student.java

学生分数排列

/**
 * This class represents a student. Contains name, ID, and grade.
 */
public class Student implements Comparable<Student>{
    private String name;
    private int id;             // Could also use String instead of int
    private int grade;          // 0..100

    public Student(String name, int id, int grade) {
        this.name = name;
        this.id = id;
        this.grade = grade;
    }

    public String toString() {
        return String.format("%07d %-12s grade %3s", id, name, grade);
    }
    
    public int compareTo(Student s){
    	if (this.id == s.id) return 0;
        if (this.id > s.id) return -1;
        return 1;
    }
}