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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 n=5;
  13.  
  14.       int m = n * 2;
  15.  
  16.          int i = 1;
  17.  
  18.          while (i <= n) {
  19.  
  20.              int j = 1;
  21.  
  22.              while (j < m) {
  23.  
  24.                  if (j >= i && j <= m - i) {
  25.  
  26.                      if (j <= n)
  27.  
  28.                          System.out.print (" " + (j - i + 1) + " ");
  29.  
  30.                      else
  31.  
  32.                          System.out.print (" " + (m - j - i + 1) + " ");
  33.  
  34.                  } else {
  35.  
  36.                      System.out.print ("   ");
  37.  
  38.                  }
  39.  
  40.                  j = j + 1;
  41.  
  42.              }
  43.  
  44.              System.out.println ();
  45.  
  46.              i = i + 1;
  47.  
  48.          } 
  49. 	}
  50. }
Success #stdin #stdout 0.04s 4386816KB
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stdin
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Standard input is empty
stdout
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 1  2  3  4  5  4  3  2  1 
    1  2  3  4  3  2  1    
       1  2  3  2  1       
          1  2  1          
             1
https://ideone.com/4pEyWt
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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