Java.io.OutputStream.close() Method

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