关于SET的小问题
import java.util.*;
class TextSet
{
public static void main(String [] args)
{
HashSet<Student> h=new HashSet<Student>();
h.add(new Student(2,"aaa"));
h.add(new Student(2,"aaa"));
h.add(new Student(1,"LHX"));
Iterator i=h.iterator();
while(i.hasNext())
System.out.println(i.next());
}
}
class Student
{
int num;
String name;
Student(int num,String name)
{
this.num=num;
this.name=name;
}
public String toString()
{
return num+":"+name;
}
public int hashcode()
{
return num*(name.hashCode());
}
public boolean equals(Object o)
{
Student s=(Student)o;
return (num==s.num)&&(name.equals(s.name));
}
}
帮忙看看哪错了.怎么还有重复的元素呢!