1 回答Watch is 字符

2 回答what is the point,god?

1 回答Description Resource Path Location Type Resource leak: 'input' is never closed

3 回答The operator - is undefined for the argument type(s) String, int 是什么錯誤？

2 回答HelloWorld.java:1: error: class HellWorld is public, should be declared in a file named HellWorld.java public class HellWorld{ ^ 1 error