Two variables. One assignment. You change y, and x changes with it:



int[] x = {1, 2, 3};
int[] y = x;
y[0] = 99;

System.out.println(x[0]); // 99. You never touched x.






If that has ever bitten you, here is the missing picture. It is small, it fits in your head, and it predicts everything in this post.




A note, not a box


The lie...