Question

以下程序报错，请各位大牛帮忙！！！

package org.lxh.Erchashu;

import java.util.Comparator;;

public class StudentComparator implements Comparable<Student> {
//错误1：The type StudentComparator must implement the inherited abstract method Comparable<Student>.compareTo(Student)

public int compare(Student stu1, Student stu2){
if(stu1.getScore()>stu2.getScore()){
return -1 ;
}else if(stu1.getScore()<stu2.getScore()){
return 1 ;
}else{
if(stu1.getAge()>stu2.getAge()){
return 1;
}else if(stu1.getAge()<stu2.getAge()){
return -1 ;
}else{
return 0 ;
}

}
}

public boolean equals(Object obj) {
return this.equals(obj) ;
}

}
//错误2：The method getScore() is undefined for the type Student
The method getAge() is undefined for the type Student

Answer 1

Student类中，没有定义 getScore()方法、没有getAge()方法