Program to create text file, write some data and read the same using single character method without using string functions

 In this tutorial, you'll learn how to create TEXT file, write some data to file and read the data from text file.

Before going to start you should aware of the following concepts:

• Java File IO
• FileWriter class
• FileReader class

PROGRAM

import java.io.*;
import java.util.Scanner;

public class TextFileCreateWriteReadData {
	
  public static void main(String args[]) {
    
    try { 
      
      File f = new File("demo.txt");
      
      // Step 1 - Create a TEXT file
      f.createNewFile();
      System.out.println("TEXT file created successfully !!!\n");
      
      // Step 2 - Write to TEXT file
      Scanner scan = new Scanner(System.in);
      System.out.println("Enter some text to write into file ==>");
      String data = scan.nextLine();
            
      FileWriter fw = new FileWriter("demo.txt");   // Creates a FileWriter object
      fw.write(data);
      fw.flush();
      fw.close();
      
      // Step 3 - Read data from TEXT file
      FileReader fr = new FileReader("demo.txt");   // Creates a FileReader object
      char x[] = new char[30];
      fr.read(x);    // Reads the contents to array
      
      System.out.println("\n\nReading data from TEXT file....");
      for(char c : x) {
        System.out.print(c);  // Print character one by one
      }
      
      fr.close();
    }
    catch(IOException ioe) {
      System.out.println(ioe);
    }
  }
}

OUTPUT

C:\>javac TextFileCreateWriteReadData.java
C:\>java TextFileCreateWriteReadData 

TEXT file created successfully !!!

Enter some text to write into file ==>
Hello I am Rahul


Reading data from TEXT file....
Hello I am Rahul