Java ObjectInputStream close() Method

The close() method of ObjectInputStream class closes the input stream. It must be called to release any resource associated with the stream.

Syntax

Parameter

Returns

Throws

IOException

Example 1

import java.io.*;
public class ObjectInputStreamcloseExample1   {
   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);
         //objoutstream.flush();

         // 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());

        // read and print an object and cast it as string
         byte[] read = (byte[]) objinstream.readObject();
         String s2 = new String(read);
         System.out.println("" + s2);
         objinstream.close();  
      } catch (Exception ex) {
         ex.printStackTrace();
      }
   }
}

Output:

Hello
javaTpoint

Example 2

import java.io.*;
public class ObjectInputStreamcloseExample2 {
   public static void main(String[] args) {
      try {
         // create a new file with an ObjectOutputStream
          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());
         objinstream2.close();
         objinstream.close();
      } catch (Exception ex) {
         ex.printStackTrace();
      }
   }
}

Output: