分析以下需求，并用代码实现

(1)利用键盘录入，输入一个字符串

	public static void main(String[] args) {
		String str  = inputString();
		Map map = new HashMap<>();
		map = countLetter(str,map);
		printMap(map);

	}

	private static String inputString() {
		System.out.println("请输入一句话：");
		String str = new Scanner(System.in).nextLine();
		return str;
	}

(2)统计该字符串中各个字符的数量

	private static Map countLetter(String str, Map map) {
		char[] array = str.toCharArray();
		Set set = map.keySet();
		for(char c : array){
			if(set.contains(c)){
				map.put(c, map.get(c)+1);
			}else{
				map.put(c, 1);
			}
		}
		return map;
	}

(3)如：
用户输入字符串"If~you-want~to~change-your_fate_I_think~you~must~come-to-the-dark-horse-to-learn-java"

程序输出结果：-(9)I(2)_(3)a(7)c(2)d(1)e(6)f(2)g(1)h(4)i(1)j(1)k(2)l(1)m(2)n(4)o(8)r(4)s(2)t(8)u(4)v(1)w(1)y(3)~(6)

	private static void printMap(Map map) {
		String str="";
		Set set = map.keySet();
		for(char c : set){
			str = str + c +"("+map.get(c)+")";
		}
		System.out.println(str);
	}