(java) Support for Hexadecimal Floating Point Literals

[0xflotus]

Describe the issue

Which language seems to have the issue?

According to Oracle Blog Hexadecimal Floating Point Literals are supported in Java.

Are you using highlight or highlightAuto?

highlight

Sample Code to Reproduce

Cases a-h are all legal literals in Java, tested on JShell Version 13.0.2

https://jsfiddle.net/ohqapxnc/

a = 0x4fa6p2; // 81560.0
b = 0x.4p2; // 1.0
c = 0xa.ffp3f; // 87.96875
d = 0x1.0p2F; // 4.0
d2 = 0x1.p2; // 4.0
e = 0x1.0p2f; // 4.0
f = 0x1p1; // 2.0
g = 0x.3p4d; // 3.0
h = 0x1.2ep5D; // 37.75

Expected behavior

I would expect that all legal literals are highlighted as numbers.

[joshgoebel]

Tagging beginner friendly as this is probably just finding the correct regex and adding another numeric variant.

[0xflotus]

Maybe 0[xX](([a-fA-F0-9]+[a-fA-F0-9_]+[a-fA-F0-9]+|[a-fA-F0-9]+)?[\.])?([a-fA-F0-9]+[a-fA-F0-9_]+[a-fA-F0-9]+|[a-fA-F0-9]+)?[pP]([\d]+)[dDfF]? could be a possible regex to solve this?