java input data from a txt file code example

Example 1: java read file text

try(BufferedReader br = new BufferedReader(new FileReader("file.txt"))) {
    StringBuilder sb = new StringBuilder();
    String line = br.readLine();

    while (line != null) {
        sb.append(line);
        sb.append(System.lineSeparator());
        line = br.readLine();
    }
    String everything = sb.toString();
}

Example 2: java read text file

// java read text file with scanner
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class JavaReadTextFileScanner
{
   public static void main(String[] args) throws FileNotFoundException
   {
      File fl = new File("B:\demo.txt");
      Scanner sc = new Scanner(fl);
      while(sc.hasNextLine())
      {
         System.out.println(sc.nextLine());
      }
      sc.close();
   }
}