IntelliJ Working on multiple projects

Question

We build in maven multiple projects  let s name them A B C   Project A uses  jar of project B which uses  jar of project C   I am modifying codes of all A B C projects   A is MVC app  B are business services and C is some shared layer    The thing is  in Eclipse NetBeans I can see all of them at once and it s comfortable to modify them  In IDEA though  I have to open 3 instances  or n instances  of IntelliJ IDEA   Am I missing something  Is there better approach when using IntelliJ  This is the biggest downside of IntelliJ for me atm

User · Answer

new empty project File -  New -  Module from Existing Sources

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For people not using maven to build and wanting to add a new project  I am using intellij 14 1 3     Right click the top level folder in the project view  select new -  Module Name the module the same name as the project to be added From the top menu select File- New- Project  Enter the same name as the new module  same folder locations as well  Open the Project  and wait for intellij to create the project structure  Close this new project  and open the original project the module was added to in step 2   Depending on your builder  additional steps will be needed to add it to the build process    For SBT  and in the top level project I modified the Build scala file to aggregate the new project  and added the project in the SBT projects window  More info on SBT multiproject builds  http   www scala-sbt org 0 12 2 docs Getting-Started Multi-Project html

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Open preference -  appearance  amp  behaviour -  System settings -  select  open project in new window  then apply   Then you could open and edit multiple projects

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To expand  Neo answer  after choosing your directory  select import module from external model and choose your model  maven in this case      Then check keep project files option from next dialog  It will keep all files in original directory     Your final project structure would be something like this      Now you can add your module as dependency to other module s pom xml and if you change the source code of your dependencies  Intellij takes care of updating your project  there is no need to run mvn build manually for dependencies

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you can use import module option which will open it just like eclipse in the same navigator

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To Intellij IDEA 2019 2  F4   click on module  click to   for add any project from your HDD  above this menu yo can edit the IDE with you create the project and more options  very easy

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Step 1  Open  quot Maven Projects quot   Step 2  Select the project you want to import

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Prequisite Having all the related projects in the same root directory  Steps 1  First you create a new Empty project   2  Then you select the root directory of all you projects  This will create a empty project  with a  idea directory that will simply remember the module organisation we are about to do in the next step   3  Then  in the next window  you import the different projects as modules   4  In the next window  to import each project  simply double click on the build gradle  or pom xml The project will be imported as a new module    5  Done  you now have all your projects as modules  opened on the same IntelliJ project

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Since macOS Big Sur and IntelliJ IDEA 2020 3 2 you can use  quot open projects in tabs on macOS Big Sur quot  feature  To use it  you have to enable this feature in your system settings  System Preferences - gt  General - gt  Prefer tabs  always  when opening documents  After this step  when you will try to open second project in IntelliJ  choose New Window  yes  New Window  not This Window    It should result with opening new project in same window  but in the new card

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I think this has improved with recent versions of IntelliJ  In my current version  12 0 2   you can add any number of separate Maven projects to the same  workspace     The simplest way I ve found to do this is to click the little   icon in the  Maven Projects  window  View   Tool Windows   Maven Projects  and then select the additional pom file you want to import

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None of the solutions worked for me  since I am not working on Maven projects  There is a simpler solution  Go to   File- Project Structure- Modules     Instead of adding module  simply click the third option  copy   Browse your local directory and select the project you would like to add  Module name will resolve automatically  That s it   Update  When you want to reopen to project with multiple sub-projects  in order to avoid re-doing steps as described above  just go to  File- Open Recent-  Your Big Project

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As of release 2019 2  this is as easy as File- Attach Project       See  https   youtrack jetbrains com issue WEB-7968

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Use the button for the add maven projects and go inside the folder of the project  Then  select the pom xml file and add them in the IntelliJ

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For who uses Gradle can also avail the same       Go to  1  View --  Tool Windows --  Gradle 2  Click on the   button and add your build gradle file

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In IntelliJ 14 1 2  I did it like following   Select File- Project Structure- Modules    Select   and Import Module and select the directory of your project or directory where pom exists  and click OK    Follow through the next flow of screens and after you click Finish  you should see the project alongside your existing one

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Press  F4  on windows which will open up  Project Structure  and then click     icon or  Alt   Insert  to select a new project to be imported  then click OK button

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There is no need to move entire projects to a module   The use case for module is a bit finer grained than as a project container   To open multiple projects in the same window    File -  Open Project  Select open in this window   Check box that says add to current project

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Yes  your intuition was good  You shouldn t use three instances of intellij  You can open one Project and add other  parts  of application as Modules  Add them via project browser  default hotkey is alt 1

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You can use Armory plugin which makes switching between projects comfortable  The default shortcut for Project List is Alt   A     By default currently opened projects are displayed at the top of this list  with bold style

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I am new to maven and did not understand how I could work with local maven project added through Viktor Nordling s answer and still have a proper dependency in pom xml file  The answer is simple  intellij first looks at your locally added module and if it doesn t find one it goes to get the project remotely  You can check this by looking at  external libraries  under your project browser when you add or remove maven module   Hope this helps anyone

[intellij-idea] IntelliJ: Working on multiple projects

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