How Do I Check Java Version on Unix?

How do I check my version of Java?

Option 2: Check Java Version on Windows Using Command Line

1. Open the Windows Start menu in the bottom-left corner and type cmd in the search bar.
2. Then, open the Command Prompt once it appears in the search results.
3. A new window with the command prompt should appear. In it, type the command java -version and hit Enter.

24 авг. 2020 г.

How do I know if I have JDK or OpenJDK?

You can write a simple bash script to check this out:

1. Open any text editor (preferrably vim or emacs).
2. create a file named script.sh (or any name with the . …
3. paste the following code in it: #!/bin/bash if [[ $(java -version 2>&1) == *”OpenJDK”* ]]; then echo ok; else echo ‘not ok’; fi.
4. save and exit the editor.

24 сент. 2016 г.