arrayList的插入和读取

arrayList的插入和读取
package com.arraylist.test;
import java.util.ArrayList; import java.util.Iterator; import java.util.List;
public class arrayListTest {        public static void main(String args[]) {             List<String> list = new ArrayList<String>();             list.add( "test1");             list.add( "test2");
             // 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("method4" );                   System. out.println(list.get(i));             }                          System. out.println("And then Jim said, who"s at the door" );                                              } }