Only one instance of class should be creatred

[Laxmikant Kumbhare]

Is there any way in JAVA so that only one instance can be created of an application?

[Ganesan Ponnusamy]

You can use singleton pattern to achieve the same.

Typical example:

public class ConfigParameters {

private static ConfigParameters _instance = new ConfigParameters();

private MySingleton() { // make private to avoid creating objects outside ConfigParameters
// construct object . . .
}

public static ConfigParameters getInstance() {

return _instance; // return same instance for all clients

}

} 

You can also implement singleton pattern in Java by using Enums.

[Stephan van Hulst]

The original poster probably wants one instance of the application, not of a class.

Take a look at this article: http://www.rbgrn.net/content/43-java-single-application-instance

[Laxmikant Kumbhare]

thanks stephan !

[Mike Okri]

You may also want to take a look at the free JUnique library.

[Laxmikant Kumbhare]

Mike Okri wrote:You may also want to take a look at the free JUnique library.

What is it?

[Jeff Verdegan]

Laxmikant Kumbhare wrote:

Mike Okri wrote:You may also want to take a look at the free JUnique library.

What is it?

Click the link and find out.