高分悬赏提问，Java语言程序来编写，怎么统计输入的字符串中每个字符出现的频率百分比？

Question

高分悬赏提问，Java语言程序来编写，怎么统计输入的字符串中每个字符出现的频率百分比？

show me your code please

Answer 1

这是我的代码：

package apa;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;

public class Test1
{
public static void main(String[] args) throws IOException
    {
        BufferedReader bufr = new BufferedReader(new InputStreamReader(System.in));
        String str=bufr.readLine();

        HashMap<Character,Integer> map = new HashMap<Character,Integer>();
        int len = str.length();

        for(int i = 0;i<len; i++)
        {
            Character c = str.charAt(i);

            if(map.containsKey(c))
            {
                map.put(c, 1+map.get(c));
            }
            else
            {
                map.put(c, 1);
            }
        }

        for(Map.Entry<Character,Integer> entry:map.entrySet())
        {
            char c = entry.getKey();
            int i = entry.getValue();
            System.out.println(c+": "+(double)i/len);
        }
    }
        }