Java.io.ObjectInputStream.readDouble() Method

Description

The java.io.ObjectInputStream.readDouble() method reads a 64 bit double.

Declaration

Following is the declaration for java.io.ObjectInputStream.readDouble() method

public double readDouble()

Parameters

• NA

Return Value

This method returns the 64 bit double read

Exception

• EOFException -- If end of file is reached.

• IOException -- If an I/O error has occurred.

Example

The following example shows the usage of java.io.ObjectInputStream.readDouble() method.

package com.tutorialspoint;

import java.io.*;

public class ObjectInputStreamDemo {

   public static void main(String[] args) {

      double b = 0380549705498d;
      try {

         // create a new file with an ObjectOutputStream
         FileOutputStream out = new FileOutputStream("test.txt");
         ObjectOutputStream oout = new ObjectOutputStream(out);

         // write something in the file
         oout.writeDouble(b);
         oout.writeDouble(49753986394864d);
         oout.flush();

         // create an ObjectInputStream for the file we created before
         ObjectInputStream ois =
                 new ObjectInputStream(new FileInputStream("test.txt"));

         // read and print a double
         System.out.println("" + ois.readDouble());

         // read and print a double
         System.out.println("" + ois.readDouble());

      } catch (Exception ex) {
         ex.printStackTrace();
      }

   }
}

Let us compile and run the above program, this will produce the following result:

3.80549705498E11
4.9753986394864E13