import java.util.*;
[code]import java.util.*;
class StuScoreSort 
{
        public static void main(String[] args)
        {
                Student stu1 = new Student("成龙",28,100);
                Student stu2 = new Student("李连杰",32,95);
                Student stu3 = new Student("洪金宝",35,92);
                Student stu4 = new Student("杨紫琼",25,88);
                Student stu5 = new Student("元奎",36,83);
                ArrayList<Student> list = new ArrayList<Student>();
                list.add(stu1);
                list.add(stu2);
                list.add(stu3);
                list.add(stu4);
                list.add(stu5);
                Collections.sort(list,new MyComparator());
                Iterator<Student> it = list.iterator();
                while(it.hasNext())
                {
                        Student s = it.next();
                        System.out.println(s.getName()+","+s.getAge()+","+s.getScores());
                }
        }
}

class Student
{
        private String name;
        private int age;
        private int scores;
        Student()
        {}
        Student(String name,int age,int scores)
        {
                this.name = name;
                this.age = age;
                this.scores = scores;
        }
        public void setName(String name)
        {
                this.name = name;
        }
        public void setAge(int age)
        {
                this.age = age;
        }
        public void setScroes(int scores)
        {
                this.scores = scores;
        }
        public String getName()
        {
                return name;
        }
        public int getAge()
        {
                return age;
        }
        public int getScores()
        {
                return scores;
        }
}
class MyComparator implements Comparator
{
        public int compare(Object o1,Object o2)
        {
                Student s1 = (Student)o1;
                Student s2 = (Student)o2;
                if(s1.getScores()<s2.getScores())
                        return -1;
                else if(s1.getScores()==s2.getScores())
                        return 0;
                else
                        return 1;
        }
}

class MyComparator implements Comparator<Student> {
  
  @Override
  public int compare(Strudent s1, Student s2) {
  
    // ...
  }
}

------解决方案--------------------
class MyComparator implements Comparator
{
       public int compare(Object o1,Object o2)
       {
               Student s1 = (Student)o1;
               Student s2 = (Student)o2;



class MyComparator implements Comparator<Student> {

	public int compare(Student o1, Student o2) {
		Student s1 = o1;
		Student s2 = o2;