The flush() method is a built-in method of the java.util.Formatter which flushes the formatter. Writing any buffered output in its destination to the underlying operating system is referred to as Flushing.
Syntax:
public void flush()
Parameters: The function accepts no parameter.
Return Value: The function returns nothing, it just flushes the formatter. Hence the return type is void.
Errors and Exceptions: The function throws a FormatterClosedException when this function is used after closing the formatter.
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)    {        try {            // 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);              // closes the formatter            frmt.close();              // close the frmt            frmt.flush();            System.out.println("Flushed");        }        catch (Exception e) {            System.out.println("\nException is: "                               + e);        }    }} |
Output:
What is your name? My name is Gopal Dave ! Exception is: java.util.FormatterClosedException
Reference: https://docs.oracle.com/javase/10/docs/api/java/util/Formatter.html#close()
