在用java swing 做例子，给页面设置皮肤样式的时候出现了这个错误：
org.jvnet.substance.api.UiThreadingViolationException: Component creation must be done on Event Dispatch Thread
at org.jvnet.substance.utils.SubstanceCoreUtilities.testComponentCreationThreadingViolation(SubstanceCoreUtilities.java:2368)
at org.jvnet.substance.SubstancePanelUI.createUI(SubstancePanelUI.java:57)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:36)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:243)
at javax.swing.UIDefaults.getUI(UIDefaults.java:751)
at javax.swing.UIManager.getUI(UIManager.java:1016)
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.java:527)
at javax.swing.JRootPane.<init>(JRootPane.java:347)
at javax.swing.JFrame.createRootPane(JFrame.java:260)
at javax.swing.JFrame.frameInit(JFrame.java:241)
at javax.swing.JFrame.<init>(JFrame.java:164)
at com.chat.frame.ClientLoginFrame.<init>(ClientLoginFrame.java:52)
at com.chat.frame.ClientLoginFrame.main(ClientLoginFrame.java:241)
后来查了很多资料，发现是由于swing 的线程不安全引起的，
解决方案如下：
在main方法里，程序的主入口加上：
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new ClientLoginFrame().setVisible(true); //这个就是程序界面初始化
}
});
这样问题就解决。