Preferring JRE over JDK

[rambaut]

I'm submitting a…

• bug report
• feature request
• other

Short description of the issue/suggestion:
The current behaviour seems to be to prefer a JRE installed in /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/ over a JDK installed in /Library/Java/JavaVirtualMachines/

Why is this the preferred order of preference?

[tofi86]

I assume you are using the latest version of the stub?

There is no real precedence of JRE over JDK or vice-versa.

This is from the syslog from one of my apps:

[JavaSearch] ... found JVM: 9.0.1:/Library/Java/JavaVirtualMachines/jdk-9.0.1.jdk/Contents/Home/bin/java
[JavaSearch] ... found JVM: 9:/Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home/bin/java
[JavaSearch] ... found JVM: 1.8.0_144:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/bin/java
[JavaSearch] ... found JVM: 1.7.0_79:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/bin/java
[JavaSearch] ... found JVM: 10.0.2:/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java

The script first adds all the JDK's found to an array of available JVM's (https://github.com/tofi86/universalJavaApplicationStub/blob/master/src/universalJavaApplicationStub#L534-L540).

Then, if available, the Apple or Oracle JRE's are added to the same array (https://github.com/tofi86/universalJavaApplicationStub/blob/master/src/universalJavaApplicationStub#L544-L552).

In case you specified any JVM min/max version we delete every non-matching JVM from the array.

In any case after that, the JVM array is beeing sorted by JVM version number (https://github.com/tofi86/universalJavaApplicationStub/blob/master/src/universalJavaApplicationStub#L650-L653) and the first executable JVM is then selected for execution (https://github.com/tofi86/universalJavaApplicationStub/blob/master/src/universalJavaApplicationStub#L656-L674).

This can either be a JRE or JDK version, no preference of one over the other.

Preferring JRE over JDK or vice-versa is currently a "missing feature" as stated in the readme (https://github.com/tofi86/universalJavaApplicationStub#missing-features).

Hope that helps.