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  1. JDK
  2. JDK-6849331

Nimbus L&F: AbstractRegionPainter's paint context is not initialized

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    • Subcomponent:
    • Resolved In Build:
      b68
    • CPU:
      generic
    • OS:
      generic

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        Description

        When creating an instance of AbstractRegionPainter and then trying to invoke decodeX(), decodeY(), decodeAnchorY() etc. methods a NullPointerException is thrown.

        Please see the following code sample:

        import javax.swing.*;
        import java.awt.*;

        public class TestARP {

            public static void main(String[] args) {
                class MyARP extends javax.swing.plaf.nimbus.AbstractRegionPainter {
                    protected PaintContext getPaintContext() {
                        return null;
                    }
                    protected void doPaint(Graphics2D g, JComponent c,
                                           int width, int height,
                                           Object[] extendedCacheKeys) {
                    }
                    public void callDecodeAnchorX() {
                        decodeX(0.5f);
                    }
                }
                new MyARP().callDecodeAnchorX();
            }
        }
        -----------------------------------------
        output will be:

        Exception in thread "main" java.lang.NullPointerException
        at javax.swing.plaf.nimbus.AbstractRegionPainter$PaintContext.access$100(AbstractRegionPainter.java:472)
        at javax.swing.plaf.nimbus.AbstractRegionPainter.decodeX(AbstractRegionPainter.java:233)
        at TestARP$1MyARP.callDecodeAnchorX(TestARP.java:16)
        at TestARP.main(TestARP.java:19)

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                Assignee:
                peterz Peter Zhelezniakov
                Reporter:
                dbessono Dmitry Bessonov
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