- Java.util Package Classes
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- Java.util Package Extras
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Java Formatter close() Method
Description
The Java 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
Closing a Formatter Object of US Locale Example
The following example shows the usage of Java Formatter close() method to close a formatter. We've created a formatter object with a StringBuffer and a US locale. Formatter is used to print a string and then closed using close() method. Now accessing the formatter will result in exception as shown in the example.
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); } }
Output
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)
Closing a Formatter Object of GERMAN Locale Example
The following example shows the usage of Java Formatter close() method to close a formatter. We've created a formatter object with a StringBuffer and a GERMAN locale. Formatter is used to print a string and then closed using close() method. Now accessing the formatter will result in exception as shown in the example.
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); // close the formatter formatter.close(); // attempt to access the formatter results in exception System.out.println("" + formatter); } }
Output
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)
Closing a Formatter Object of FRENCH Locale Example
The following example shows the usage of Java Formatter close() method to close a formatter. We've created a formatter object with a StringBuffer and a FRENCH locale. Formatter is used to print a string and then closed using close() method. Now accessing the formatter will result in exception as shown in the example.
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); // close the formatter formatter.close(); // attempt to access the formatter results in exception System.out.println("" + formatter); } }
Output
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)
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