Most likely you have incorrect compiler options imported from Maven here: Also check project and module bytecode (target) version settings outlined on the screenshot. Other places where the source language level is configured: Project Structure | Project Project Structure | Modules (check every module) | Sources Maven default language level is 1.5 (5.0), you will … Read more
Check idea.log for errors. It may fail with OutOfMemory error in which case you can try increasing the heap size for Maven Importer (VM options for importer) and IDE heap size. Try not to exceed 750-1024m for -Xmx value if you are running on a 32-bit JVM (default), otherwise it may crash or fail to … Read more
If you see that error occur after upgrading versions of IntelliJ IDEA or Android Studio, or after Generating a new APK, you may need to refresh the IDE’s cache. File -> Invalidate Caches / Restart…
Here’s how to build a jar with IntelliJ 10 http://blogs.jetbrains.com/idea/2010/08/quickly-create-jar-artifact/ File -> Project Structure -> Project Settings -> Artifacts -> Click green plus sign -> Jar -> From modules with dependencies… The above sets the “skeleton” to where the jar will be saved to. To actually build and save it do the following: Extract to … Read more
As mentioned in the comments, the Starting Guide is the place to start with Java 11 and JavaFX 11. The key to work as you did before Java 11 is to understand that: JavaFX 11 is not part of the JDK anymore You can get it in different flavors, either as an SDK or as … Read more
UPDATE: Quicker solution by the user Hong given below: Delete the caches folder: C:\Users\my_user_name\.AndroidStudio3.3\system\caches ===================== Here’s what worked for me. Close Android Studio Go to C:\Users*your username* Locate the Android Studio settings directory named .AndroidStudioX.X (X.X being the version) Rename it to something like old.AndroidStudioX.X Start Android Studio, and when it asks if you want … Read more
Steps for adding external jars in IntelliJ IDEA: Click File from the toolbar Select Project Structure option (CTRL + SHIFT + ALT + S on Windows/Linux, ⌘ + ; on Mac OS X) Select Modules at the left panel Select Dependencies tab Select + icon Select 1 JARs or directories option
Once you get the input: if check the input is equal to “1”, then print “Rock”. else if check the input is equal to “2”, then print “Paper”. else if check the input is equal to “3”, then print “Scissors”. else, then print “invalid input”. The pseudo code for the above steps is below: if … Read more