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

int[] x = new int[4]; 

This creates an array of 4 elements. Each element's value is 0.

for(int j : x) { 
   xy[j] += 1;
}

This iterates through all the values of x. At each iteration, j is the next element in x, but since all elements are initialized to 0, j is always 0. So, the 4 iterations increment xy[0].