集合，ArrayList练习

import java.util.ArrayList;
import java.util.Iterator;

public class ArrayListTest {
    public static void main(String[] args) {
        ArrayList<Person> list = new ArrayList<Person>();
          list.add(new Person("wangcai", 21));
          list.add(new Person("zhangsan", 22));
          list.add(new Person("lisi", 23));
          list.add(new Person("zhaoliu", 24));
          list.add(new Person("wangcai", 21));
          list.add(new Person("lisi", 23));
          System.out.println(list);
          list=getNewList(list);
          System.out.println(list);
          singleStringDemo();
    }
    
    public static void singleStringDemo(){
          ArrayList list=new ArrayList();
          list.add("java01");
          list.add("java02");
          list.add("java05");
          list.add("java02");
          list.add("java04");
          list.add("java05");
          list.add("java04");
          System.out.println(list);
          list=getNewList(list);
          System.out.println(list);
    }

    public static ArrayList getNewList(ArrayList list) {
        ArrayList temp = new ArrayList();
        Iterator it = list.iterator();
        while(it.hasNext()) {
            Object obj = it.next();
            if (!temp.contains(obj)) {
                temp.add(obj);
            }
        }
        return temp;
    }
}

public class Person {
    private String name;
    private int age;
    
    public Person() {
        super();
    }

    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 + "]";
    }
    
}