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Java InputStreamReader ready() Method with Example

InputStreamReader Class ready() method: Here, we are going to learn about the ready() method of InputStreamReader Class with its syntax and example.
Submitted by Preeti Jain, on April 13, 2020

InputStreamReader Class ready() method

  • ready() method is available in java.io package.
  • ready() method is used to check whether this InputStreamReader is ready to be ready or not.
  • ready() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
  • ready() method may throw an exception at the time of checking the state of the stream.
    IOException: This exception may throw when getting any input/output error while performing.

Syntax:

    public boolean ready();

Parameter(s):

  • It does not accept any parameter.

Return value:

The return type of the method is String, it returns true when this stream is ready to be read otherwise it returns false.

Example:

// Java program to demonstrate the example // of boolean ready() method of // InputStreamReader import java.io.*; public class ReadyOfISR { public static void main(String[] args) throws Exception { InputStream is_stm = null; InputStreamReader isr_stm = null; int val = 0; try { // Instantiates FileInputStream and InputStreamReader is_stm = new FileInputStream("D:\\includehelp.txt"); isr_stm = new InputStreamReader(is_stm); // By using ready() method is to // check whether this stream isr_stm // stream is ready to be read or not boolean status = isr_stm.ready(); System.out.println("isr_stm.ready(): " + status); } catch (Exception ex) { System.out.println(ex.toString()); } finally { // with the help of this block is to // free all necessary resources linked // with the stream if (is_stm != null) { is_stm.close(); if (isr_stm != null) { isr_stm.close(); } } } } }

Output

isr_stm.ready(): true


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