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Java PrintWriter checkError() Method with Example

PrintWriter Class checkError() method: Here, we are going to learn about the checkError() method of PrintWriter Class with its syntax and example.
Submitted by Preeti Jain, on April 19, 2020

PrintWriter Class checkError() method

• checkError() method is available in java.io package.
• checkError() method is used to check the error state of this stream and flush the stream when it is not closed.
• checkError() 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.
• checkError() method does not throw an exception at the time of checking error state.

Syntax:

    public boolean checkError();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of the method is boolean, it returns true when the PrintStream has encountered an error either on the underlying output stream or in the process of format conversion otherwise it returns false.

Example:

// Java program to demonstrate the example 
// of boolean checkError() method of 
// PrintWriter

import java.io.*;

public class CheckErrorOfPW {
    public static void main(String[] args) {
        String str = "Java Programming";

        // Instantiates PrintWriter
        PrintWriter p_stm = new PrintWriter(System.out);

        // Display str
        p_stm.println("str: " + str);

        // By using checkError() method is to check
        // error state whether the stream throw any 
        // error , exception or not and along with flushing
        boolean status = p_stm.checkError();
        System.out.println("p_stm.checkError(): " + status);

        // By using close() method is to 
        // close the stream p_stm
        System.out.println("Stream Shutdown....");
        p_stm.close();
    }
}

Output

str: Java Programming
p_stm.checkError(): false
Stream Shutdown....