Question

我试图制作两个能够读写文本文件的对象。执行程序时会出现问题。文本文件被删除。为什么会发生这种情况？如何解决这个问题？

CODE：

读取文本文件的对象：

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

    public class Reader {

        public static String fromFile;
        public static FileReader fr;
        public static BufferedReader file;

        public Reader(String fileName) throws IOException, FileNotFoundException {
            fr = new FileReader(fileName);
            file = new BufferedReader(fr);
        }

        public void readFile() throws IOException {
            while((fromFile = file.readLine()) != null) {
                System.out.println(fromFile);
            }
        }

    }

要写入文本文件的对象：

    import java.io.BufferedWriter;
    import java.io.FileNotFoundException;
    import java.io.FileWriter;
    import java.io.IOException;

    public class Writer {

        public static FileWriter fw;
        public static BufferedWriter file;

        public Writer(String fileName) throws IOException, FileNotFoundException {
            fw = new FileWriter(fileName);
            file = new BufferedWriter(fw);
        }

    }

创建Reader和Writer对象并使用Reader读取文本文件的主要方法：

    import java.io.IOException;

    public class Main {

        public static Writer toFile;
        public static Reader fromFile;
        public static String fileName = "test123.txt";

        public static void main(String[] args) throws IOException  {

            toFile = new Writer(fileName);
            fromFile = new Reader(fileName);

            fromFile.readFile();
        }

    }

Answer 1

这只是我的建议。

  import java.io.*;

    public class Main {

        public static void main(String[] args) throws IOException  {
            public static String fileName = "test123.txt";
            Read rd=new Read();
            rd.reader(filename);
        }

    }

public class Read
{ 
        public void reader(String filename)
       {
        FileReader fr=new FileReader(filename);
        BufferedReader bfr=new BufferedWriter (fr);
        String text="";
        String line=reader.readLine();
        while(line!=null)
        {
            text+=line;
            line=reader.readLine();
        } 
        System.out.println(text);

       }
   fr.close();
   bfr.close();
}

我尝试使用Java读取文本文件，但在程序执行时会被删除

1 个答案: