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标题: 这个错误 [打印本页]

作者: 李春生 时间: 2012-11-20 11:57
标题: 这个错误
本帖最后由李春生于 2012-11-20 14:30 编辑

import java.util.*;

class Person
{
      private String name;
      private int age;
      Person(String name, int age)
      {
         this.name = name;
            this.age = age;
      }
public boolean equals(Object obj)
      {
            System.out.println(obj);
            if(!(obj instanceof Person))
                     return false;

            Person p = (Person)obj;

            return this.name.equals(p.name) && this.age == p.age;

      }
      public String getName()
      {
            return name;
      }

      public int getAge()
      {
         return age;
      }
}

class ArrayListTest2
{
public static void sop(Object obj)
      {
            System.out.println(obj);
      }

      public static void main(String[] args)
      {
            ArrayList a1 = new ArrayList();

            a1.add(new Person("yuanfang01",25));
            a1.add(new Person("yuanfang01",25));
            a1.add(new Person("yuanfang02",24));
            a1.add(new Person("yuanfang02",24));
            a1.add(new Person("yuanfang03",23));
            a1.add(new Person("yuanfang04",21));

            a1 = singleElement(a1);

            Iterator it = a1.iterator();

            while(it.hasNext())
            {

                     Person p = (Person)it.next();
                     sop(p.getName()+"::"+p.getAge());

            }
      }
}
红色部分为什么不通过

搜狗截图_2012-11-20_14-30-31.png (3.65 KB, 下载次数: 12)