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Java Singleton Template For Eclipse

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        This is a template for easily creating an implementation of the Singleton Pattern on Eclipse. Open Window->Preferences->Java->Editor->Templates click on New and insert the code below on the pattern text area; add a name (I suggest "singleton") - whenever you type this name and press Ctrl+Space the code will be inserted in your class - and you're good to go.

private static ${enclosing_type} instance;

private ${enclosing_type}(){}

public static ${enclosing_type} getInstance(){
	if(null == instance){
		instance = new ${enclosing_type}();
	return instance;


Weei Jye Chay replied on Tue, 2007/02/13 - 9:39pm

best way i know of implementing a singleton: although, be careful of using singletons in clustered environments. try something cluster-aware caching mechanisms, like OSCache, instead.

Snippets Manager replied on Sun, 2007/02/11 - 4:06am

my previous comment got screwed and there is no way to delete it so sorry and here goes

Snippets Manager replied on Sun, 2007/02/11 - 4:06am

Snippets Manager replied on Sun, 2007/02/11 - 4:06am

see here for brief intro to concurrent programming and how this code will create a race condition

Marc Stock replied on Fri, 2007/03/02 - 5:59pm

Unfortunately this isn't the correct way to code a singleton in Java. The object needs to be instantiated on the line it's defined. Your if check is just creating a race condition that will not guarantee you a single instance.