Java IO Tutorial - Java ObjectInputStream.available()

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Syntax

ObjectInputStream.available() has the following syntax.

public int available()  throws IOException

Example

In the following code shows how to use ObjectInputStream.available() method.

/*  w w w .  ja v  a  2s  .  c o m*/
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

public class Main {

  public static void main(String[] args) throws Exception {

    FileOutputStream out = new FileOutputStream("test.txt");
    ObjectOutputStream oout = new ObjectOutputStream(out);

    // write something in the file
    oout.writeUTF("Hello World from java2s.com");
    oout.flush();
    oout.close();
    // create an ObjectInputStream for the file we created before
    ObjectInputStream ois = new ObjectInputStream(new FileInputStream(
        "test.txt"));

    // check how many bytes are available
    System.out.println(ois.available());
    ois.close();
  }
}

The code above generates the following result.

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