java - 关于int比较的返回值问题

Question

            int result = Integer.compare(1,2);
            if(result > 0){
                return -1;
            }else if(result < 0){
                return 1;
            }else if(result == 0) {
                return 0;
            }

这段代码一直报缺少返回值错误，有点想不明白，int不久三种么？ 等于0、大于0、小于0。还有其他情况么？

Answer 1

The compiler has no human wisdom!
Write like this:

            int result = Integer.compare(1,2);
            if(result > 0){
                return -1;
            }else if(result < 0){
                return 1;
            }else{
                return 0;
            }

Ensure that all branches are complete, so that the compiler will think that all branches have been processed! hehe.

Answer 2

Because you don’t have else