Intellij IDEA – in my opinion the most productive IDE for Java – comes with bunch of features helping getting rid of writing repetitive code – which is a everyday business no matter what language you use. One of them is live templates.
Live templates contain predefined code fragments. You can use them to insert frequently-used or custom code constructs into your source code file quickly, efficiently, and accurately.
IDEA comes with a set of live templates for Java, Maven, HTML, CSS and more and also enables to create custom templates.
Inserting live template
There are 2 ways to insert live template:
- Type live template abbreviation (for example dep) and next press TAB key
- Use shortcut Command + J (Mac) / Ctrl + J (PC) to popup list of available live templates in current context
At the beginning it’s quite difficult to remember all you wish to use and going back and forth from code to settings or browsing list is not very efficient – especially when you don’t know what you are looking for. That’s why I created gallery of (in my opinion) most useful built-in live templates for Java and Maven that can be used as a cheat sheet:
Maven
- dep – Inserts <dependency/>
- pl – Inserts <plugin/>
- repo – Inserts <repo/>
Iterations
- fori – creates iteration loop
- itar – iterates elements of array
- itco – iterates elements of java.util.Collection
- iter – iterates Iterable
- itit – iterates java.util.Iterator
- itli – iterates elements of java.util.List
Other
- ifn – Inserts “if null” statement
- inn – Inserts “if not null” statement
- inst – Checks object type with instanceof and down-casts it
- lazy – Performs lazy initialization
Plain
- psf – public static final
- psfi – public static final int
- psfs – public static final String
- thr – throw new
Summary
Using predefined Java templates is just a beginning. You can find ready to use templates for particular frameworks on Github and I really encourage you to create your custom, project specific ones.
If you created interesting common use live templates for Java or related frameworks feel invited to post them in comments.