public String[] sort(String[] str_Array) {
        if(str_Array==null) {
            throw new NullPointerException("The str_Array can not be null!");
        }
        String tmp = "";
        for(int i=0;i<str_Array.length;i++) {
            for(int j=0;j<str_Array.length-i-1;j++) {
                if(str_Array[j].compareTo(str_Array[j+1])<0) {
                    tmp = str_Array[j];
                    str_Array[j] = str_Array[j + 1];
                    str_Array[j + 1] = tmp;
                }
            }
        }
        return str_Array;
    }