在eclipse 无法实例化是什么原因
载入:无法实例化 mainFrame.class。
java.lang.InstantiationException: mainFrame
at java.lang.Class.newInstance0(Class.java:335)
at java.lang.Class.newInstance(Class.java:303)
at sun.applet.AppletPanel.createApplet(AppletPanel.java:710)
at sun.applet.AppletPanel.runLoader(AppletPanel.java:639)
at sun.applet.AppletPanel.run(AppletPanel.java:319)
at java.lang.Thread.run(Thread.java:595)