JDK version mismatch on OSX

Question

I've been developing in Java on OSX without issue for a couple of issues. Yesterday, I started getting weird compiler crashes (NPEs deep in javac).

I installed JDK 1.8.0_101, but javac is reporting itself as 1.8.0_20.

$ which javac
/usr/bin/javac

$ ls -l /usr/bin/javac
lrwxr-xr-x  1 root  wheel  74 20 Sep 15:16 /usr/bin/javac -> /Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/bin/javac

$ /usr/libexec/java_home 1.8
/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home

$ echo $JAVA_HOME
Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home

$ java -version
java version "1.8.0_101"
Java(TM) SE Runtime Environment (build 1.8.0_101-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.101-b13, mixed mode)

So everything's looking all awesome, but then:

$ javac -version
javac 1.8.0_20

Does anyone have any suggestions on what might be causing it to pick up the wrong version? I've tried removing all the JVMs and reinstalling, and rebooting, and all that.

Edit

Even running javac from the target of the symlink reports the wrong version. I've also confirmed that the md5 sum of /Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/bin/javac matches that of a healthy install.

Answer 1

Go to cd /Library/Java/JavaVirtualMachines. List all files using ls.

There should be two folders jdk1.8.0_101.jdk and jdk1.8.0_20.jdk. Enter sudo rm -rf jdk1.8.0_20.jdk.

Now check java -version and javac -version ,should be the same.