Name: sdR10048 Date: 06/11/2001


protected Popup(Component owner, Component contents, int x, int y)
throws undocumented HeadlessException in headless implementation.
See example for details:
--------------------------------------------------
[archer] ~/tmp
% cat Test.java
import java.awt.*;
import javax.swing.*;

class StubPopup extends Popup {
    public StubPopup(Component owner, Component contents, int x, int y) {
        super(owner, contents, x, y);
    }
}

public class Test {
    public static void main(String[] args) {
        new StubPopup(new Canvas(), new Canvas(), 0, 0);
    }
}
[archer] ~/tmp
% java -version
java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b65)
Java HotSpot(TM) Client VM (build 1.4.0-beta-b65, mixed mode)
[archer] ~/tmp
% javac Test.java
[archer] ~/tmp
% java -Djava.awt.headless=true Test
Exception in thread "main" java.awt.HeadlessException
        at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:123)
        at java.awt.Window.<init>(Window.java:252)
        at java.awt.Frame.<init>(Frame.java:390)
        at java.awt.Frame.<init>(Frame.java:355)
        at javax.swing.Popup$DefaultFrame.<init>(Popup.java:208)
        at javax.swing.Popup.getParentWindow(Popup.java:160)
        at javax.swing.Popup.createComponent(Popup.java:171)
        at javax.swing.Popup.reset(Popup.java:115)
        at javax.swing.Popup.<init>(Popup.java:72)
        at StubPopup.<init>(Test.java:6)
        at Test.main(Test.java:12)
--------------------------------------------------
Javadoc says:

protected Popup(Component owner,
                Component contents,
                int x,
                int y)

     Creates a Popup for the Component owner containing the Component contents. owner is used to
     determine which Window the new Popup will parent the Component the Popup creates to. A null
     owner implies there is no valid parent. x and y specify the preferred initial location to
     place the Popup at. Based on screen size, or other paramaters, the Popup may not display at
     x and y.

     Parameters:
         owner - Component mouse coordinates are relative to, may be null
         contents - Contents of the Popup
         x - Initial x screen coordinate
         y - Initial y screen coordinate
     Throws:
         IllegalArgumentException - if contents is null

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