Before moving to Ubuntu I used IntelliJ on Windows. When I used ctrl + left click IDE showed me implementation with comment description above each method and class. But now implementation is shown without comments. How can I set that?
It depends if the class you're looking at also has sources attached, either through the IDE or through your dependency manager. If there are no sources available, then all you can receive is the decompiled version.
You will have to attach sources to the library you wish if you want to see the full implementation.
I cleared it up. The point was that I installed OpenJDK from default set Ubuntu repositories that doesn't have sources attached. The solution was to install official Oracle JDK like I did before. To do it, add Oracle's repository to your system and install jdk: https://tecadmin.net/install-oracle-java-8-ubuntu-via-ppa/
Related
I've installed the version 2018.1 of IntelliJ IDEA (COMMUNITY EDITION), which added support for Java 10.
When I tried to use new "var" to type local variable, the IDE highlights it with red colour and the lovely phrase: "Cannot resolve the type "var". Please see attachment
varRed
I've read another post that happens exactly the same issue in which a member gave a possible solution https://stackoverflow.com/a/49719734/9478809
I've done that as well, I've created a live template for that type for Java statement but it still doesn't work.
Some of you got any suggestion for that?
I will appreciate your help
Thanks in advance.
To expand on nullpointer's comment, there are a few things you need to verify:
Make sure you've downloaded an updated SDK (version 10 or higher). I recommend using sdkman to install the SDK because it helps manage multiple versions. SDKMAN
Hit cmd; to open Project Structure
For Project SDK, select your updated java SDK
For Project language level, select the corresponding level
Now navigate to Modules, and make sure the correct language level is selected here too. I recommend selecting "Project default" to avoid future confusion.
As a troubleshooting step, it's also helpful to compile on the command line with maven or gradle to make sure it is an IDE configuration issue.
I have problem importing import "javafx.util.Pair" into my program.
after searching the net I've found this answer cannot resolve symbol javafx.application in IntelliJ Idea IDE and I've installed desired jar file but still I've problem to import.
this is what I face to when open java jdk.
I don't know the why the "jfxrt.jar" is different.
note the black arrow on the folder icon
open the File | Project Structure dialog, there under Platform Settings select SDKs and then your JDK 1.8. On the right you then see all the jars that make up the classpath to your SDK. Make sure that your jfxrt.jar is in that list, if not, you can add it by clicking the '+' button at the bottom.
Update May 2020
JavaFX is no longer part of the Oracle or OpenJDK default distributions. Instead it is available as a seperate library or module set.
For instructions on using JavaFX in your application, see the documentation at:
https://openjfx.io
For instructions on working with a modern JavaFX installation and Idea, also see the related question:
IntelliJ can't recognize JavaFX 11 with OpenJDK 11
You don't need to "install the desired jar" (whatever that means).
You don't need to do that for JavaFX. You should not do anything explicitly with jfxrt.jar either in the filesystem or by adding it to a project classpath. If doing something on the filesystem, that is especially bad as jfxrt.jar is not made to be standalone and requires related native libraries shipped with the JDK in order to work.
The JavaFX code should be part of the JDK installation you are using. Perhaps you are using a Java version below 8 or an OpenJDK implementation that does not include JavaFX. If so, then install the Oracle JDK 8+ and set idea to use it. Everything should just work then and all of related JavaFX imports will resolve.
I recently started using Ubuntu and installed netbeans 6.9.1. I seem to be missing some javadocs tho that get installed with the windows version.
Basically the netbeans docs are there but when the code completion comes up it only tells me the function prototype. Where theres usually a description it says that the javadocs are not found and they should be added in the platform or library manager.
Basically I just want the docs explaining the methods for basic java, swing, and awt. Anyone know what files it is i want to be getting, and can I do it all with apt-get?
OS:
Ubuntu 10
Probably you have not installed java-doc package:
sudo apt-get install sun-java6-doc
or what ever is suitable for you.
I had the same problem. Solution is very simple:
You have to download "Java SE 6 Documentation" from this page (in Additional Resources list)
http://www.oracle.com/technetwork/java/javase/downloads/index.html
It is a zip file (~50 mb). Put this file to some place you like(I suggest you to put it to the JDK directory, but you can put it to your home directory) and then open NetBeans.
Select Tools -> Java Platforms. Then select JDK on the left window. In the Javadoc tab, click Add ZIP/Folder and choose file you recently download.
When you done this, your javadoc in code completition windows will work correctly.
I'd like to know how to setup IntelliJ to point to the JDK documentation so the documentation popups that display during code completion will show me what the function I'm looking at is going to do. For some reason IntelliJ isn't able to find the JavaDocs by default.
I'm also not 100% sure that the documentation is installed with the JDK that's installed with the OS. I don't see them in /System/Library/Frameworks/JavaVM.framework/ but I may be looking in the wrong place. If it's not included, I'd also like to know what needs to be downloaded and where it needs to be installed to get the JavaDocs for the JDK to show up in IntelliJ.
I had to combine the responses I got to this point and add a few extra details so I'm answering my own question.
Search for "Java developer" from Downloads for Apple Developers
Download and install "Java for Mac OS X 10.6 Update 9 Developer Package" (or later).
In IntelliJ, open File -> Project Structure.
Click on "SDKs" under "Platform Settings".
Add the following paths under the "Documentation Paths" tab (the paths may be different based on which JDK you're using):
/Library/Java/JavaVirtualMachines/1.6.0_29-b11-402.jdk/Contents/Home/docs.jar!/docs/api
/Library/Java/JavaVirtualMachines/1.6.0_29-b11-402.jdk/Contents/Home/appledocs.jar!/appledoc/api
Add the following path under the Sourcepath tab:
/Library/Java/JavaVirtualMachines/1.6.0_29-b11-402.jdk/Contents/Home/src.jar!/src
Thanks, #Yishai for the download location and #Gareth Davis for the location of the documentation after installing.
Update for 10.7/10.8 [Mountain] Lion:
Steps are the same except for these changes:
In step 2, download "Java for OS X 2012-005 Developer Package" (or later).
Use these paths instead in step 5.
/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Home/docs.jar!/docs/api
/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Home/appledocs.jar!/appledoc/api
Use these paths instead in step 7.
/Library/Java/JavaVirtualMachines/1.6.0_35-b10-428.jdk/Contents/Home/src.jar!/src
Quick (and dirty?) solution: Point IntelliJ to http://download.oracle.com/javase/6/docs/api/
have you installed the Apple Java Developer package?
It provides src.jar and docs.jar in /Library/Java/JavaVirtualMachines/1.6.0_22-b04-307.jdk/Contents/Home
Note this is since update 3. If these are present Intellij will just find them, or at least mine did.
details are in the Java update release notes
This should tell you what you need to know: Get local copies of Mac OS X Java source code and Javadoc – Concord Consortium wiki.
That page recommends going to https://connect.apple.com and downloading and installing “Java for Mac OS X 10.5 Update 2 Developer Documentation (Disk Image)” or the equivalent newer release. It describes a few ways to view the documentation, based on the Java jar file being located at a path like this:
/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Home/src.jar
I want to generate the javadocs for an open-source code-base I'm using. But I'm being asked for a "Javadoc Command" by the Eclipse Generate JavaDoc wizard and the help doesn't explain what this means. Is it wanting the path to the javadoc binary/jar or something else?
Yes, presumably it wants the path to the javadoc command line tool that comes with the JDK (in the bin directory, same as java and javac).
Eclipse should be able to find it automatically; are you perhaps running it on a JRE? That would explain the request.
Yes, it is asking for the application/executable that is capable of creating Javadoc. There is a javadoc executable inside the jdk's bin folder.
You may need to add a JDK (Java Development Kit) to the installed JRE's within Eclipse
Go to Window->Preferences->Java->Installed JRE's
In the Name column if you do not have a JDK as your default, then you will need to add it.
Click the "Add" Button and locate the JDK on your machine.
You may find it in this location: C:\Program Files\Java\jdk1.x.y
Where x and y are numbers.
If there are no JDK's installed on your machine then download and install the Java SE (Standard Edition) from the Oracle website.
Then do the steps above again. Be sure that it is set as the default JRE to use.
Then go back to the Projects->Generate Javadoc... dialog
Now it should work.
Good Luck.
Had this problem and solved typing this : C:\Program Files (x86)\Java\jdk1.7.0_51\bin\javadoc.exe
There are already useful answers to this question above, however there is one more possibility which I don't see being addressed here.
We should consider that the java is installed correctly (that's why eclipse could have been launched in the first place), and the JDK is also added correctly to the eclipse. So the issue might be for some reason (e.g. migration of eclipse to another OS) the path for javadoc is not right which you can easily check and modify in the javadoc wizard page. Here is detailed instructions:
Open the javadoc wizard by Project->Generate Javadoc...
In the javadoc wizard window make sure the javadoc command path is correct as illustrated in below screenshot: