[javac] (use -source 5 or higher to use 'enum' as a keyword)枚举:警告:从发行版5开始,‘_PrototypeSoapStub.java:30’是一个关键字,m[javac] oper.setUse^
[javac] (use -source 5 or higher to use
import java.util.*;class new public static void main(String[] args) System.out.println("the number is " + a);
} 它在第3行抛出一个标识符错误new.java:3: error: <identifier> expected