统计数组中重复元素个数

/*** 循环统计数组或集合中的重复元素个数* @param args*/public static void main(String[] args) {Map<String, Integer> map = new HashMap<String, Integer>();String[] ss = {"白","黑","绿","白"};for (int i = 0; i < ss.length; i++) {if (map.get(ss[i]) != null) {Integer num = (Integer) map.get(ss[i]);num++;map.put(ss[i], num);} else {map.put(ss[i], 1);}}System.out.println(map);}