Java Formatter flush() Method

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Description

The java.util.Formatter.flush() method flushes this formatter. If the destination implements the Flushable interface, its flush method will be invoked. Flushing a formatter writes any buffered output in the destination to the underlying stream.

Declaration

Following is the declaration for java.util.Formatter.flush() method

public void flush()

Parameters

NA

Return Value

This method does not return a value.

Exception

FormatterClosedException − If this formatter has been closed by invoking its close() method

Flushing a Formatter Object of US Locale Example

The following example shows the usage of Java Formatter flush() method to flush a formatter. We've created a formatter object with a StringBuffer and a US locale. Formatter is used to print a string and then flushed using flush() method.

package com.tutorialspoint;

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

public class FormatterDemo {
   public static void main(String[] args) {

      // create a new formatter
      StringBuffer buffer = new StringBuffer();
      Formatter formatter = new Formatter(buffer, Locale.US);

      // format a new string
      String name = "World";
      formatter.format("Hello %s !", name);

      // print the formatted string
      System.out.println("" + formatter);

      // flush the formatter. Here it does nothing.
      formatter.flush();
      System.out.println("Formatter Flushed.");
	  
      formatter.close();
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Hello World !
Formatter Flushed.

Flushing a Formatter Object of FRENCH Locale Example

The following example shows the usage of Java Formatter flush() method to flush a formatter. We've created a formatter object with a StringBuffer and a FRENCH locale. Formatter is used to print a string and then flushed using flush() method.

package com.tutorialspoint;

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

public class FormatterDemo {
   public static void main(String[] args) {

      // create a new formatter
      StringBuffer buffer = new StringBuffer();
      Formatter formatter = new Formatter(buffer, Locale.FRENCH);

      // format a new string
      String name = "World";
      formatter.format("Hello %s !", name);

      // print the formatted string
      System.out.println("" + formatter);

      // flush the formatter. Here it does nothing.
      formatter.flush();
      System.out.println("Formatter Flushed.");
	  
      formatter.close();
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Hello World !
Formatter Flushed.

Flushing a Formatter Object of GERMAN Locale Example

The following example shows the usage of Java Formatter flush() method to flush a formatter. We've created a formatter object with a StringBuffer and a GERMAN locale. Formatter is used to print a string and then flushed using flush() method.

package com.tutorialspoint;

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

public class FormatterDemo {
   public static void main(String[] args) {

      // create a new formatter
      StringBuffer buffer = new StringBuffer();
      Formatter formatter = new Formatter(buffer, Locale.GERMAN);

      // format a new string
      String name = "World";
      formatter.format("Hello %s !", name);

      // print the formatted string
      System.out.println("" + formatter);

      // flush the formatter. Here it does nothing.
      formatter.flush();
      System.out.println("Formatter Flushed.");
	  
      formatter.close();
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Hello World !
Formatter Flushed.