Another java.lang.ArrayIndexOutOfBoundsException

[vasil angelov]

Can anyone tell me why j gets the value of y, instead of 0 in the following snippet?

import java.util.Scanner;
public class matrix 
{
    public int x,y;
    public void init(int[][] matrix1)
    {
        int i;
        int j;
        Scanner input = new Scanner(System.in);
        System.out.printf("Enter x:");
        x=input.nextInt();
        System.out.printf("Enter y:");
        y=input.nextInt();
        matrix1 = new int[x][y];
 
        for( i=0 ; i<x ; i++)
        {    
            for( j=0 ; j<y ; j++);
            {
                //System.out.println("enter:");
                System.out.printf("%d %d",i,j);
                matrix1[i][j]=0;
 
            }
        }
    }
}
 

[Nepomuk]

At which point to you get the value of y for j? The inner for-loop will increase j until it's equal to y, but that's the idea, right? Or are you having problems understanding how a for-loop works?

[vasil angelov]

I solved it.The problem was at line 18 - i haven't noticed the semi-column after the for-loop.

[Nepomuk]

Ah, one of those mistakes you easily make but are difficult to find... Well done for doing so yourself! :-)

Greetings,
Nepomuk