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Java Reader ready() method with Example

Reader Class ready() method: Here, we are going to learn about the ready() method of Reader Class with its syntax and example.
Submitted by Preeti Jain, on April 27, 2020

Reader Class ready() method

  • ready() method is available in package.
  • ready() method is used to check whether this stream is ready to be read 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.


    public boolean ready();


  • It does not accept any parameter.

Return value:

The return type of the method is boolean, it returns true when this stream is ready (i.e. input data is available for the next read) otherwise it returns false.


// Java program to demonstrate the example 
// of boolean ready() method of Reader


public class ReadyOfR {
    public static void main(String[] args) throws Exception {
        Reader r_stm = null;

        try {
            // Instantiates Reader
            r_stm = new StringReader("JavaWorld!!!!");

            // By using ready() method is to
            // check whether this stream r_str
            // is ready to be read or not
            boolean status = r_stm.ready();
            System.out.println("r_stm.ready(): " + status);
        } catch (Exception ex) {
        } finally {
            // with the help of this block is to
            // free all necessary resources linked
            // with the stream
            if (r_stm != null) {


r_stm.ready(): true


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