数组和List 互相转换 List to Array
数组和List 相互转换, 可以是任意类型的数组
package com.ljc.java.list;import org.junit.Test;import java.util.*;import static org.junit.Assert.assertEquals;/** * Created with IntelliJ IDEA. * User: Liu_jc * Date: 13-6-20 * Time: 上午9:59 * To change this template use File | Settings | File Templates. */public class ListToArrayTest { private String[] strArray = {"aa", "bb", "cc"}; @Test public void testListArray() throws Exception { // Array to List List<String> list = Arrays.asList(strArray); assertEquals(strArray.length, list.size()); assertEquals("aa", list.get(0)); assertEquals(strArray[0], list.get(0)); // List to Array String[] newStrArray = list.toArray(new String[]{}); assertEquals(list.size(), newStrArray.length); assertEquals("aa", list.get(0)); }}