apariencia en java

[lincolnf_2]

bueno lo he intentado pero sale este error cuando trato de cambiarle el skin, la verdad es que no me ha funcionado. estoy utilizando la version 5.0 de la libreria substance.jar....



org.jvnet.substance.api.UiThreadingViolationExcept ion: Component creation must be done on Event Dispatch Thread
at org.jvnet.substance.utils.SubstanceCoreUtilities.t estComponentCreationThreadingViolation(SubstanceCo reUtilities.java:2312)
at org.jvnet.substance.SubstancePanelUI.createUI(Subs tancePanelUI.java:57)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java :37)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java :244)
at javax.swing.UIDefaults.getUI(UIDefaults.java:752)
at javax.swing.UIManager.getUI(UIManager.java:989)
at javax.swing.JPanel.updateUI(JPanel.java:109)
at javax.swing.JPanel.<init>(JPanel.java:69)
at javax.swing.JPanel.<init>(JPanel.java:92)
at javax.swing.JPanel.<init>(JPanel.java:100)
at javax.swing.JRootPane.createGlassPane(JRootPane.ja va:528)
at javax.swing.JRootPane.<init>(JRootPane.java:348)
at javax.swing.JFrame.createRootPane(JFrame.java:255)
at javax.swing.JFrame.frameInit(JFrame.java:236)
at javax.swing.JFrame.<init>(JFrame.java:159)
at javaapplication1.principal.<init>(principal.java:2 0)
at javaapplication1.JavaApplication1.main(JavaApplica tion1.java:21)
UIDefaults.getUI() failed: createUI() failed for javax.swing.JPanel[,0,0,0x0,invalid,layout=java.awt.FlowLayout,alignm entX=0.0,alignmentY=0.0,border=,flags=9,maximumSiz e=,minimumSize=,preferredSize=] java.lang.reflect.InvocationTargetException
java.lang.Error
at javax.swing.UIDefaults.getUIError(UIDefaults.java: 712)
at javax.swing.MultiUIDefaults.getUIError(MultiUIDefa ults.java:133)
at javax.swing.UIDefaults.getUI(UIDefaults.java:758)
at javax.swing.UIManager.getUI(UIManager.java:989)
at javax.swing.JPanel.updateUI(JPanel.java:109)
at javax.swing.JPanel.<init>(JPanel.java:69)
at javax.swing.JPanel.<init>(JPanel.java:92)
at javax.swing.JPanel.<init>(JPanel.java:100)
at javax.swing.JRootPane.createGlassPane(JRootPane.ja va:528)
at javax.swing.JRootPane.<init>(JRootPane.java:348)
at javax.swing.JFrame.createRootPane(JFrame.java:255)
at javax.swing.JFrame.frameInit(JFrame.java:236)
at javax.swing.JFrame.<init>(JFrame.java:159)
at javaapplication1.principal.<init>(principal.java:2 0)
at javaapplication1.JavaApplication1.main(JavaApplica tion1.java:21)
org.jvnet.substance.api.UiThreadingViolationExcept ion: Component creation must be done on Event Dispatch Thread
at org.jvnet.substance.utils.SubstanceCoreUtilities.t estComponentCreationThreadingViolation(SubstanceCo reUtilities.java:2312)
at org.jvnet.substance.SubstancePanelUI.createUI(Subs tancePanelUI.java:57)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java :37)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java :244)
at javax.swing.UIDefaults.getUI(UIDefaults.java:752)
at javax.swing.UIManager.getUI(UIManager.java:989)
at javax.swing.JPanel.updateUI(JPanel.java:109)
at javax.swing.JPanel.<init>(JPanel.java:69)
at javax.swing.JPanel.<init>(JPanel.java:92)
at javax.swing.JPanel.<init>(JPanel.java:100)
at javax.swing.JRootPane.createContentPane(JRootPane. java:503)
at javax.swing.JRootPane.<init>(JRootPane.java:350)
at javax.swing.JFrame.createRootPane(JFrame.java:255)
at javax.swing.JFrame.frameInit(JFrame.java:236)
at javax.swing.JFrame.<init>(JFrame.java:159)
at javaapplication1.principal.<init>(principal.java:2 0)
at javaapplication1.JavaApplication1.main(JavaApplica tion1.java:21)