Several methods of ArrayList output

Several methods of ArrayList output! ! !

 

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
 
public class ArrayList1 {
    public static void main(String args[]) {
        List<String> list = new ArrayList<String>();
        list.add("AAA");
        list.add("BBB");
        // 方法1
        Iterator it1 = list.iterator();
        while (it1.hasNext()) {
            System.out.println(it1.next());
        }
        // 方法2
        for (Iterator it2 = list.iterator(); it2.hasNext();) {
            System.out.println(it2.next());
        }
        // 方法3
        for (String tmp : list) {
            System.out.println(tmp);
        }
        // 方法4
        for (int i = 0; i < list.size(); i++) {
            System.out.println(list.get(i));
        }
    }
}

 

 

 

Turn: https://blog.csdn.net/basycia/article/details/51862125