list转数组，数组转list

import java.util.ArrayList;import java.util.Arrays;import java.util.List;public class Test {public static void main(String[] args) {List<String> list = new ArrayList<String>();list.add("a");list.add("b");list.add("c");//list转数组String[] array = (String[]) list.toArray(new String[list.size()]);//数组转字符串System.out.println(Arrays.toString(array));//数组转listList<String> list2 = new ArrayList<String>();list2 = Arrays.asList(array);System.out.println(list2.toString());}}