在Intellij IDEA中使用热键自动生成返回对象的类型和引用

Question

How can I get the type automatically of returned object for method using hotkeys in Intellij IDEA ?

Quite often there are times when you need to modify such line:

myinstance.getMyMethod();

in the following:

IMySomeObject mysomeobject = myinstance.getMySomeObject();

I wish that IDEA did it itself for me to save time. I do not wish to explore method's signature, find its returned type and manually create this reference with a specific type of returned object. It's not convenient.

Answer 1

Using the Introduce Variable refactor.

Select

myinstance.getMyMethod(); 

press <ctrl>+<alt> + V and you will see a selections of names to give it like

IMySomeObject mySomeObject = myinstance.getMySomeObject();

I then select <Enter> as the first option is usually fine.

I suggest you have a look at all the refactoring tools in the Refactor Menu and learn what they all do.

---

You can type m

then type .

then <Enter>

then press <ctrl> + <alt> + V

lastly press <Enter> to accept the default name.

Answer 2

Another way besides Introduce Variable is by using their postfix completion feature.

The key thing is to type .var after the expression and then press the tab key.

Eg

myinstance.getMyMethod().var

With your cursor right after .var , press ctrl + space , and then press tab to select the suggestion. You'll then end up with:

IMySomeObject mySomeObject = myinstance.getMySomeObject();

btw, there's many more postfix completions options; I find it to be a very handy feature.