how come this doesn't work java?

[saurabh pant]

package pack1;


import javax.swing.JOptionPane;

public class cube
{
    public static void main(String args[])
    {
          int x=1,i=0;
          String s=JOptionPane.showInputDialog("size of the cube(ODD)"); 
          int n=Integer.parseInt(s);
          int [][] ori=new int[n][n];
          String [][] dup=new String[n][n];
          int a=(n-1)/2;
          int j=a;

          for(int h=0;h<n;h++)
          {
              for(int r=0;r<n;r++)
              {
                  dup[h][r]="EMPTY";
              }
          }
          ori[i][j]=x;
          dup[i][j]="FULL";

          for(int k=0;k<n*n;k++)
          {
              i--;
              j++;
              if(i==-1 && j==n)
              {
                    if(dup[n-1][0].equals("EMPTY"))
                    {
                        ori[n-1][0]=++x;
                        dup[n-1][0]="FULL";
                        i=n-1;
                        j=0;
                    }
                    else
                    {
                        ori[1][n-1]=++x;
                        dup[1][n-1]="FULL";
                        i=1;
                        j=n-1;
                    }

              }

              else if(i==-1)
              {
                  if(dup[n-1][j].equals("EMPTY"))
                  {
                      ori[n-1][j]=++x;
                      dup[n-1][j]="FULL";
                      i=n-1;

                  }
                  else
                  {
                      ori[0][j]=++x;
                      dup[0][j]="FULL";
                      i=0;
                  }
              }

              else if(j==n)
              {
                  if(dup[i][0].equals("EMPTY"))
                  {
                      ori[i][0]=++x;
                      dup[i][0]="FULL";
                      j=0;
                  }
                  else
                  {
                      ori[i+2][j-1]=++x;
                      dup[i+2][j-1]="FULL";
                      i=i+2;
                      j=j-1;
                  }
              }

              else
              {
                  if(dup[i][j].equals("EMPTY"))
                  {
                      ori[i][j]=++x;
                      dup[i][j]="FULL";
                  }
                  else
                  {
                      ori[i+2][j-1]=++x;
                      dup[i+2][j-1]="FULL";
                      i=i+2;
                      j=j-1;
                  }
              }
          }
          for(int t=0;t<n;t++)
          {
              for(int u=0;u<n;u++)
              {
                  System.out.print(ori[t][u]+"   ");
              }
              System.out.print("\n");
          }
    }
}
>

[Hunter McMillen]

What specifically are you having trouble with? Are you getting incorrect output? Do you get compile or runtime errors? You need to give more information about your problem.

Hunter

[saurabh pant]

When I give input:3
I get,

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 3
at pack1.cube.main(cube.java:94)
Java Result: 1


I dry run it.i dont know where the problem resides..!!

[Jeff Verdegan]

saurabh pant wrote:When I give input:3
I get,

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 3
at pack1.cube.main(cube.java:94)
Java Result: 1


I dry run it.i dont know where the problem resides..!!

The error message is telling you exactly what's wrong. It's telling you that on line 94 of cube.java, you're trying to access the 4th element (at index 3) of an array that has fewer than 4 elements.

[saurabh pant]

I pinpointed d flaw...thanks a lot..!

[Jeff Verdegan]

You're quite welcome!

[Campbell Ritchie]

Welcome to the Ranch Please avoid abbreviations like “d”.

[saurabh pant]

I will keep that in mind...Thanks for the site...a great support...indeed..!