import java.util.ArrayList;

import java.util.Iterator;

public class StringSampleDemo {

    public static void main(String[] args) {

        ArrayList al = new ArrayList();

        al.add(new Student("zhangsan1", 20, "男"));

        al.add(new Student("zhangsan1", 20, "男"));

        al.add(new Student("lilin1", 21, "女"));

        al.add(new Student("lilin1", 21, "女"));

        al.add(new Student("lisi", 25, "男"));

        al = getUniqueList(al);

        for (Object o : al) {

            Student s = (Student) o;

            System.out.println(s.getName() + "...." + s.getAge() + "...." + s.getSex());

        }

        /** 去重后的集合数据

         *

         * zhangsan1....20....男

         * lilin1....21....女

         * lisi....25....男

         */

    }

    /**

     * 去除重复对象

     *

     * @param al

     * @return

     */

    public static ArrayList getUniqueList(ArrayList al) {

        ArrayList tempAl = new ArrayList();

        Iterator it = al.iterator();

        while (it.hasNext()) {

            Object obj = it.next();

            if (!tempAl.contains(obj)) //不存在则添加

            {

                tempAl.add(obj);

            }

        }

        return tempAl;

    }

}

class Student {

    private String name;

    private int age;

    private String sex;

    public Student(String name, int age, String sex) {

        this.name = name;

        this.age = age;

        this.sex = sex;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public int getAge() {

        return age;

    }

    public void setAge(int age) {

        this.age = age;

    }

    public String getSex() {

        return sex;

    }

    public void setSex(String sex) {

        this.sex = sex;

    }

    /**

     * 重点是重写比较方法

     *

     * @param obj

     * @return

     */

    @Override

    public boolean equals(Object obj) {

        if (obj instanceof Student) {

            Student s = (Student) obj;

            return this.name.equals(s.name) && this.age == s.age && this.sex.equals(s.sex);

        } else {

            return false;

        }

    }

}