去除ArrayList中重复自定义对象元素

/*
 * 自定义对象Person类
 */
 4     public class Person {
    private String name;
    private int age;

    public Person(String name, int age) {
        super();
        this.name = name;
        this.age = age;
    }

    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;
    }

    @Override
    public String toString() {
        return "Person [name=" + name + ", age=" + age + "]";
    }

    @Override
    public boolean equals(Object obj) {//重写equals方法
        Person per = (Person) obj;
        if (per.getName().equals(this.name) && per.getAge() == this.age) {
            return true;
        }
        return false;
    }

}

 //方式一:
 1 import java.util.ArrayList;
import java.util.ListIterator;

import com.heima.bean.Person;

/*
* 需求：ArrayList去除集合中自定义对象元素的重复值(对象的成员变量值相同)
* 思路: 重写equals()方法
*/
    public class Demo2_ArrayList {
    public static void main(String[] args) {
        ArrayList<Person> list = new ArrayList<Person>();
        list.add(new Person("张三", 23));
        list.add(new Person("李四", 24));
        list.add(new Person("王五", 25));
        list.add(new Person("赵六", 26));
        list.add(new Person("张三", 23));
        list.add(new Person("李四", 24));
        list.add(new Person("赵六", 26));
        System.out.println(getSingle(list));
    }

    public static ArrayList<Person> getSingle(ArrayList<Person> list) {
        ArrayList<Person> newArrayList = new ArrayList<Person>();
        ListIterator<Person> iter = list.listIterator();
        while (iter.hasNext()) {
            Person per = (Person) iter.next();
            if (!newArrayList.contains(per)) {//contains方法判断是否包含,底层依赖equals方法
                newArrayList.add(per);          //remove方法判断是否删除,底层依赖的也是equals方法
            }
        }

        return newArrayList;

    }

}

//方式二:
public class ArrayList_Demo {
    public static void main(String[] args) {
        ArrayList<Person> list = new ArrayList<>();
        list.add(new Person("张三", 23));
        list.add(new Person("李四", 24));
        list.add(new Person("王五", 25));
        list.add(new Person("赵六", 26));
        list.add(new Person("张三", 23));
        list.add(new Person("李四", 24));
        single(list);
        System.out.println(list);
    }

    public static void single(List<Person> list) {
        HashSet<Person> hash = new HashSet<>();
        hash.addAll(list);
        list.clear();
        list.addAll(hash);
    }

}