example13_7.java

不错的教程 适合中高级人员的使用

import java.util.*;import java.awt.*;
class Example13_7
{public static void main(String args[])
 { TreeSet mytree=new TreeSet(new Comparator()
   {public int compare(Object a,Object b)
    {Student stu1=(Student)a;Student stu2=(Student)b;
     return stu1.compareTo(stu2);}
   });
   Student st1,st2,st3,st4;
   st1=new Student(90,"赵一");st2=new Student(66,"钱二");
   st3=new Student(86,"孙三");st4=new Student(76,"李四");
   mytree.add(st1);mytree.add(st2);mytree.add(st3);mytree.add(st4);
   Iterator te=mytree.iterator();
   while(te.hasNext())
    {Student stu=(Student)te.next();
     System.out.println(""+stu.name+"  "+stu.english);
     }
  }
}
class Student  implements Comparable 
{ int english=0;String name;
 Student(int e,String n)
 {english=e;name=n;
 }
 public int compareTo(Object b)
 { Student st=(Student)b;
   return (this.english-st.english);
 }
}