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 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 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(); }} |
Output:
The last exception thrown: null
Output:
The last exception thrown: null
Reference: https://docs.oracle.com/javase/10/docs/api/java/util/Formatter.html#flush()
