单例模式实例读取配置文件

请结合单例模式实现基于txt的配置文件的读取。
Txt文件可以自行建立，例如：
1 2003 Spring Soccer League (Spring '03)
2 2003 Summer Summer Soccer Fest 2003
3 2003 Autumn Autumn Soccer League (2003)
4 2004 Spring Soccer League (Spring '04)
5 2005 Summer The Summer of Soccer Love 2005
6 2006 Autumn Autumn Soccer League (2006)

目录结构如下

UML图：

代码：

package 单例模式;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class Read {
        private static Read rt;
        private Read(){
            
        }
        public static synchronized Read getInstance() {
            if (rt==null) {
                rt = new Read();
            }
            return rt;
        }
        public void readTxt(String pathname) {
            try {
                FileReader f = new FileReader(pathname);
                BufferedReader br = new BufferedReader(f);
                String s = br.readLine();
                while(s!=null) {
                    System.out.println(s);
                    s=br.readLine();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
}

package 单例模式;

public class Main {

    public static void main(String[] args) {
                String pathname = Main.class.getResource("1.txt").getPath();
                Read rt = Read.getInstance();
                rt.readTxt(pathname);
    }

}