【华为上机题 哈尔滨站】统计0-9数码组成的字符串中出现次数最多的数码

package com.quanqiuwang.base.action;


import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

/**
 * @描述：统计0-9数码组成的字符串中出现次数最多的数码
 * @部门：研发部
 * @作者：马铁利
 * @创建时间：2012-10-11 上午9:29:48
 */
public class Test {
	public static void main(String[] args) {
		CountChar("01234567895463215487956321401020000255555555555");
	}

	public static void CountChar(String str) {
		if (str != null && str.length() > 0) {
			char[] cs = str.toCharArray();
			Map<Character,Integer> map=new HashMap<Character,Integer>();
			for(Character c : cs){
				if(map.containsKey(c)){
					map.put(c, (Integer)map.get(c)+1);
				}else{
					map.put(c, 1);
				}
			}
			System.out.println(map);
			Set<Character> keyset=map.keySet();
			Iterator<Character> iter = keyset.iterator();  
			Integer count=0; 
			Character key = new Character(' ');  
		      
		    while(iter.hasNext()){  
		        Character ccc = (Character)iter.next();  
		        if(map.get(ccc) > count){  
		            count = map.get(ccc);  
		            key = ccc;  
		        }  
		    }  
		    System.out.println("【"+key.toString()+"】出现的次数最多，出现了"+ count+"次");  
		}
	}
}