Ich weiß nicht weiter!
package de.codegym.task.task18.task1803;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Map.Entry;
import java.util.TreeMap;
import java.util.ArrayList;
/*
Die häufigsten Bytes
*/
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
FileInputStream inStream = new FileInputStream(reader.readLine());
TreeMap<Integer, Integer> tm = new TreeMap<>();
while (inStream.available() > 0)
{
int data = inStream.read();
int a = 0;
tm.put(data, a);
}
inStream.close();
for(Entry<Integer,Integer> paar : tm.entrySet())
{
for(int i=-127;i<128;i++)
{
if(paar.getKey().equals(i))
{
int x= +1;
tm.put(paar.getKey(),x);
}
}
System.out.print(paar.getValue()+" ");
}
}
}