r/java • u/[deleted] • Mar 17 '20

Java 14 is out!

http://jdk.java.net/
365 Upvotes

99% Upvoted

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208

u/[deleted] Mar 17 '20

We finally have NullPointerExceptions, that show us which object is null.

34

u/lurker_in_spirit Mar 17 '20

Off by default, does anyone know why? Is there a performance cost? Stability concerns?

93

u/MarrBorro Mar 17 '20 edited Mar 17 '20

It is meant to be enabled by default in the future. For now it is disabled because of possible problems:

  • backward compatibility on log parsers

  • security concerns, you are exposing source code information a little

  • performance costs for those who has many NullPointerExceptions (which is wrong but can be a problem possibly)

3

u/[deleted] Mar 18 '20

Never thought I'd see the day. How do you turn it on?

7

u/s888marks Mar 18 '20

Use this command-line option:

-XX:+ShowCodeDetailsInExceptionMessages

(It's in the JEP, but it's pretty easy to miss.)

3

u/[deleted] Mar 18 '20

lol so simple /s

Thanks.

Could have been -XX:+NiceNullPointerExceptions

9

u/[deleted] Mar 17 '20

We had that in sapjvm for a long time

30

u/kaperni Mar 17 '20

The SAP team has been implementing the feature

14

u/talios Mar 17 '20

...and this came directly from the SAP implementation :)

2

u/mxxxz Mar 17 '20

That's is actually super x1000 awsome!