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" );

            

            

            

      }

}