怎么去掉String数组中的空值，形成新的String数组

String[] aa = {"","","ddd","","asdf" };        List<String> tmp = new ArrayList<String>();        for(String str:aa){            if(str!=null && str.length()!=0){                tmp.add(str);            }        }        aa = tmp.toArray(new String[0]);
------解决方案--------------------
Java code
public class Arr {    public static void main(String[] args) {        String[] aa = {"","","ddd","","asdf"};                //用StringBuffer来存放数组中的非空元素，用“;”分隔        StringBuffer sb = new StringBuffer();        for(int i=0; i<aa.length; i++) {            if("".equals(aa[i])) {                continue;            }            sb.append(aa[i]);            if(i != aa.length - 1) {                sb.append(";");            }        }        //用String的split方法分割，得到数组        aa = sb.toString().split(";");                //打印数组        for(int i=0; i<aa.length; i++) {            System.out.print(aa[i] + " ");        }        System.out.println();    }}