Ich verwende Seaglass Look and Feel für meinen Java Swings-Code. Aber ich bekomme immer wieder diesen Fehler.

    Exception in thread "main" java.lang.NoClassDefFoundError: sun/swing/plaf/synth/SynthUI
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:278)
    at javax.swing.SwingUtilities.loadSystemClass(SwingUtilities.java:1873)
    at javax.swing.UIDefaults.getUIClass(UIDefaults.java:686)
    at javax.swing.UIDefaults.getUI(UIDefaults.java:758)
    at javax.swing.UIManager.getUI(UIManager.java:1013)
    at javax.swing.JRootPane.updateUI(JRootPane.java:483)
    at javax.swing.SwingUtilities.updateComponentTreeUI0(SwingUtilities.java:1230)
    at javax.swing.SwingUtilities.updateComponentTreeUI0(SwingUtilities.java:1245)
    at javax.swing.SwingUtilities.updateComponentTreeUI(SwingUtilities.java:1221)
    at jsupport.lookandfeel.LookAndFeel.changeLookandFeel(LookAndFeel.java:246)
    at jsupport.lookandfeel.LookAndFeel.<init>(LookAndFeel.java:22)
    at jsupport.lookandfeel.Main.main(Main.java:11)
Caused by: java.lang.ClassNotFoundException: sun.swing.plaf.synth.SynthUI
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    ... 25 more

Ich habe ein bisschen nachgeforscht und festgestellt, dass Seaglass mit Java 7 (meiner aktuellen Version) und damit dem Problem nicht funktioniert. Aber ich bin auf der Suche nach einer Möglichkeit, dies zum Laufen zu bringen, oder wenn jemand eine Demo hat, die perfekt mit der Java 7-Version funktioniert, wäre dies sehr hilfreich.

Mein Code:

   private void changeLookandFeel() {
    try {

        UIManager.removeAuxiliaryLookAndFeel(UIManager.getLookAndFeel());
        SyntheticaLookAndFeel.setWindowsDecorated(false);
        UIManager.setLookAndFeel(UIMANAGER_STRING);
         UIManager.setLookAndFeel("de.javasoft.plaf.synthetica.SyntheticaBlueIceLookAndFeel");

         for (int i = 0; i < LookAndFeel.getFrames().length; ++i) {
            SwingUtilities.updateComponentTreeUI(LookAndFeel.getFrames()[i]);
          SwingUtilities.updateComponentTreeUI(this);
       }
        SwingUtilities.updateComponentTreeUI(this);

    } catch (Exception ex) {
        try {
           UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
           UIManager.setLookAndFeel("de.javasoft.plaf.synthetica.SyntheticaBlackEyeLookAndFeel");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

Die Gläser, die ich benutze