How do I check my JDK version?

Related questions

1. Is Jdk the same as Java?
2. What is latest Java version?
3. What JRE 7?
4. Where is JDK in Ubuntu?
5. Where is JDK installed Linux?
6. Should I install JDK or JRE?
7. Is Oracle charging for Java?
8. Is Jdk free for commercial use?
9. What version of JDK do I have Mac terminal?
10. How do I make sure JDK is installed?

Tags

1. #correctly
2. #start
3. #system
4. #listed
5. #panel
6. #prompt
7. #features
8. #control
9. #version
10. #command
11. #check
12. #environment
13. #program
14. #there
15. #installed
16. #advanced
17. #variables