Java Program prints ip address

Java Program prints ip address | IP address Printing using Java

import java.net.InetAddress;
 
class IPAddress
{
   public static void main(String args[]) throws Exception
   {
      System.out.println(InetAddress.getLocalHost());
   }
}

Reverse number in Java || Java Reverse Given Number

Reverse number in Java || Java Reverse Given Number

import java.util.Scanner;   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);       n = in.nextInt();         while( n != 0 )       {           reverse = reverse * 10;           reverse = reverse + n%10;           n = n/10;       }         System.out.println("Reverse of entered number is "+reverse);    } }

add two matrices using Java | Addition of two matrices in Java

add two matrices using Java | Addition of two matrices in Java

import java.util.Scanner;   class AddTwoMatrix {    public static void main(String args[])    {       int m, n, c, d;       Scanner in = new Scanner(System.in);         System.out.println("Enter the number of rows and columns of matrix");       m = in.nextInt();       n = in.nextInt();         int first[][] = new int[m][n];       int second[][] = new int[m][n];       int sum[][] = new int[m][n];         System.out.println("Enter the elements of first matrix");         for (  c = 0 ; c < m ; c++ )          for ( d = 0 ; d < n ; d++ )             first[c][d] = in.nextInt();         System.out.println("Enter the elements of second matrix");         for ( c = 0 ; c < m ; c++ )          for ( d = 0 ; d < n ; d++ )             second[c][d] = in.nextInt();         for ( c = 0 ; c < m ; c++ )          for ( d = 0 ; d < n ; d++ )              sum[c][d] = first[c][d]+ second[c][d];         System.out.println("Sum of entered matrices:-");         for ( c = 0 ; c < m ; c++ )       {          for ( d = 0 ; d < n ; d++ )             System.out.print(sum[c][d]+"\t");            System.out.println();       }    } }

transpose matrix Program in Java | transpose matrix JAVA, Core Java transpose matrix Assignment

transpose matrix Program in Java | transpose matrix JAVA, Core Java transpose matrix Assignment

import java.util.Scanner;

class TransposeAMatrix
{
  public static void main(String args[])
  {
     int m, n, c, d;

     Scanner in = new Scanner(System.in);
     System.out.println("Enter the number of rows and columns of matrix");
     m = in.nextInt();
     n = in.nextInt();

     int matrix[][] = new int[m][n];

     System.out.println("Enter the elements of matrix");

     for ( c = 0 ; c < m ; c++ )          for ( d = 0 ; d < n ; d++ )             matrix[c][d] = in.nextInt();         int transpose[][] = new int[n][m];         for ( c = 0 ; c < m ; c++ )       {          for ( d = 0 ; d < n ; d++ )                            transpose[d][c] = matrix[c][d];                  }         System.out.println("Transpose of entered matrix:-");         for ( c = 0 ; c < n ; c++ )       {          for ( d = 0 ; d < m ; d++ )                System.out.print(transpose[c][d]+"\t");               System.out.print("\n");       }    } }    

java program multiply two matrices

java program multiply two matrices

import java.util.Scanner;
 
class MatrixMultiplication
{
   public static void main(String args[])
   {
      int m, n, p, q, sum = 0, c, d, k;
 
      Scanner in = new Scanner(System.in);
      System.out.println("Enter the number of rows and columns of first matrix");
      m = in.nextInt();
      n = in.nextInt();
 
      int first[][] = new int[m][n];
 
      System.out.println("Enter the elements of first matrix");
 
      for ( c = 0 ; c < m ; c++ )
         for ( d = 0 ; d < n ; d++ )
            first[c][d] = in.nextInt();
 
      System.out.println("Enter the number of rows and columns of second matrix");
      p = in.nextInt();
      q = in.nextInt();
 
      if ( n != p )
         System.out.println("Matrices with entered orders can't be multiplied with each other.");
      else
      {
         int second[][] = new int[p][q];
         int multiply[][] = new int[m][q];
 
         System.out.println("Enter the elements of second matrix");
 
         for ( c = 0 ; c < p ; c++ )
            for ( d = 0 ; d < q ; d++ )
               second[c][d] = in.nextInt();
 
         for ( c = 0 ; c < m ; c++ )
         {
            for ( d = 0 ; d < n ; d++ )
            {   
               for ( k = 0 ; k < p ; k++ )
               {
                  sum = sum + first[c][k]*second[k][d];
               }
 
               multiply[c][d] = sum;
               sum = 0;
            }
         }
 
         System.out.println("Product of entered matrices:-");
 
         for ( c = 0 ; c < m ; c++ )
         {
            for ( d = 0 ; d < q ; d++ )
               System.out.print(multiply[c][d]+"\t");
 
            System.out.print("\n");
         }
      }
   }
}