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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		    int a[][] = new int [4][4];
  13.     int i,j;
  14.     int s = 0;
  15.     int len=a.length-1;
  16.  
  17.     for(i= 0;i<a.length; i++)
  18.         for(j = 0; j<a[i].length; j++){
  19.             a[i][j] = (int)(Math.random()*10);
  20.         }
  21.          System.out.println("Original matrix\n");   
  22.     for(i=0;i<a.length;i++){
  23.         for(j=0;j<a[i].length;j++)
  24.  
  25.         System.out.print(a[i][j] + "\t");
  26.         System.out.println();   
  27.     }
  28.     for(i=0;i<a.length;i++){
  29.         for(j=0;j<a[i].length;j++)
  30.             if(!((i==0)||(j==0)||(j==len)||(i==len))){
  31.             	a[i][j]=1;
  32.             }
  33.  
  34.     }
  35.  System.out.println("\nConverted matrix\n");   
  36. for(i=0;i<a.length;i++){
  37.         for(j=0;j<a[i].length;j++)
  38.  
  39.         System.out.print(a[i][j] + "\t");
  40.         System.out.println();   
  41.     }
  42.  
  43.  
  44.  
  45. 	}
  46. }
Success #stdin #stdout 0.09s 320320KB
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Standard input is empty
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Original matrix

8	2	8	9	
6	7	6	0	
1	8	1	7	
5	2	1	7	

Converted matrix

8	2	8	9	
6	1	1	0	
1	1	1	7	
5	2	1	7
https://ideone.com/JYfbRu
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

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