Java.io.ObjectInputStream.readLong() Method

Description

The java.io.ObjectInputStream.readLong() method reads a 64 bit long.

Declaration

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

public long readLong()

Parameters

• NA

Return Value

This method returns the read 64 bit long.

Exception

• EOFException -- If end of file is reached.

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

Example

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

package com.tutorialspoint;

import java.io.*;

public class ObjectInputStreamDemo {

   public static void main(String[] args) {

      long l = 397638763597645l;
      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.writeLong(l);
         oout.writeLong(8364876387634l);
         oout.flush();

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

         // read and print a long
         System.out.println("" + ois.readLong());

         // read and print a long
         System.out.println("" + ois.readLong());


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

   }
}

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

397638763597645
8364876387634