I've been thinking about moving to Android development. I came from Java so I wanted to learn Kotlin with IntelliJ. I have never used a JetBrains software and I'm trying to follow a tutorial on YouTube.
The thing is none of the tutorials explain how to add a configuration to the project. For them a green arrow pops up when they create this function, but for me there is no run button and IntelliJ tells me I have to add some configuration?
fun main(){
println("Hello World")
}
IntelliJ doesn't seem to have recognised your src and test directories (since they aren't coloured blue and green, respectively).
When you create a new project, if you choose Gradle and then make sure to select Kotlin/JVM, it should set everything up for you correctly.
I had the same problem, but I solved this by putting the build system on gradle kotlin when I opened a new project.
Related
Intellij IDEA ignores SDKMAN!'s Kotlin installation and I want it to stop because whenever I have to use Kotlin in a project, it downloads everything again.
Is there an easy way to tell Intellij or Gradle to look for any Kotlin installation on PATH before trying to pull everything from the Internet?
Thanks in advance.
I am trying to learn coroutines and so I fire up IntelliJ and create a scratch file. But when I type in my coroutines I get compiler complaints such as runBlocking is an unresolved reference. So this is not an android project or any such thing. Just a scratch file in a basic Kotlin project.
How do I bring in the coroutine stuff so I stop getting errors?
runBlocking and other high-level coroutine utilities are not in the Kotlin standard library, but instead are a part of the library kotlinx.coroutines.
To use this library in your project you must download its binaries and add a dependency on them to the project. Usually declaring a library dependency is a line or couple of lines in a build file, if you use build systems like Gradle or Maven. However in a plain IntelliJ project it's possible to get that library from Maven Central almost without hassle:
Open project structure
In the "Modules" page select a module which you use as a context of the scratch file (I suppose there will be just one module).
Switch to "Dependencies" tab and hit the plus button.
then in a context menu select "Library" -> "From Maven"
paste maven coordinates of the kotlinx.coroutines library artifact:
org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.3
where 1.3.3 is the version of that library. You can find the latest available version here: https://github.com/Kotlin/kotlinx.coroutines/blob/master/README.md
be sure to check "Transitive dependencies" and "Sources" boxes.
After hitting OK the library will be downloaded from Maven Central repository with all its dependencies and added to your module. Then it will be possible to use runBlocking in your project or scratch files.
You should add kotlin coroutines library to your project. The simplest way to do it is to get it from Maven repo. At this moment actual version of library is 1.3.2 The address of library in maven repo you could find here
At moment of writing the address of library is
org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.2
In plain IDEA IntelliJ project you should make following steps:
1) Go to project structure
2) Then go to Modules page and Dependencies Tab
3) Press "+" button. Select library from "Maven"
4) In search bar use address org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.2 of library in maven repo and add it.
5) Press OK then Apply. And recompile your project. That is it. Now you could use coroutines in your project.
I work on a Java based Play! project for severals months now and I'd like to import it completely in IntelliJ, meaning being able to run, compile, test and debug from IntelliJ, without the need to use the command line.
According to this post from Jetbrain, it seems to be possible, if I quote the article it says clearly : "Now you don’t need to switch between IntelliJ IDEA and Play console anymore. Everything is available right from your favorite IDE.", but I can't figure out a way to achieve this for now, even if I follow the tutorial provided by Jetbrains.
Here are the steps I've been throught :
Open my fav IDE IntelliJ ;)
Go to the project list window.
Import project
Import from external model and choose SBT as suggested in Jetbrains tutorial.
option "Use auto import" checked, option "create directories for empty content roots automatically" checked. Project SDK Java 1.7
Global sbt settings : JVM From project JDK.
Finish
By now, if I try to make the project and launch it from IntelliJ, I'll get scala compiling errors related to routes object. Thanks to this post, we can understand that this happens because scala routes are located to specific folders that needs to be included in IntelliJ sources settings for this project. So next step was :
File -> Project Structure -> Modules
Add target/scala-2.10/classes:target/scala-2.10/resources_managed:target/scala-2.10/src_managed as sources folders.
But my problem remains the same, routes object being unrecognized.
Notes : I have no scala facets in my project structure configuration nor can add one.
IntelliJ provides integrated support for the Play Framework for Scala and Java. Support is currently only available in IntelliJ Ultimate Edition (see the Frameworks and Technology section).
Assuming Ultimate Edition, the setup for Play is incredibly easy. Simply create a new project by importing build.sbt, then choose Add Framework Support and choose Play 2.
Once complete, you can start and stop Play using the Play 2 Run/Debug configuration. No command line necessary.
Here is a more in depth look at IntelliJ's Play project configuration.
You could try the command play idea if you are using play or activator idea if you are using activator. That will do the magic.
I am using Gradle and IntelliJ IDEA. Normally I use apply plugin: 'idea' to generate the IDEA project files. With IDEA 12 I was used to work with the JetGradle tool view.
Now I updated to IDEA 13 and the JetGradle tool view is gone. When I use the old run configuration gradle:run, IDEA tells me:
Error running gradle:run:
Module 'X' is not backed by gradle.
How can I activate the gradle build in IDEA 13 without the tool view? I found this tweet from Cédric Champeau, but was still not able to solve it. Do I have to turn my simple gradle project into a multi module project or what?
Update
With File - Import Project ... I can import the build.gradle file and than I can choose View - Tool Windows - Gradle, which was hidden before. Is this the way to go?
What you state in your update is the correct way to go. The Gradle Plug-in received a lot of love in the IDEA 13 update and has changed a bit. An import of the Gradle build file is necessary. And as you have noted, the JetGradle tool window is now named simple Gradle
Tested with Gradle 1.9. In my opinion there are 2 issues:
Issue 1: when using gradlew idea I expect to receive a valid IDEA project without the need to import it. There are discussions on the gradle forum, see this Gradle forum post. In this Jetbrains forum post it is told that there is no backward compatibility with IntelliJ 12 gradle projects at the moment.
Issue 2: With IDEA 12 it was possible to open the JetGradle View even if the current project was not a gradle projcet. But the view displayed the message "There is no linked Gradle project. You can Add one" and offered you the possibility to convert the project to an gradle project with a simple click. In IDEA 13 it is not possible to open the Gradle View when the current project is not a gradle project. I asked a question here.
In the Gradle forum post mentioned above Peter Niederweiser stated:
The preferred way of integrating with IDEA 13 is to use IDEA's Gradle import, without running gradle idea. (You should still apply the idea plugin though, and it's still important to apply it to allprojects {} rather than subprojects {} when dealing with multi-project builds.)
So the answer from Mark Vedder is correct, altough I would have liked to have more information.
I have found that when you initially import a gradle project into Idea, if you don't have all of your directories created yet, the gradle tool window vanishes while you are importing into Idea. (It is there when the import starts, but at the end it disappears.) However, if I manually build the project first (on a mac, >gradle clean build), and then go back to IDEA and import the project, the gradle tool window stays active. Hopefully this will help someone else.
you can go to Project Structure (Ctrl + Alt + Shift +S) and then under the Modules, click "Import Module" and choose your build.gradle from the project file repo. It will make the module gradle aware and then you will also see the Gradle window
The simplest way to do this is to use the Import Project option if you cannot use the gradlew idea to produce the idea project
I know there is one for play1, but I don't find any for play2.
I hope the plugin can compile the templates to scala code automatically. It's not convenient now.
I just came across Scala IDE Play2 plugin for Eclipse Indigo/Juno and Scala IDE. The current features are
Syntax Highlighting (routes and templates)
Code completion (templates)
Formatter (routes)
Hyperlinking (routes and templates)
Note that hyperlinking to Java files is not supported for now. Also there are some limitations for the code completion feature, just take some time to read the doc. I didn't try it myself as I'm not working with Play2 right now, but thought it might be helpful for someone.
Edit: This answer is outdated. A Play Eclipse plugin has been written, as #Baztoune says.
There is no Play 2 plugin for Eclipse at the time I’m writing these lines. However, there is an eclipsify sbt command, provided by the Play 2 sbt plugin, which is able to generate an Eclipse project from a Play 2 application.
You won’t get syntax highlighting, contextual completion or code navigation inside Play 2 templates, but you can have them to be automatically compiled when saved by using the ~run sbt command (instead of just run). Check the Eclipse “General −> Workspace −> Refresh using native hooks or polling” option is enabled so it will take compiled templates changes into account.
Yes, here's how to get started:
Find the correct update site for your version of Eclipse from http://scala-ide.org/download/current.html.
In Eclipse go to Help->Install New Software. Use the update site from above to locate Scala related plugins.
Install both the Scala IDE for Eclipse plugin and the Play2 support in Scala IDE plugin. Note that the Play2 support in Scala IDE plugin is listed under the Scala IDE plugins checkbox.
I was unable to get this working at all starting from bare Eclipse, as many sources have suggested doing. The problem seems to be incompatible dependencies that only show up after much wasted time. The Scala IDE route eliminated this problem.
Yes. That's Scala IDE.
Update Site for Eclipse Juno and Kepler: http://download.scala-ide.org/sdk/e38/scala210/stable/site
Install with the following features:
Scala IDE for Eclipse
Scala IDE Plugins (incubation)
I use Scala IDE from http://scala-ide.org/ , then eclipsify my play2 project and import.
It works like a charm: it compiles my scala/java code.
You can get more details at this URL http://scala-ide.org/docs/tutorials/play20scalaide20/index.html