JAVA错误：Exception in thread "main" java.lang.NullPointerException
例如：
Exception in thread "main" java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(Unknown Source)
at chuangti.Example1.CreateJFrame(Example1.java:41)
at chuangti.Example1.main(Example1.java:84)
解答
java.lang.NullPointerException //即指针指向为空
at javax.swing.ImageIcon.<init>(Unknown Source) //为空的区域
at chuangti.Example1.CreateJFrame(Example1.java:41) //41行
at chuangti.Example1.main(Example1.java:84) //84行