I downloaded the Oracle SQLDeveloper, but when I opened it, it said that it requires a minimum of Java 8 and gave me the website for the download. I went on and downloaded Java 10.0.1, but when I went back on to open SQL, it continued saying it required a minimum of Java 8.

I checked that the Java 10.0.1 had installed correctly, and I'm pretty sure it has. It shows up in System Preferences and when clicked, it opens the Java Control Panel fine.

I had also found someone recommending trying this command:

c:\Program Files\Oracle\sqlcl\17.3\sqlcl\bin>java -version

After trying this in the Terminal, I ended up with command not found.

I'm on a MacOS X El Captain 10.11.6.

解决方案

This is counter-intuitive as other programs runs under at least X version of a software (not only X version). I kept downloading Java 11 with no luck.

After 1 failed attempt a month ago and two hours of searching today, I found this easy fix worked for me.

Solution

Delete the following Java files and folders on your mac.

/Library/Internet Plug-Ins/JavaAppletPlugin.plugin

/Library/Java/JavaVirtualMachines/(delete current java folder)

Launch SQLDeveloper.