Компиляторы 4 лаба (7) Message & Compiler

import java.util.ArrayList;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.*;
import java.lang.*;


public class Message {
    public boolean IsError;
    public String Text;

    public Message (boolean isError, String text) {
        IsError = isError;
        Text = text;
    }
}

public class Compiler {
  
   private SortedMap<Position,Message> messages;

    public Compiler(){
        messages = new TreeMap<Position, Message>();
    }

    public void AddMessage (boolean isErr, Position c, String text) {
        messages.put(c, new Message(isErr,text));
    }

    public void OutputMessages(){
        for(Map.Entry<Position, Message> entry: messages.entrySet()){
            Position key = entry.getKey();
            Message value = entry.getValue();
            System.out.print(value.IsError ? "Error":"Warning");
            System.out.print(" " + key + ": ");
            System.out.println(value.Text);
        }
    }
}