Clever Geek Handbook

Setting up a theme for the Metal LookAndFeel

Currently my application is running on Windows and as a new requirement we need a port on Linux.

But my application uses Windows look and feel which is only supported on Windows platform and I get the below exception when I run it on Linux.

I ran into issues such as mismatching component sizes and button colors when I planned to continue working with GTK.

Then I entered the Metal look and feel with my own theme, but still the app is throwing the same exception.

MetalLookAndFeel.setCurrentTheme(MyTheme());
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");

public class MyTheme extends DefaultMetalTheme {

    public String getName() {
        return "MyTheme";
    }
    ColorUIResource primary1 = new ColorUIResource(0, 78, 115);
    ColorUIResource primary2 = new ColorUIResource(102, 193, 122);
    ColorUIResource primary3 = new ColorUIResource(153, 244, 173);
    ColorUIResource secondary1 = new ColorUIResource(196, 172, 134);
    ColorUIResource secondary2 = new ColorUIResource(209, 192, 163);
    ColorUIResource secondary3 = new ColorUIResource(223, 211, 190);
    private final FontUIResource controlFont = new FontUIResource("Dialog", 0, 11);

    protected ColorUIResource getPrimary1() {
        return primary1;
    }

    protected ColorUIResource getPrimary2() {
        return primary2;
    }

    protected ColorUIResource getPrimary3() {
        return primary3;
    }

    protected ColorUIResource getSecondary1() {
        return secondary1;
    }

    protected ColorUIResource getSecondary2() {
        return secondary2;
    }

    protected ColorUIResource getSecondary3() {
        return secondary3;
    }

    public FontUIResource getControlTextFont() {
        return controlFont;
    }
}


INFO   | jvm 1    | main    | 2013/01/21 15:14:23.995 | Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.995 |     at javax.swing.plaf.basic.BasicButtonUI.getMinimumSize(BasicButtonUI.java:352)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.995 |     at javax.swing.JComponent.getMinimumSize(JComponent.java:1714)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.995 |     at java.awt.BorderLayout.minimumLayoutSize(BorderLayout.java:651)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.995 |     at java.awt.Container.minimumSize(Container.java:1651)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.995 |     at java.awt.Container.getMinimumSize(Container.java:1636)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at javax.swing.JComponent.getMinimumSize(JComponent.java:1716)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.FlowLayout.minimumLayoutSize(FlowLayout.java:448)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.Container.minimumSize(Container.java:1651)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.Container.getMinimumSize(Container.java:1636)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at javax.swing.JComponent.getMinimumSize(JComponent.java:1716)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.GridBagLayout.GetLayoutInfo(GridBagLayout.java:1094)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.GridBagLayout.getLayoutInfo(GridBagLayout.java:893)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.GridBagLayout.ArrangeGrid(GridBagLayout.java:2052)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.GridBagLayout.arrangeGrid(GridBagLayout.java:2008)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.GridBagLayout.layoutContainer(GridBagLayout.java:789)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.Container.layout(Container.java:1421)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.Container.doLayout(Container.java:1410)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.Container.validateTree(Container.java:1507)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.Container.validateTree(Container.java:1513)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.Container.validateTree(Container.java:1513)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.Container.validateTree(Container.java:1513)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.Container.validateTree(Container.java:1513)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.Container.validate(Container.java:1480)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at javax.swing.RepaintManager.validateInvalidComponents(RepaintManager.java:669)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:124)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.EventQueue.access$000(EventQueue.java:85)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.EventQueue$1.run(EventQueue.java:603)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.EventQueue$1.run(EventQueue.java:601)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.security.AccessController.doPrivileged(Native Method)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.EventQueue.dispatchEvent(EventQueue.java:612)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
INFO   | jvm 1    | main    | 2013/01/21 15:14:23.996 |     at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
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