Simple Java program for beginners

1.Java program to print the “ Hello Java”

Import java.io.*;

Class A

{

public static void main(String args [])

{

System.out.println(“ Hello Java”);

}

}




2.Java program to take an integer as input and print it

import java.io.*;

import java.util.Scanner;

// Driver Class

class GFG {

// main function

public static void main(String[] args)

{

// Declare the variables

int num;

// Input the integer

System.out.println("Enter the integer: ");

// Create Scanner object

Scanner s = new Scanner(System.in);

// Read the next integer from the screen

num = s.nextInt();

// Display the integer

System.out.println("Entered integer is: " + num);

}

}

Input

, Enter the integer: 10

Output

Entered integer is: 10

3.Java Program to print Multiplication of two floating point Number.

import java.io.*;

class GFG {

public static void main(String[] args)

{

// f is to ensures that numbers are float DATA TYPE

float f1 = 1.5f;

float f2 = 2.0f;

// to store the multiplied value

float p = f1 * f2;

// to print the product

System.out.println("The product is: " + p);

}

}

Output

The product is: 3.0



4.Java Program to Swap Two values using third variable using temp variable

// Importing generic libraries

import java.util.*;

class GFG {

// Function to swap two numbers

// Using temporary variable

static void swapValuesUsingThirdVariable(int m, int n)

{

// Swapping the values

int temp = m;

m = n;

n = temp;

System.out.println("Value of m is " + m