Java.io.Reader.read() Method


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Description

The java.io.Reader.read() method reads a single character. This method will block until a character is available, an I/O error occurs, or the end of the stream is reached.

Declaration

Following is the declaration for java.io.Reader.read() method.

public int read()

Parameters

NA

Return Value

This method returns the character read, as an integer in the range 0 to 65535 (0x00-0xffff), or -1 if the end of the stream has been reached.

Exception

IOException − If the stream does not support mark(), or if some other I/O error occurs.

Example

The following example shows the usage of java.io.Reader.read() method.

package com.tutorialspoint;

import java.io.*;

public class ReaderDemo {

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

      // create a new StringReader
      Reader reader = new StringReader(s);

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

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

         // close the stream
         reader.close();

      } catch (IOException ex) {
         ex.printStackTrace();
      }
   }
}

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

Hello

java_io_reader.htm

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