Java.util.Formatter.close() Method


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Description

The java.util.Formatter.close() method closes this formatter. If the destination implements the Closeable interface, its close method will be invoked. Closing a formatter allows it to release resources it may be holding (such as open files). If the formatter is already closed, then invoking this method has no effect.

Declaration

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

public void close()

Parameters

  • NA

Return Value

This method does not return a value.

Exception

  • NA

Example

The following example shows the usage of java.util.Formatter.close() 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);

   // close the formatter
   formatter.close();

   // attempt to access the formatter results in exception
   System.out.println("" + formatter);
   }
}

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

Hello World !
Exception in thread "main" java.util.FormatterClosedException
   at java.util.Formatter.ensureOpen(Formatter.java:2318)
   at java.util.Formatter.toString(Formatter.java:2265)
   at java.lang.String.valueOf(String.java:2826)
   at java.lang.StringBuilder.append(StringBuilder.java:115)
   at com.tutorialspoint.FormatterDemo.main(FormatterDemo.java:25)
Java Result: 1

java_util_formatter.htm

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