Java swing on eclipse oxygen 4.7.3a?

Question

I am trying to use windowbuilder on eclipse oxygen 4.7.3a on macOS highSierra. it installed fine but every time I try to open the design part it displays this error

Answer 1

Uninstall Java Version and Install lower version of Java(8).Support for WindowBuilder is not provided anymore.

How to uninstall current version?(Mac)

Go to /Library/Java/JavaVirtualMachines/ to see current version of java and replace jdk1.8.0_131.jdk with yours.

1. sudo rm -rf /Library/Java/JavaVirtualMachines/jdk1.8.0_131.jdk
2. sudo rm -rf /Library/PreferencePanes/JavaControlPanel.prefPane
3. sudo rm -rf /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin
4. sudo rm -rf ~/Library/Application\ Support/Oracle/Java

Install Java 8:

https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

Then: Right click on your project and go to Properties

Make sure your configuration look like this, At the top of picture Configure Workspace settings click on it (Uncheck project specification settings) and then see image below

Apply same as in picture Then enable "project specification settings"

Restart Your Eclipse

Done!!