[Java] BufferedReader/BufferedWriter 缓冲读取和写入字符

import java.io.*;
public class CopyFileTest3{
    public static void main(String[] args) throws IOException {
        FileReader fr = new FileReader("1.txt");
        BufferedReader br = new BufferedReader(fr);
       
        FileWriter fw = new FileWriter("2.txt");
        BufferedWriter bw = new BufferedWriter(fw);
       
        String read =  br.readLine();
        while(read!=null){
             bw.write(read);
             bw.newLine();
             read = br.readLine();
        }
        br.close();
        bw.flush();
        bw.close();
       
    }
}
//BufferedReader/BufferedWriter的读写速度比其它的都快