Advanced Java Programming - Old Questions

8. Write a simple java program to read from and write to files.

Let us suppose we have a file named “test.txt” in D-drive. Now we first read from this file character-by-character and later we write the contents of this file to another file say “testwrite.txt” in E-drive. For these tasks, we use the character stream classes namely FileReader and FileWriter. The code is given below:

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

public class FileReadWrite {

  public static void main(String []args) {

  try

  {

    FileReader fr = new FileReader("D:\\\\test.txt");

    FileWriter fw = new FileWriter("E:\\\\testwrite.txt");

    int c;

    while((c=fr.read())!=-1) {

      fw.write(c);

      System.out.print((char)c);

    }

    fr.close();

    fw.close();

  }

  catch (IOException ex)

  {

    ex.printStackTrace();

  }

 }

}