Calling move on a Window makes window disappear

When running the following program, the window instance disappears as soon
as its move method is sent. If I explictly do a show after the move, the window will
reappear.


import java.awt.*;

class win {
    public static void main(String argv[]) {
Frame f = new Frame();

Window w = new Window(f);

w.resize(100,100);

f.resize(200,200);
f.show();

w.show();

while (true) {
for (int y = 0; y < 100; y++) {
for (int x = 0; x < 100; x++) {
w.move(x, y);
}
}
}

    }
}