怎么动态创建数组

如何动态创建数组
String str[]={"asd","1sdf","sfe","asd","ddd","sss","ddd","sss","wer","erw"};也就是如何将这个数组中的不同值取出来并保存。这个str的长度并不确定。每取出一个值先判断是否相同，相同的放在一起，不同的有多少个则创建多少个数组保存。

[解决办法]
总觉得这需求好怪。。。。
打印结果：
[1sdf]
[asd, asd]
[ddd, ddd]
[erw]
[sfe]
[sss, sss]
[wer]

Java code

    public static void main(String[] args) {        String str[] = { "asd", "1sdf", "sfe", "asd", "ddd", "sss", "ddd", "sss", "wer", "erw" };        Set<String> set = new HashSet<String>();        Map<String, Integer> map = new TreeMap<String, Integer>();        for (String s : str) {            if (set.add(s)) {                map.put(s, 1);            } else {                map.put(s, map.get(s) + 1);            }        }        int size = map.size();        int i = 0;        String[][] result = new String[size][];        for (String key : map.keySet()) {            if (map.get(key) == 1) {                result[i] = new String[] { key };            } else {                result[i] = new String[map.get(key)];                for (int j = 0; j < map.get(key); j++) {                    result[i][j] = key;                }            }            i++;        }        for (String[] s : result) {            System.out.println(Arrays.toString(s));        }    }