1 回答The one you gave

2 回答what is the point,god?

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

1 回答Exception in thread "main" java.lang.Error: Unresolved compilation problem: The method printf(String, Object[]) in the type PrintStream is not applicable for the arguments (String, double) at MainClass.main(MainClass.java:16) 是什么意思

1 回答Multiple markers at this line - The serializable class HelloWorld does not declare a static final serialVersionUID field of type long - The public type HelloWorld must be defined in its own file - The type HelloWorld is already defined