Java.io.ObjectOutputStream.writeDouble() Method

Description

The java.io.ObjectOutputStream.writeDouble(double val) method writes a 64 bit double.

Declaration

Following is the declaration for java.io.ObjectOutputStream.writeDouble() method

public void writeDouble(double val)

Parameters

• val -- the double value to be written

Return Value

This method does not return a value.

Exception

• IOException -- if I/O errors occur while writing to the underlying stream

Example

The following example shows the usage of java.io.ObjectOutputStream.writeDouble() method.

package com.tutorialspoint;

import java.io.*;

public class ObjectOutputStreamDemo {

   public static void main(String[] args) {

      double d = 1.59875d;
      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(d);
         oout.writeDouble(9673.49764d);

         // close the stream
         oout.close();

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

         // read and print what we wrote before
         System.out.println("" + ois.readDouble());
         System.out.println("" + ois.readDouble());

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

   }
}

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

1.59875
9673.49764