Java.io.StringReader.close() Method

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Description

The java.io.StringReader.close() method closes the stream and releases any system resources associated with it. Once the stream has been closed, further read(), ready(), mark(), reset(), or skip() invocations will throw an IOException.

Declaration

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

public abstract 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.StringReader.close() method.

package com.tutorialspoint;

import java.io.*;

public class StringReaderDemo {
   public static void main(String[] args) {
      String s = "Hello World";

      // create a new StringReader
      StringReader sr = new StringReader(s);

      try {
         // read the first five chars
         for (int i = 0; i < 5; i++) {
            char c = (char) sr.read();
            System.out.print("" + c);
         }

         // change the line
         System.out.println();

         // close the stream
         sr.close();

         //try to access the reader after it is closed
         try {
            sr.ready();
            
         } catch (Exception ex) {
            // catch the exception and print a message if reader is closed
            System.out.println("Reader is closed.");
         }
         
      } catch (IOException ex) {
         ex.printStackTrace();
      }
   }
}

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

Hello
Reader is closed.