The full pathname of a JDK installation for Oracle SQL Developer

Question 1

For me it was similar error. I solved it simply by inserting

SetJavaHome /usr/lib/jvm/java-7-openjdk-amd64/

into ~/.sqldeveloper/4.0.0/product.conf file.

Question 2

I Agree with szabozoltan's answer but there should be some explanation required for this:

SetJavaHome /usr/lib/jvm/java-7-openjdk-amd64/

This one we need to keep in product.conf file. Inorder to open that file we need to type following command:

sudo gedit /home/abc/.sqldeveloper/4.0.0/product.conf

After this, type the following command.

./sqldeveloper.sh

That's it, your SQL Developer will be opened.

Question 3

You only have the Java JRE installed, you need to install the JDK in order for Oracle SQL Devloper to work.

TL;DR

Install the JDK, type sudo apt-get install openjdk-7-jdk in a terminal.

Checking if JDK is Installed

To check if you have the JDK installed, type aptitude search openjdk-7-jdk in the terminal. If you see an i beside either package then it is installed. For example, I have the 64-bit JDK installed on my machine, this is the output.

$ aptitude search openjdk-7-jdk
i   openjdk-7-jdk                                   - OpenJDK Development Kit (JDK)                            
p   openjdk-7-jdk:i386                              - OpenJDK Development Kit (JDK)

If the package does not have an i beside it, then it is not installed.

Installing JDK

To install in the JDK in ubuntu you need to install the package openjdk-7-jdk. Install by running sudo apt-get install openjdk-7-jdk in a terminal.

Setting JAVA_HOME

After installing the JDK you need to set the JAVA_HOME environment variable. You can see all the installed JDKs on your machine by running update-java-alternatives -l, choose the one you want to use and copy the third field, this field is the JAVA_HOME for that JDK.

For example, on my machine

$ update-java-alternatives -l
java-1.7.0-openjdk-amd64 1071 /usr/lib/jvm/java-1.7.0-openjdk-amd64

This means I only have one JDK installed, java-1.7.0-openjdk-amd64, and its JAVA_HOME is /usr/lib/jvm/java-1.7.0-openjdk-amd64.

Next, set the JAVA_HOME environment variable, in Bash I would set it by running this from the terminal:

$ export JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-amd64

Check to make sure it was set correctly.

$ echo $JAVA_HOME
/usr/lib/jvm/java-1.7.0-openjdk-amd64

This will set JAVA_HOME for your current terminal session, to not have to worry about setting it again, you can add it to your ~/.bashrc file.

Running Oracle SQL Developer

Once the JDK is installed and the JAVA_HOME environment variable set, you can move into the sql developer directory and run the sqldeveloper.sh script.

$ cd sqldeveloper
$ ./sqldeveloper.sh

If sqldeveloper.sh is not executable run chmod +x sqldeveloper.sh and run the script again.

Checking all Java packages

For completeness, you can check what Java packages you have installed by running aptitude search openjdk-7. If you have the JRE installed you will se an i beside a package that begins with openjdk-7-jre

$ aptitude search openjdk-7
p   openjdk-7-dbg                                   - Java runtime based on OpenJDK (debugging symbols)        
p   openjdk-7-dbg:i386                              - Java runtime based on OpenJDK (debugging symbols)        
p   openjdk-7-demo                                  - Java runtime based on OpenJDK (demos and examples)       
p   openjdk-7-demo:i386                             - Java runtime based on OpenJDK (demos and examples)       
p   openjdk-7-doc                                   - OpenJDK Development Kit (JDK) documentation              
i   openjdk-7-jdk                                   - OpenJDK Development Kit (JDK)                            
p   openjdk-7-jdk:i386                              - OpenJDK Development Kit (JDK)                            
i   openjdk-7-jre                                   - OpenJDK Java runtime, using Hotspot JIT                  
p   openjdk-7-jre:i386                              - OpenJDK Java runtime, using Hotspot JIT                  
i   openjdk-7-jre-headless                          - OpenJDK Java runtime, using Hotspot JIT (headless)       
p   openjdk-7-jre-headless:i386                     - OpenJDK Java runtime, using Hotspot JIT (headless)       
i   openjdk-7-jre-lib                               - OpenJDK Java runtime (architecture independent libraries)
v   openjdk-7-jre-lib:i386                       -                                                          
p   openjdk-7-jre-zero                              - Alternative JVM for OpenJDK, using Zero/Shark            
p   openjdk-7-jre-zero:i386                         - Alternative JVM for OpenJDK, using Zero/Shark            
p   openjdk-7-source                                - OpenJDK Development Kit (JDK) source files               
p   uwsgi-plugin-jvm-openjdk-7                      - Java plugin for uWSGI (OpenJDK 7)                        
p   uwsgi-plugin-jvm-openjdk-7:i386                 - Java plugin for uWSGI (OpenJDK 7)                        
p   uwsgi-plugin-jwsgi-openjdk-7                    - JWSGI plugin for uWSGI (OpenJDK 7)                       
p   uwsgi-plugin-jwsgi-openjdk-7:i386               - JWSGI plugin for uWSGI (OpenJDK 7)

Question 4

Just solved this by not adding slash as you did, so instead of

/usr/lib/jvm/java-7-openjdk-i386/

type

/usr/lib/jvm/java-7-openjdk-i386

Question 5

Just type /usr/java/default and hit Enter if you use Oracle's JDK.

Question 6

Just insert below one into ~/.sqldeveloper/4.0.0/product.conf file.

SetJavaHome /usr/lib/jvm/java-7-openjdk-amd64/

Question 7

I had a similar issue and solved it by simply adding 'SetSkipJ2SDKCheck true' to one of the below files.

/home/abc/.sqldeveloper/4.1.5/product.conf
/opt/sqldeveloper/sqldeveloper/bin/sqldeveloper.conf

Question 8

In my case (Oracle SQL Developer 4.1.3) it seems to be problem with Java version - when I point to Java 8 JDK instead of 11, it started working immediately.

Question 9

I've faced with similar issue. Tried published recommendations but unsuccessfully. Possible the reason I'm using sdkman to manage java versions, may be something with permissions because of Mac OS.

For Mac user it is important try manage configuration:

try SetJavaHome {{path to your java}} in ~/.sqldeveloper/{{sql-dev-version}}/product.conf

this step could help if you are using jdk installed by brew following default path.

If you've installed openjdk with sdkman path to java will be like ~/.sdkman/candidates/java/{{java-version}} and this path needs to be mapped on default expectations with aliases.

I did not have information about the default path, so it needs to find executable file:

start sqldeveloper (to make shown error message);
in terminal try ps ux | grep sql - it will help you to detect executable file location sqldeveloper.sh;
open the file with text editor:
- remove or comment block that tries to get java from default location /usr/libexec/java_home;
- find line with export JAVA_HOME=$TMP_PATH and replace path with your path to java home or simply remove line if JAVA_HOME was specified in OS settings.

Question 10

In newer version I needed to extend the path in

/Users/{{yourUsername}}/.sqldeveloper/21.2.1/product.conf

SetJavaHome /Library/Java/JavaVirtualMachines/jdk-11.0.13.jdk/Contents/Home

Question 11

 apt-get install openjdk-6-jre
 apt-get install openjdk-7-jre
 apt-get install openjdk-6-jdk
 apt-get install openjdk-7-jdk
 add-apt-repository ppa:webupd8team/java
 apt-get update
 apt-get install oracle-java7-installer