Java Loop Pro

Java methods

class Methods 

{

           Methods() 

           {

    System.out.println("Constructor method is called when an object of it's class is created");

  }

  public static void main(String[] args) 

  {

    staticMethod();

    Methods object = new Methods();

    object.nonStaticMethod();

   } 

   static void staticMethod() 

  {

    System.out.println("Static method can be called without creating object");

   }

   void nonStaticMethod() 

   {

    System.out.println("Non static method must be called by creating an object");

  }

}

Java String methods

            class StringMethods

  {

   public static void main(String args[])

   {

      int n;

      String s = "Java programming", t = "", u = "";

   System.out.println(s); 

    n = s.length();

    System.out.println("Number of characters = " + n);

    t = s.replace("Java", "C++");

    System.out.println(s);

    System.out.println(t); 

    u = s.concat(" is fun");

    System.out.println(s);

    System.out.println(u);

  }

}

Java program to convert Fahrenheit to Celsius

import java.util.*;

class FahrenheitToCelsius 

{

 public static void main(String[] args) 

{

    float temperatue;

    Scanner in = new Scanner(System.in);      

    System.out.println("Enter temperatue in Fahrenheit");

    temperatue = in.nextInt();

    temperatue = ((temperatue - 32)*5)/9;

 System.out.println("Temperatue in Celsius = " + temperatue);

  }

}

Java program to find odd or even

import java.util.Scanner;

class OddOrEven

{

 public static void main(String args[])

 {

      int x;

      System.out.println("Enter an integer to check if it is odd or even ");

      Scanner in = new Scanner(System.in);

      x = in.nextInt();

      if ( x % 2 == 0 )

         System.out.println("You entered an even number.");

      else

         System.out.println("You entered an odd number.");

   }

}

Java program to add two numbers

import java.util.Scanner;

import java.math.BigInteger;

class AddingLargeNumbers 

{

public static void main(String[] args) 

{

    String number1, number2;

    Scanner in = new Scanner(System.in);

    System.out.println("Enter first large number");

    number1 = in.nextLine();

    System.out.println("Enter second large number");

    number2 = in.nextLine();

    BigInteger first  = new BigInteger(number1);

    BigInteger second = new BigInteger(number2);

    BigInteger sum;

    sum = first.add(second);

    System.out.println("Result of addition = " + sum);

  }

}

How to get input from user in java

import java.util.Scanner;

class GetInputFromUser

{

 public static void main(String args[])

{

      int a;

      float b;

      String s;

      Scanner in = new Scanner(System.in);

      System.out.println("Enter a string");

      s = in.nextLine();

      System.out.println("You entered string "+s);

      System.out.println("Enter an integer");

      a = in.nextInt();

      System.out.println("You entered integer "+a);

      System.out.println("Enter a float");

      b = in.nextFloat();

      System.out.println("You entered float "+b);   

   }

}

Java program to print multiplication table

import java.util.Scanner;

class MultiplicationTable

{

 public static void main(String args[])

 {

      int n, c;

      System.out.println("Enter an integer to print it's multiplication table");

      Scanner in = new Scanner(System.in);

      n = in.nextInt();

      System.out.println("Multiplication table of "+n+" is :-");

      for ( c = 1 ; c <= 10 ; c++ )

         System.out.println(n+"*"+c+" = "+(n*c));

   }

}

Java program to print alphabets

class Alphabets

{

   public static void main(String args[])

   {

      char ch;

      for( ch = 'a' ; ch <= 'z' ; ch++ )

         System.out.println(ch);

   }

}

Java while loop

import java.util.Scanner;

class WhileLoop 

{

public static void main(String[] args) 

{

    int n;

    Scanner input = new Scanner(System.in);

    System.out.println("Input an integer"); 

    while ((n = input.nextInt()) != 0) 

    {

      System.out.println("You entered " + n);

      System.out.println("Input an integer");

    }

    System.out.println("Out of loop");

  }

}

Java while loop break program

import java.util.Scanner;

class BreakWhileLoop 

{

 public static void main(String[] args) 

{

    int n;

       Scanner input = new Scanner(System.in);

     while (true) 

     {

      System.out.println("Input an integer");

      n = input.nextInt();

      if (n == 0) 

     {

        break;

      }

      System.out.println("You entered " + n);

    }

  }

}

Java while loop break continue program

import java.util.Scanner;

class BreakContinueWhileLoop 

{

 public static void main(String[] args) 

{

    int n;

 Scanner input = new Scanner(System.in);

 while (true) 

 {

      System.out.println("Input an integer");

      n = input.nextInt();

      if (n != 0) 

     {

        System.out.println("You entered " + n);

        continue;

      }

      else 

      {

        break;

      }

    }

  }

}

Java for loop

class Stars 

{

 public static void main(String[] args) 

{

    int row, numberOfStars;

      for (row = 1; row <= 10; row++) 

      {

      for(numberOfStars = 1; numberOfStars <= row; numberOfStars++)

     {

        System.out.print("*");

      }

      System.out.println(); 

    }

  }

}