Read double from DataInputStream : DataInputStream « File « Java Tutorial

1. Java Tutorial
2. File
3. DataInputStream

import java.io.DataInputStream;
import java.io.EOFException;
import java.io.FileInputStream;
import java.io.IOException;

public class MainClass {

  public static void main(String[] args) {
    try {
      FileInputStream fin = new FileInputStream("myFile.dat");
      DataInputStream din = new DataInputStream(fin);
      while (true) {
        double theNumber = din.readDouble();
        System.out.println(theNumber);
      }
    } catch (EOFException e) {
    } catch (IOException e) {
      // abnormal termination
      System.err.println(e);
    }
  }
}