今天，我被更新我的Netbeans 6.8新的Netbeans 7.4和JDK1.7.0来1.7.0_45当我打开我以前上新的项目Netbeans版本sysnthetica look andfeel不工作:(其他一切工作完美:)
try {UIManager.setLookAndFeel(new SyntheticaBlackStarLookAndFeel());new frm_login().setVisible(true); } catch (Exception e) {e.printStackTrace(); }
这是错误：
Exception in thread 'main' java.lang.NoClassDefFoundError: sun/swing/plaf/synth/SynthUIat de.javasoft.plaf.synthetica.SyntheticaDefaultLookup.getDefault(SyntheticaDefaultLookup.java:84)at sun.swing.DefaultLookup.get(DefaultLookup.java:125)at javax.swing.plaf.basic.BasicButtonListener.getInputMap(BasicButtonListener.java:119)at javax.swing.plaf.basic.BasicButtonListener.installKeyboardActions(BasicButtonListener.java:95)at javax.swing.plaf.basic.BasicButtonUI.installKeyboardActions(BasicButtonUI.java:138)at javax.swing.plaf.basic.BasicButtonUI.installUI(BasicButtonUI.java:90)at javax.swing.JComponent.setUI(JComponent.java:664)at javax.swing.AbstractButton.setUI(AbstractButton.java:1807)at javax.swing.JButton.updateUI(JButton.java:146)at javax.swing.AbstractButton.init(AbstractButton.java:2172)at javax.swing.JButton.<init>(JButton.java:136)at javax.swing.JButton.<init>(JButton.java:90)at de.javasoft.plaf.synthetica.SyntheticaLookAndFeel.installCompatibilityDefaults(SyntheticaLookAndFeel.java:553)at de.javasoft.plaf.synthetica.SyntheticaLookAndFeel.access$4(SyntheticaLookAndFeel.java:405)at de.javasoft.plaf.synthetica.SyntheticaLookAndFeel$2.propertyChange(SyntheticaLookAndFeel.java:313)at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335)at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:327)at javax.swing.event.SwingPropertyChangeSupport.firePropertyChange(SwingPropertyChangeSupport.java:92)at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:263)at javax.swing.UIManager.setLookAndFeel(UIManager.java:545)at javaapplication1.JavaApplication1.main(JavaApplication1.java:27)Caused by: java.lang.ClassNotFoundException: sun.swing.plaf.synth.SynthUIat 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)... 21 moreJava Result: 1
发生这种情况的原因是什么？我该如何解决？
提前致谢 ！
