Formatter ioException() method in Java with Examples

Last Updated : 01 Apr, 2019

The ioException() method is a built-in method of the java.util.Formatter which returns the IOException last thrown by this formatter's Appendable. If the destination's append() method never throws IOException, then this method will always return null. Syntax:

public IOException ioException()

Parameters: The function accepts no parameter. Return Value: The function returns the IOException which was last thrown by the Formatter's appendable. Below is the implementation of the above function: Program 1:

Java

// Java program to implement
// the above function

import java.util.Formatter;
import java.util.Locale;

public class Main {

    public static void main(String[] args)
    {

        // Get the string Buffer
        StringBuffer buffer
            = new StringBuffer();

        // Object creation
        Formatter frmt
            = new Formatter(buffer,
                            Locale.CANADA);

        // Format a new string
        String name = "My name is Gopal Dave";
        frmt.format("What is your name? \n%s !",
                    name);

        // Print the Formatted string
        System.out.println(frmt);

        // flushes the formatter
        frmt.flush();
        System.out.println("Flushed");
    }
}

Output:

What is your name? 
My name is Gopal Dave !
Flushed

Program 2:

Java

// Java program to implement
// the above function

import java.util.Formatter;
import java.util.Locale;

public class Main {

    public static void main(String[] args)
    {

        // Get the string Buffer
        StringBuffer buffer
            = new StringBuffer();

        // Object creation
        Formatter frmt
            = new Formatter(buffer,
                            Locale.CANADA);

        // Format a new string
        String name = "My name is Gopal Dave";
        frmt.format("What is your name? \n%s !",
                    name);

        System.out.println("The last exception thrown: "
                           + frmt.ioException());

        // Closes the format
        frmt.close();
    }
}