http://gwh-08.iteye.com/blog/1233401/

 

class Foo implements Comparable
     
      {        @Override    public int compareTo(ClientPortalButton o) {        return this.i.compareTo(o.getI());    }}
     

 学习了：http://blog.csdn.net/veryisjava/article/details/51675036

可以使用匿名类直接进行排序

public static void main(String[] args) {          List
     
       students = new ArrayList
      
       ();          students.add(new Students(23, 100));          students.add(new Students(27, 98));          students.add(new Students(29, 99));          students.add(new Students(29, 98));          students.add(new Students(22, 89));          Collections.sort(students, new Comparator
       
        () {                @Override              public int compare(Students o1, Students o2) {                  int i = o1.getScore() - o2.getScore();                  if(i == 0){                      return o1.getAge() - o2.getAge();                  }                  return i;              }          });          for(Students stu : students){              System.out.println("score:" + stu.getScore() + ":age" + stu.getAge());          }  }