JAVA中对String数组根据字符长度进行分组并且排序答:好像也很复杂...String[] str = {"1", "2", "3", "66", "54", "513", "323", "12", "121"};Map<Integer, List<String>> map = new HashMap<Integer, List<String>>(); //按照长度区分数据Set<Integer> indexSet = new HashSet<Integer>(); //长度去重for (String string...