Java.io.ObjectInputStream.read() Method

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Description

The java.io.ObjectInputStream.read() method reads a byte of data. This method will block if no input is available.

Declaration

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

public int read()

Parameters

NA

Return Value

This method returns the byte read, or -1 if the end of the stream is reached.

Exception

IOException − If an I/O error has occurred.

Example

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

package com.tutorialspoint;

import java.io.*;

public class ObjectInputStreamDemo {
   public static void main(String[] args) {
      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.writeUTF("Hello World");
         oout.flush();

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

         // read from the stream
         for (int i = 0; i < ois.available();) {
            System.out.print("" + (char) ois.read());
         }
      } catch (Exception ex) {
         ex.printStackTrace();
      }
   }
}

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

Hello World