统计字符串中各个字符出现的个数

 

import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Scanner;


public class CharCount {

	/**
	 * @param args
	 */
	public static void main(String[] args) {

		Map map = new LinkedHashMap();//保证与输入顺序一致
		String input = new Scanner(System.in).nextLine();
		char[] arr = input.toCharArray();
		int length = input.length();
		for(int i=0;i<length;i++){
			if(!(map.keySet().contains(arr[i]))){
				map.put(arr[i], 1);
			}
			else{
				map.put(arr[i], (Integer)(map.get(arr[i]))+1);
			}
		}
		Iterator<Map.Entry<Character,Object>> itr = map.entrySet().iterator();
		while(itr.hasNext()){
			Map.Entry<Character,Object> entry = itr.next();

			System.out.println(entry.getKey()+":"+entry.getValue());
		}
	}

}