SQLDEVELOPER: JDK Not Found with JDK-11 installed

Question

when running $sqldeveloper in order to open the app it returns the next message:

Default JDK not found
Type the full pathname of a JDK installation (or Ctrl-C to quit), the path will be stored in /home/adri/.sqldeveloper/19.2.1/product.conf

I'm in ubuntu and there goes some info about my jdk installation:

$sudo update-alternatives --config java

There is 1 choice for the alternative java (providing /usr/bin/java).

  Selection    Path                                            Priority   Status
------------------------------------------------------------
  0            /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java   1081      auto mode
* 1            /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java   1081      manual mode

$ls /usr/lib/jvm/

default-java           java-1.8.0-openjdk-amd64  openjdk-11
java-11-openjdk-amd64  java-8-openjdk-amd64

$ls java-11-openjdk-amd64/bin/

jconsole

When typing java-11-openjdk-amd64 in the sqldeveloper opened terminal (as it was asked) it turns into that message:

Error: java-11-openjdk-amd64/bin/java not found or not a valid JDK

So the file 'java' is needed but I don't have it :C

Thanks for attention. Bests,

Answer 1

I'm unable to add a comment as I am a new user here but I am wondering if there is something not quite right or missing in your environment.

I just created an Ubuntu 18.04 VM to match your o/s and used the Synaptic Package Manager to install openjdk-11-jdk (which installed a couple dependent packages as well). Here are the packages this process installed:

• openjdk-11-jdk • openjdk-11-jdk-headless • openjdk-11-jre • openjdk-11-jre-headless

As thatjeffsmith mentioned the JDK is required (so that SQL Developer can use the JDWP debugging capabilities).

I then unzipped the following SQL Developer package which I had previously downloaded:

• sqldeveloper-19.2.1.247.2212-no-jre.zip

After changing to the correct directory (~/Applications/sqldeveloper/19.2/sqldeveloper in my case) I started SQL Developer as follows:

./sqldeveloper.sh

I then imported my connections from a previous export and was able to connect successfully. I only did a few tests in the Worksheet and browsing objects owned by my user but I didn't encounter any issues using OpenJDK 11.

I had previously encountered issues with OpenJDK 11 and OpenJFX 11 — you can read about that here:

A Tale: SQL Developer 19.2 on Ubuntu 18.04 with OpenJDK 11 and OpenJFX 11

The essence of that thread is that I had "pre-installed" the OpenJFX 11 libraries and that caused a conflict with the OpenJFX 12 libraries that SQL Developer installed automatically.

If you are still trying to pursue this I recommend ensuring you have a the JDK installed and verify as I have done in the following:

markwill@ubuntu18-vm01:~$ which javac
/usr/bin/javac
markwill@ubuntu18-vm01:~$ javac -version
javac 11.0.4

Answer 2

If someone is still struggling with openJDK. It won't work. For some reason it just doesn't work with openjdk (despite it used to) but it does with JDK. Just go here , download the *.rpm file and install it extracting with $sudo alien --scripts and $gdebi ./[Extracted_file]. Just provide sqldeveloper the /usr/java/jdk1.8.0_181 path.

Thanks for the comments, I was going mad...