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I have two methods in my code base. I would like to figure out, if there exists a path in which one will be called from the other. Is there some way to achieve this easily in IntelliJ without digging manually through call hierarchies?

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  • Would it help to run a unit test with code coverage, and see if the second method turns green? Commented Jan 18, 2016 at 7:35
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    No, the code has hundreds of possible code paths. Right now I am only trying to determine if a method could be called, not whether it definitely is called in some scenario. Commented Jan 18, 2016 at 15:18
  • Well if you reach 100% code coverage then you have in fact established that ;) Commented Jan 18, 2016 at 19:13

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The following might work for you on IntellIJ IDEA 16 and higher. It uses call hierarchies, but automates the digging;-)

  • invoke Call Hierarchy Ctrl+Alt+H on method 1.
  • click on the Callee Methods Hierarchy button in the tool window that appears to show all methods that are called by method 1.
  • click on the Expand All button a couple of times to show called methods until the desired depth.
  • Invoke Find Usages on method 2 and select the Scope Hierarchy 'Callees of 1'

Result: all calls of method 2 in method 1's call hierarchy.

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10 Comments

Genius! Can get really slow with wide hierarchies, and it's hard to see the actual path, but still great! Much faster than searching manually, that's for sure.
I cannot find a way to select the Hierarchy 'Callees of 1' scope in IntelliJ IDEA 2018.3.3. Does that capability still exist?
The Hierarchy scope has indeed disappeared. It's a bug.
@BasLeijdekkers the ticket now says fixed? yet I still can't find this option in 2019.2
It works for me in 2019.2. Make sure you have a hierarchy tool window open, or the scope won't appear.
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I've done the following:

  • Select method 2 and invoke call hierarchy with Ctrl+Alt+H.
  • Click Expand All on the hierarchy panel
  • Click inside the hierarchy panel, and start typing the name of method 1
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