求给定字母字符串中字母出现最多的字母和出现的次数

求给定字母字符串中字母出现最多的字母和出现的次数

package test;

import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;

public class FindFrequent {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		String str = "bbbbbaassscddffaabbb";
		Map<Character,Integer> map = new HashMap<Character,Integer>();
		char temp;
		for(int i=0;i<str.length();i++){
			temp = str.charAt(i);
			if(map.containsKey(temp)){
//				map.put(temp, Integer.parseInt(map.get(temp).toString())+1);
				map.put(temp, map.get(temp)+1);
			}else{
				map.put(temp, 1);
			}
		}
		//遍历map
		Iterator it = map.entrySet().iterator();
		while(it.hasNext()){
			Entry entry = (Entry) it.next();
			System.out.println("key="+entry.getKey()+" "+"value="+entry.getValue());
		}
		//Collections.max(Collection )方法用于得到所给参数中的最大值
		int charMaxIndex =  (Integer) Collections.max(map.values());
		Set<Character> maxSet = new HashSet<Character>();
		for(Entry<Character,Integer> entry1 :map.entrySet()){
			if(entry1.getValue().equals(charMaxIndex)){
				maxSet.add(entry1.getKey());
			}
		}
		
		System.out.println("出现次数最多的字母是："+maxSet);
		System.out.println("出现次数最多的字母的次数是："+charMaxIndex);
		
	}

}