java 字符串，字符数组，list间的转化

1.关于java.lang.string.split

       xxx.split()方法可以将一个字符串分割为子字符串，然后将结果作为字符串数组返回。


2.字符串转字符数组

      String str =" aa.png,a2.png,a3.png";

      String[] arrayStr =new String[]{};

      arrayStr = str.split(",");


3.字符数组转list

       List list = java.util.Arrays.asList(arrayStr);


4.list转化为字符数组

       String[] storeStr = list.toArray(new String[list.size()]);

public class SplitTest {

    public static void main(String args[]) {

        String str = "a1.png,a2.png,a3.png";// 原始字符串
        String[] arrayStr = new String[] {};// 字符数组
        List<String> list = new ArrayList<String>();// list

        arrayStr = str.split(",");// 字符串转字符数组
        list = java.util.Arrays.asList(arrayStr);// 字符数组转list
        String[] storeStr = list.toArray(new String[list.size()]);// list转成字符数组

        /* 输出字符数组的值 */
        for (String s : arrayStr) {
            System.out.println(s);

        }
        System.out.println("-------------");
        /* 输出list值 */
        for (String s : list) {
            System.out.println(s);

        }
        System.out.println("-------------");

        for (String s : storeStr) {
            System.out.println(s);

        }
        System.out.println("-------------");
    }
}