2 回答error: class, interface, or enum expected java.util.Arrays;

1 回答HelloWorld.java:34: error: class, interface, or enum expected 是什么意思

2 回答999判斷幾位數(shù)，錯誤提示error: class, interface, or enum expected } ^ 1 error

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

1 回答錯誤提示：HelloWorld.java:26: error: missing return statement } ^ 1 error