JavaSE ArrayList

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

public class ArrayListDemo {
    public static void main(String[] args) {
        ArrayList<String> a1 = new ArrayList<String>();
        a1.add("李渊");
        a1.add("李世民");
        //移除元素
        a1.remove("李渊");
        //取出元素
        String s = a1.get(0);
        //遍历元素
        for(int i = 0 ; i < a1.size() ; i ++) {
            System.out.println(a1.get(i));
        }
        //for each
        for(String s1 :a1) {
        System.out.println(s1);
        }
        //迭代器
        Iterator<String> s2 = a1.iterator();
        while (s2.hasNext()){
            System.out.println(s2.next());
        }
        //判断是否有某个元素
        boolean b = a1.contains("李世民");
        System.out.println(b);
    }
}