ingrid.yao@Eng 1999-03-10

In JDK 1.1.7B, Polygon.getBounds() returns not an object copy but a
reference copy of its field. It can cause serious side-effects.

test program
=============

import java.awt.*;

public class PolyTest {
    public PolyTest() {
        int[] x = {0,10,10,0};
        int[] y = {0,0,10,10};
        Polygon p = new Polygon(x,y,4);
        System.out.println(p.getBounds());
        Rectangle r = p.getBounds();
        r.translate(-5,-5);
        System.out.println(p.getBounds());
    }

     public static void main(String[] args) {
          new PolyTest();
     }
}

Translate r, the bounds of polygon is also translated
because getBounds() returns only regerence copy.