Java IO Tutorial - Java ObjectInputStream .readFully (byte[] buf, int off, int len)

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Syntax

ObjectInputStream.readFully(byte[] buf, int off, int len) has the following syntax.

public void readFully(byte[] buf,  int off,  int len)  throws IOException

Example

In the following code shows how to use ObjectInputStream.readFully(byte[] buf, int off, int len) method.

//from ww  w  .jav a  2s  .  co 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 {

    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 from index 0 to 7
    byte[] b = new byte[13];
    ois.readFully(b, 0, 7);
    String array = new String(b);
    System.out.println(array);
    ois.close();

  }
}

The code above generates the following result.

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