java中实现Comparable接口实现自定义排序

class Student implements Comparable{
    String name;
    int gpa;
    @Override
    public int compareTo(Object arg0) {
        // TODO Auto-generated method stub
        Student s = (Student)arg0;
        
        if(gpa == s.gpa) return name.compareTo(s.name);
        else if(gpa < s.gpa) return -1;
        else if(gpa > s.gpa) return 1;
        else return 0;
        
    }
    
    
}

class Test {
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        
        int n = in.nextInt();
        
        Student[] s = new Student[n];
        
        for(int i = 0;i < n;i ++){
            s[i] = new Student();
            s[i].name = in.next();
            s[i].gpa = in.nextInt();
        }
        
        Arrays.sort(s);
        
        for (Student ss : s)  
        {  
            System.out.println(ss.name);  
            System.out.println(ss.gpa);  
        }  
    }
}