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  1. JDK
  2. JDK-5096948

1.5.0 Regression: NPE when switching from Metal L&F with JComboBox

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    • beta
    • x86
    • windows_nt

    Backports

      Description

        Bug 4864304 made various performance enhancements to Swing. One of the things it did was to allow null for the horizontal scroll bar of a JScrollPane. It then changed BasicComboPopup to set the horizontal scrollbar of the scrollpane to null.

        After this fix, when using a JComboBox to switch the look and feel from Metal, a NullPointerException is thrown from MetalScrollPaneUI.uninstallUI (which doesn't check for null). A test case is attached (JSliderTest.java). Run it, and switch to another L&F.

        Note: I have another test case which does something similar (ListTest.java), but it isn't affected. I don't know why - could this be timing related?

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            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-2120216 1.5.0 Regression: NPE when switching from Metal L&F with JComboBox

            • P3 - Major loss of function.
            • Resolved
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-4864304 Improve memory consumption of Swing apps

            • P3 - Major loss of function.
            • Resolved

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                svioletsunw Scott Violet (Inactive)
                shickeysunw Shannon Hickey (Inactive)
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