读取数据报错误

package org.example.guessdigit;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

import org.example.io.FileIO;

public class Settings {
	public final static String file = ".GuessDigit";
	public final static int[][] highscores = new int[3][5];
	public final static String[][] players = new String[][]{
		{"player", "player", "player", "player", "player"},
		{"player", "player", "player", "player", "player"},
		{"player", "player", "player", "player", "player"},
	};
	
	public static void load(FileIO files){
		BufferedReader in = null;
		
		try{
			in = new BufferedReader(new InputStreamReader(files.readFile(file)));
			
			// 读取分数
			for(int i = 0; i < 3; i++){
				for(int j = 0; j < 5; j++){
					highscores[i][j] = Integer.parseInt(in.readLine());
				}
			}
			// 读取玩家
			for(int i = 0; i < 3; i++){
				for(int j = 0; j < 5; j++){
					players[i][j] = in.readLine();
				}
			}
		}catch(IOException ex){
			ex.printStackTrace();
		}catch(NumberFormatException e){  //load方法里会有NumberFormatException
			e.printStackTrace();
		}finally{
			try{
				if(in != null)
					in.close();
			}catch(IOException e){
			}
		}
	}
	
	public static void save(FileIO files){
		BufferedWriter out = null;
		try{
			out = new BufferedWriter(new OutputStreamWriter(
					files.writeFile(file)));
			for(int i = 0; i < 3; i++){
				for(int j = 0; j < 5; j++){
					out.write(highscores[i][j]);
					out.write("\n");
				}
			}
			for(int i = 0; i < 3; i++){
				for(int j = 0; j < 5; j++){
					out.write(players[i][j]);
					out.write("\n");
				}
			}
		}catch(IOException ex){
			ex.printStackTrace();
		}finally{
			try{
				if(out != null)
					out.close();
			}catch(IOException e){
			}
		}
	}
	
	public static void addScore(int diff, String player, int score){
		for(int i = 0; i < 5; i++){
			if(score > highscores[diff - 3][i]){
				for(int j = 4; j > i; j--){
					highscores[diff - 3][j] = highscores[diff - 3][j - 1];
					players[diff - 3][j] = players[diff - 3][j - 1];
				}
				highscores[diff - 3][i] = score;
				players[diff - 3][i] = player;
				break;
			}
		}
	}
}

Settings.addScore(diff, player, score);
Settings.save(file);
Setting.load(file);  // load方法里会有NumberFormatException