Java ObjectInputStream available() Method with Examples

by Online Tutorials Library July 22, 2022

Java ObjectInputStream available() Method

The available() method of ObjectInputStream class returns the number of bytes that can be read without blocking.

Syntax

Parameter

Returns

The number of available bytes.

Throws

IOException

Example 1

  import java.io.*;  public class ObjectInputStreamavailableExample1  {       public static void main(String[] args) {                    String str = “Hello”;                    byte[] barray = {‘j’, ‘a’, ‘v’, ‘a’, ‘T’, ‘p’, ‘o’, ‘i’, ‘n’, ‘t’};                               try {                            // create a new file with an ObjectOutputStream                            FileOutputStream outstream = new FileOutputStream(“file1.txt”);                            ObjectOutputStream objoutstream = new ObjectOutputStream(outstream);                      // writing objects str and barray to objectoutputstream                            objoutstream.writeObject(str);                            objoutstream.writeObject(barray);                                                       // create an ObjectInputStream for the file we created before                           ObjectInputStream objinstream = new ObjectInputStream(new FileInputStream(“file1.txt”));                             // read and print an object and cast it as string                           System.out.println(“” + (String) objinstream.readObject());                           System.out.println(“” + objinstream.available());                                     byte[] read = (byte[]) objinstream.readObject();                           String s2 = new String(read);                           System.out.println(“” + s2);                          } catch (Exception ex) {                                   ex.printStackTrace();                                 }                   }  }  

Output:

Hello  0 TutorAspire

Example 2

  import java.io.*;  public class ObjectInputStreamavailableExample2  {     public static void main(String[] args) {        try {              FileInputStream instream = new FileInputStream(“file1.txt”);             ObjectInputStream objinstream = new ObjectInputStream(instream);             String str=objinstream.toString();               FileOutputStream outstream = new FileOutputStream(“file2.txt”);             ObjectOutputStream objoutstream = new ObjectOutputStream(outstream);               // writing objects str and barray to objectoutputstream             objoutstream.writeObject(str);             objoutstream.flush();              // create an ObjectInputStream for the file we created before            ObjectInputStream objinstream2 = new ObjectInputStream(new FileInputStream(“file2.txt”));              // read and print an object and cast it as string            System.out.println(“” + (String) objinstream.readObject());             // read and print an object and cast it as string           byte[] read = (byte[]) objinstream.readObject();           String s2 = new String(read);                     System.out.println(“” + s2);           System.out.println(“” + objinstream2.available());        } catch (Exception ex) {           ex.printStackTrace();        }     }  }  

Output:

Hello TutorAspire 0

Next TopicJava ObjectInputStream

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Java ObjectInputStream available() Method with Examples

Java ObjectInputStream available() Method

Syntax

Parameter

Returns

Throws

Example 1

Example 2

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