Exception in thread "main" java.lang.NullPointerException
at java.awt.Container.addImpl(Container.java:1015)
at java.awt.Container.add(Container.java:899)
at mytable.<init>(mytable.java:70)
at mytable.main(mytable.java:149)
这个问题该如何解决呀?谢谢了!!!!!!
...全文
1375打赏收藏
求助
Exception in thread "main" java.lang.NullPointerException at java.awt.Container.addImpl(Container.java:1015) at java.awt.Container.add(Container.java:899) at mytable.(mytable.java:70) at mytable.main(mytable.java:149) 这个问题该如何解决呀?谢谢了!!!!!!