Java.io.ObjectOutputStream.writeLong() Method

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Description

The java.io.ObjectOutputStream.writeLong(long val) method a 64 bit long.

Declaration

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

public void writeLong(long val)

Parameters

val − The long 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.writeLong() method.

package com.tutorialspoint;

import java.io.*;

public class ObjectOutputStreamDemo {
   public static void main(String[] args) {
      long l = 976349698745987459l;
      
      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(984876837644l);

         // 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.readLong());
         System.out.println("" + ois.readLong());
      } catch (Exception ex) {
         ex.printStackTrace();
      }
   }
}

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

976349698745987459
984876837644