Tool use of rookie tutorial -- View subclass (implementation class) class diagram in idea

Software environment

• Mac OS
• JDK 1.8
• IDEA Ultimate 2019.2

Background introduction

Looking at the class diagram can help us quickly understand the main logic of the code , It is definitely a good helper for learning source code and studying technology . We all know that IDEA Pass through Option+Shift+Command+U Or right click ==》Diagrams ==》Show Diagram You can view the diagram of a class and its parent class . But if you want to see all subclasses or implementation classes of a class or interface , There is not a particularly good tutorial available online （ Maybe I didn't find ）. For this reason , I did some research （ In fact, it's chaos everywhere ） Found the corresponding method . So I wrote it out and shared it with you , It's a coincidence .

step

First of all, we still need to Show Diagram, It can be operated by mouse , You can also use shortcut keys ：

adopt Add Class The way

You can right-click ==》 Add Class to Diagram To add subclasses ：

You can also press “ Space ” To add ：

Enter the class you want to display in the search box , It should be noted that this method can not only add subclasses of the current class , You can also add any class you want （ As long as this class is in your classpath Next ）.

adopt Show Implementations The way

This method can also be completed by right clicking , Right click the current class ==》 Show Implementations：

Of course, you can still use shortcut keys ：Option+Command+B To add ：

This way is to really add the current class / Subclass of interface / Implementation class .

effect

And then once you're done , The effect is as follows ：

end

The above describes two uses IDEA How to view the class diagram , The first one is suitable for those familiar with class structure , Or you need to view multiple inheritance relationship trees at the same time ; The second is suitable for unfamiliar situations , Because its subclasses can be accurately found . If you have a better way, I hope you can share it with me .

PS： If you want to add all subclasses / Implementation class , Pop up candidate subclasses / When implementing the class list, select all and press enter .