Question

如果没有先关闭我的BufferedWriter，我如何访问文件中的数据？

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;


public class Tp {
    public static void main(String[] args) throws IOException{
        File f = new File("Store.txt");
        BufferedWriter bw = new BufferedWriter(new FileWriter(f));
        BufferedReader br = new BufferedReader(new  FileReader(f));
        bw.write("Some text");
        System.out.println(br.readLine());
        bw.write("Some more text");
        bw.close();
        br.close();
    }
}

控制台显示为null。我该如何解决这个问题？

Answer 1

你还没有刷新流

public class Tp {
  public static void main(String[] args) throws IOException{
    File f = new File("/path/to/your/file/filename.txt");
    BufferedWriter bw = new BufferedWriter(new FileWriter(f));
    BufferedReader br = new BufferedReader(new  FileReader(f));
    bw.write("Some text");
    bw.flush();
    System.out.println(br.readLine());
    bw.write("Some more text");
    bw.flush();
    bw.close();
    br.close();
  }
}

在java中同时读取和写入同一个文件

1 个答案: