TileTest

import java.awt.*;
import java.util.*;

public class TileTest
{ public static void main(String[] args)
{ Tile[] a = new Tile[20];

int i;
for (i = 0; i < a.length; i++)
a[i] = new Tile(i, i, 10, 20,
(int)(100 * Math.random()));

Arrays.sort(a);

for (i = 0; i < a.length; i++)
System.out.println(a[i]);
}
}

class Tile extends Rectangle implements Comparable
{ public Tile(int x, int y, int w, int h, int zz)
{ super(x, y, w, h);
z = zz;
}

public int compareTo(Object b)
{ Tile tb = (Tile)b;
return z - tb.z;
}

public String toString()
{ return super.toString() + "[z=" + z + "]";
}

private int z;
}