[求助]着是什么编译错误
java.lang.NullPointerException at MenuFrame.<init>(Asss.java:56) at Asss.main(Asss.java:10) Exception in thread "main"
谢谢
java.lang.NullPointerException at MenuFrame.<init>(Asss.java:56) at Asss.main(Asss.java:10) Exception in thread "main"
谢谢