Sorting Rows of Matrix in Descending Order Java 

 

Here is  the Program to Sort 2D array in Descending Order Java

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 import java.util.*;  
 public class Bubble_Sort_In_Matrix_Descending_Order  
 {  
   public static void main()  
   {  
    Scanner sc=new Scanner(System.in);  
    int n=0,temp,i,j;  
    System.out.println("Enter the number of Rows");  
    int r=sc.nextInt();  
    System.out.println("Enter the number of Columns");  
    int c=sc.nextInt();  
    int arr[][]=new int[r][c];  
    int brr[]=new int[r*c];  
    System.out.println("Enter the elements of Matrix");  
     for( i=0;i<r;i++)  
     {  
       for( j=0;j<c;j++)  
       {         
         arr[i][j]=sc.nextInt();  
       }        
     }  
     System.out.println("INPUT MATRIX IS:-");  
     for(i=0;i<r;i++)  
     {  
       for(j=0;j<c;j++)  
       {   
        brr[n++]=arr[i][j];  
       System.out.print(arr[i][j]+" ");          
       }  
       System.out.println("");  
     }  
     for(int l=0;l<n-1;l++)  
     {  
       for(int k=0;k<n-1;k++)  
       {  
         if(brr[k]<brr[k+1])  
         {  
           temp=brr[k];  
           brr[k]=brr[k+1];  
           brr[k+1]=temp;  
         }  
       }  
     }  
     n=0;  
     for(i=0;i<r;i++)  
     {  
       for(j=0;j<c;j++)  
       {          
         arr[i][j]=brr[n++];          
       }       
     }  
     System.out.println("REARRANGED MATRIX IS:-");  
     for(i=0;i<r;i++)  
     {  
       for(j=0;j<c;j++)  
       {      
         System.out.print(arr[i][j]+" ");  
       }  
       System.out.println("");  
     }  
   }  
 }  
 -------------  
 OUTPUT:-  
 ------------  
 Enter the number of Rows  
 4  
 Enter the number of Columns  
 4  
 Enter the elements of Matrix  
 1  
 5  
 6  
 3  
 2  
 4  
 8  
 9  
 7  
 5  
 6  
 3  
 2  
 1  
 5  
 9  
 INPUT MATRIX IS:-  
 1 5 6 3  
 2 4 8 9  
 7 5 6 3  
 2 1 5 9  
 REARRANGED MATRIX IS:-  
 9 9 8 7  
 6 6 5 5  
 5 4 3 3  
 2 2 1 1  
 --------  

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