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  1. JDK
  2. JDK-4431066

JWindow(GraphicsConfiguration) incorrectly throws IAE

    Details

    • Type: Bug
    • Status: Closed
    • Priority: P3
    • Resolution: Duplicate
    • Affects Version/s: 1.4.0
    • Fix Version/s: None
    • Component/s: client-libs
    • Labels:

      Description



      Name: ooR10001 Date: 03/28/2001


      javax.swing.JWindow(GraphicsConfiguration conf) constructor incorrectly throws
      IllegalArgumentException when passed GraphicsConfiguration is from ScreenDevice
      and GraphicsEnvironment.isHeadless() returns false. This behavior contradicts
      with current javadoc which says:

      -----------------------
      public JWindow(GraphicsConfiguration gc)

            Creates a window with the specified GraphicsConfiguration of a screen
            device. This window will not be focusable.
            Parameters:
                  gc - the GraphicsConfiguration that is used to construct the new
                  window with; if gc is null, the system default GraphicsConfiguration
                  is assumed
            Throws:
                  IllegalArgumentException - if gc is not from a screen device. This
                  exception is always thrown when GraphicsEnvironment.isHeadless()
                  returns true
      -----------------------

      This is a test sample which shows the bug:
      --------------
      import java.awt.GraphicsEnvironment;
      import java.awt.GraphicsDevice;
      import java.awt.GraphicsConfiguration;
      import javax.swing.JWindow;

      public class t {

        public static void main(String[] args) {
            GraphicsEnvironment ge =
                GraphicsEnvironment.getLocalGraphicsEnvironment();
            GraphicsDevice[] gs = ge.getScreenDevices();
            GraphicsConfiguration[] cs = gs[0].getConfigurations();
            try {
                JWindow w = new JWindow(cs[0]);
            } catch (IllegalArgumentException iae) {
                if (GraphicsEnvironment.isHeadless()) {
                    System.out.println("Correctly thrown IAE in headless mode");
                } else {
                    System.out.println("Unexpected IAE thrown");
                }
            }
        }

      }
      --------------

      Output:
      --------------
      Unexpected IAE thrown
      --------------

      It needs to be fixed.
      Proposal fix is to not use call 'this((Frame)null, gc);' in this constructor.
      It causes the check that owned window should not be null.
      More correctly is to use 'super(gc); windowInit();' calls instead. This calling
      sequence is not requred not-null owned window.
                     
      ======================================================================

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              • Assignee:
                Unassigned
                Reporter:
                oovsunw Oov Oov (Inactive)
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