Java ObjectInputStream .readFully (byte[] buf)

public void readFully(byte[] buf)  throws IOException

/* ww  w. j  ava2s .com*/

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 {

    String s = "Hello World from java2s.com";

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

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

    // read and print the whole content
    byte[] b = new byte[13];
    ois.readFully(b);
    String array = new String(b);
    System.out.println(array);
    ois.close();
  }
}