Oracle JDeveloper 4K Display (3840×2160) Resolution Problem on Windows 10

 There were a lot of issues observed when running JDeveloper 12c in high resolution on Windows 10

The issues include:

• JDeveloper Buttons, Icons, Menu are illegible
• Fonts are too small

Issues observed in environment:

• Windows 10 (x64)
• Java 1.7.080
• JDeveloper 12c (12.1.3/12.2.2.4)
• Screen Resolution: 3840×2160 (4K)

Solution

•  Create a shortcut for JDeveloper on desktop then right click on it; Select “Properties” and go to “Compability” tab, find “Change high DPI settings” button at bottom and click on it. 
• Check the option “Override high DPI scaling behavior. Scaling performed by: System”. Finally click OK, click Apply!  

 

 

Setup Heap Limits for JDeveloper 12c/11g

The reasons JDeveloper can run out of memory include heap limits and large files.

Heap Limits

Files that control the amount of memory afforded to the JVM for JDeveloper upon startup, relative to the jdeveloper/ide/bin/ directory, include:

• jdev.conf
• ide.conf

Update these files as follows:

1. Quit JDeveloper.
2. Edit ide.conf.
3. Append the following

   AddVMOption -Xms256M
   AddVMOption -Xmx1024M
   

4. Edit jdev.conf.
5. Find the AddVMOption for the "heap size."
6. Change the values as follows:

   AddVMOption -Xmx1024M
   AddVMOption -XX:MaxPermSize=1024M