Java_基础—ArrayList存储字符串和自定义对象并遍历泛型版

package com.soar.generic;

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

import com.soar.bean.Person;

public class Demo2_Generic {
/*
 *  * A:案例演示
    * ArrayList存储字符串并遍历泛型版
 */
    public static void main(String[] args) {
        //generic_String();
        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));

        Iterator<Person> it = list.iterator();
        while(it.hasNext()){
            //System.out.println(it.next());
            Person p = it.next();       //将集合中的每一个元素用Person记录
            System.out.println(p.getName()+"..."+p.getAge());
        }

    }

private static void generic_String() {
    ArrayList<String> list = new ArrayList<>();
    list.add("a");
    list.add("b");
    list.add("c");
    list.add("d");

    //list.add(true);   加了泛型限制，只能添加String

    Iterator<String> it = list.iterator();
    while(it.hasNext()){
        System.out.println(it.next());
    }
}

}