java 8 read text file code example

Example 1: java read text file

// how to read text file line by line using FileReader class
import java.io.FileReader;
import java.io.IOException;
public class JavaReadTextFileUsingFileReader
{
   public static void main(String[] args) throws IOException
   {
      FileReader fr = new FileReader("B:\demo.txt");
      int a;
      while((a = fr.read()) != -1)
      {
         System.out.print((char) a);
      }
      fr.close();
   }
}

Example 2: java how to read a text file

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

class Scratch{
    public static void main(String[] args) throws FileNotFoundException {
        Scanner input = new Scanner(new File("filename"));
        input.next();       //returns next String
        input.nextLine();   //returns next Line
        input.nextBoolean();//returns next Boolean
        input.nextInt();    //returns next Int
        input.nextDouble(); //returns next double
        ...
    }
}