Java.io.OutputStream.close() Method

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Description

The java.io.OutputStream.close() method closes this output stream and releases any system resources associated with this stream. The general contract of close is that it closes the output stream. A closed stream cannot perform output operations and cannot be reopened. The close method of OutputStream does nothing.

Declaration

Following is the declaration for java.io.OutputStream.close() method.

public void close()

Parameters

NA

Return Value

This method does not return a value.

Exception

IOException − If an I/O error occurs.

Example

The following example shows the usage of java.io.OutputStream.close() method.

package com.tutorialspoint;

import java.io.*;

public class OutputStreamDemo {
   public static void main(String[] args) {
      try {
         // create a new output stream
         OutputStream os = new FileOutputStream("test.txt");

         // craete a new input stream
         InputStream is = new FileInputStream("test.txt");

         // write something
         os.write('A');

         // flush the stream
         os.flush();

         // close the stream but it does nothing
         os.close();

         // read what we wrote
         System.out.println("" + (char) is.read());
      } catch (Exception ex) {
         ex.printStackTrace();
      }
   }
}

Let us compile and run the above program, this will produce the following result −

A