判断输入的一行字符串中出现次数最多的字母

ゝ一纸荒年。 2022-08-10 15:51 222阅读 0赞

import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.util.Collection;
    import java.util.HashMap;
    import java.util.Iterator;
    import java.util.Map;
    import java.util.Set;
    
    
    public class CheckString 
    {
    	public static void main(String args[])
    	{
    		String read=null;
    		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
    		try 
    		{
    			read=br.readLine();
    		} 
    		catch (IOException e)
    		{
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
    		
    		Map map=new HashMap();
    		char c=' ';
    		
    		for(int i=0;i<read.length();i++)
    		{
    			c=read.charAt(i);
    			if(map.containsKey(c))
    			{
    				map.put(c, new Integer(((Integer)map.get(c)).intValue()+1));
    			}
    			else
    			{
    				map.put(c, 1);
    			}
    		}
    		Collection<Integer> col=map.values();
    		Iterator<Integer> ite=col.iterator();
    		int max=0;
    		while(ite.hasNext())
    		{
    			int k=ite.next();
    			if(max<k)
    			{
    				max=k;
    			}
    		}
    		System.out.println("输入的字符串中字母最多出现"+max+"次!");
    		
    		Set set=map.entrySet();
    		Iterator<Map.Entry<Character, Integer>> i=set.iterator();
    		Map.Entry<Character, Integer> entry;
    		while(i.hasNext())
    		{
    			entry=i.next();
    			if(entry.getValue()==max)
    			{
    				System.out.println("出现最多次数的字母有"+entry.getKey());
    			}
    		}
    	}
    }