7. Example: 1007 […]

Circular Prime Program in Java

Java Programs

A circular prime is a prime number with the property that the number generated at each intermediate step when cyclically […]

CoPrime Numbers Program in Java

Java Programs

Two integers a and b are said to be relatively prime, mutually prime, or coprime if the only positive integer […]

Digit to Word Program in Java

Java Programs

import java.util.Scanner; public class DigitToWord { public static void main(String[] args) { // TODO code application logic here int r, […]

Duck Number Program in Java

Java Programs

A Duck number is a number which has zeroes present in it, but there should be no zero present in […]

Factorial Program in Java

Java Programs

Factorial is the product of all positive integers less than or equal to n. Examples: 4! = 4 × 3 […]

Factors Program in Java

Java Programs

Factors of 24: 1, 2, 3, 4, 6, 8, 12, 24. import java.util.Scanner; public class Factors { public static void […]

Fibonacci Series Program in Java

Java Programs

A series of numbers in which each number ( Fibonacci number ) is the sum of the two preceding numbers. […]

Floyd Triangle Program in Java

Java Programs

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 public class FloydTriangle { public […]

Greatest Common Divisor Program in Java

Java Programs

the greatest common divisor (gcd) of two or more integers, which are not all zero, is the largest positive integer […]

Happy Number Program in Java

Java Programs

import java.util.Scanner; public class HappyNumber { public static void main(String[] args) { int n, r = 1, num, sum = […]

Harshad Number Program in Java

Java Programs

import java.util.Scanner; public class HarshadNumber { public static void main(String[] args) { int r, n, num, sum = 0; Scanner […]

Least Common Multiple Program in Java

Java Programs

import java.util.Scanner; public class LCMProgram { public static void main(String[] args) { int a, b, gcd = 1, lcm = […]

Multiply Of Digit Program in Java

Java Programs

import java.util.Scanner; public class MultiplyOfDigit { public static void main(String[] args) { // TODO code application logic here int r, […]

Neon Number Program in Java

Java Programs

import java.util.Scanner; public class NeonNumber { public static void main(String[] args) { // TODO code application logic here int n, […]

Niven Number Program in Java

Java Programs

import java.util.Scanner; public class NivenNumber { public static void main(String[] args) { // TODO code application logic here int n, […]

Palindrome Number Program in Java

Java Programs

import java.util.Scanner; public class PalindromeNumber { public static void main(String[] args) { int n, num, r, rev = 0; Scanner […]

Perfect Number Program in Java

Java Programs

import java.util.Scanner; public class PerfectNumber { public static void main(String[] args) { // TODO code application logic here int n, […]

Prime Number Program in Java

Java Programs

import java.util.Scanner; public class PrimeNumber { public static void main(String[] args) { // TODO code application logic here int n, […]

Reverce Number Program in Java

Java Programs

import java.util.Scanner; public class ReverceNumber { public static void main(String[] args) { // TODO code application logic here int n, […]

Special Number Program in Java

Java Programs

import java.util.Scanner; public class SpecialNumber { public static void main(String[] args) { // TODO code application logic here int n, […]

Spy Number Program in Java

Java Programs

import java.util.Scanner; public class SpyNumber { public static void main(String[] args) { // TODO code application logic here int r, […]

Sum of Digits Program in Java

Java Programs

import java.util.Scanner; public class SumofDigits { public static void main(String[] args) { // TODO code application logic here int r, […]

Twin Prime Program in Java

Java Programs

import java.util.Scanner; public class TwinPrime { public static void main(String[] args) { int a, b; Scanner sc = new Scanner(System.in); […]

Twisted Prime Program in Java

Java Programs

import java.util.Scanner; public class TwistedPrime { public static void main(String[] args) { // TODO code application logic here int n, […]

Unique Number Program in Java

Java Programs

import java.util.Scanner; public class UniqueNumber { public static void main(String[] args) { // TODO code application logic here int r1, […]

Name Of Day Program in Java

Java Programs

import java.util.Scanner; public class NameOfDay { public static void main(String[] args) { int day; Scanner sc=new Scanner(System.in); System.out.print(“Enter day=”); day=sc.nextInt(); […]

Menu Driven Program in Java

Java Programs

import java.util.Scanner; public class Menu { public static void main(String[] args) { int choice; double area; int l,b; int a; […]

Vowels Character Program in Java

Java Programs

import java.util.Scanner; public class VowelsCharacter { public static void main(String[] args) { char ch; Scanner sc=new Scanner(System.in); System.out.print(“Enter Character=”); ch=sc.next().charAt(0); […]

Name Of Month in Java

Java Programs

import java.util.Scanner; public class NameOfMonth { public static void main(String[] args) { int month; Scanner sc = new Scanner(System.in); System.out.print(“Enter […]

Pattern Type One Program in Java

Java Programs

public class Pattern1 { public static void main(String[] args) { for (int i = 1; i

Pattern Type Two Program in Java

Java Programs

public class Pattern11 { public static void main(String[] args) { for (int i = 5; i >= 1; i–) { […]

Pattern Type Three Program in Java

Java Programs

public class Pattern21 { public static void main(String[] args) { for (int i = 1; i = 1; j–) { […]

Pattern Pyramid Program in Java

Java Programs

public class Pattern31 { public static void main(String[] args) { for (int i = 1; i = 1; j–) { […]

Pattern Reverse Pyramid Program in Java

Java Programs

public class Pattern34 { public static void main(String[] args) { for (int i = 5; i >= 1; i–) { […]

Pattern Diamond Program in Java

Java Programs

public class Pattern37 { public static void main(String[] args) { for (int i = 1; i = 1; j–) { […]

Number Series Program in Java

Java Programs

import java.util.Scanner; public class NumberSeries { public static void main(String[] args) { int n, sum = 0; Scanner sc = […]

Even Number Series Program in Java

Java Programs

import java.util.Scanner; public class EvenNumberSeries { public static void main(String[] args) { int n, sum = 0; Scanner sc = […]

Odd Number Series Program in Java

Java Programs

import java.util.Scanner; public class OddNumberSeries { public static void main(String[] args) { int n, sum = 0; Scanner sc = […]

Square Number Series Program in Java

Java Programs

import java.util.Scanner; public class SquareNumberSeries { public static void main(String[] args) { int n,sum=0; Scanner sc = new Scanner(System.in); System.out.print(“Enter […]

Square Post Number Series Program in Java

Java Programs

import java.util.Scanner; public class SquarePostNumberSeries { public static void main(String[] args) { int n,sum=0; Scanner sc = new Scanner(System.in); System.out.print(“Enter […]

Square Pre Number Series Program in Java

Java Programs

import java.util.Scanner; public class SquarePreNumberSeries { public static void main(String[] args) { int n,sum=0; Scanner sc = new Scanner(System.in); System.out.print(“Enter […]