Question

未对参数类型java.lang.String,java.lang.String定义运算符>

public class Humanbeing implements Comparable{
static String [] birthArray=new String[3];
String age =birthArray[0];
private String birth;
public int compareTo(Object obj){
if(!(obj instanceof Humanbeing)) return 1;
Humanbeing s=(Humanbeing)obj;
if(this.getbirth()>s.getbirth()) return 1;
if(this.getbirth()<s.getbirth()) return -1;
return 0;
}
public String getbirth() {
return birth;
}
.......
应该怎么更改？

Answer 1

String类对象哪能用<>比较大小啊。。
把birth直接换成int类型的age不好么。。