Arrays and enhanced for loops?

Question

Can someone please explain what is going on in this method?

class test{  
public static void main(String args[])
{
   int[] x = new int[4]; 
   int[] xy = new i         


        

Answer 1

In your case you need only for-loop and not enhanced for-loop:

for(int j = 0 ; x.length > j; j ++) { 
   xy[j] += 1;
}

Problem with your code is that your loop traverse only at index 0 of xy hence you get xy as [4, 0, 0, 0]

int[] x = new int[4];//default values [0, 0, 0, 0]
int[] xy = new int[4]; //default values [0, 0, 0, 0]
for(int j : x) { // j is always 0
   xy[j] += 1;// xy[0] += 1
}