[java/en] mistake fix and add missed assignment

[Tookser]

• [x] I solemnly swear that this is all original content of which I am the original author
• [x] Pull request title is prepended with [language/lang-code] (example [python/fr-fr] or [java/en])
• [x] Pull request touches only one file (or a set of logically related files with similar changes made)
• [x] Content changes are aimed at intermediate to experienced programmers (this is a poor format for explaining fundamental programming concepts)
• [x] If you've changed any part of the YAML Frontmatter, make sure it is formatted according to CONTRIBUTING.md
  • [x] Yes, I have double-checked quotes and field names! comment didn't relate to assignment

[imba-tjd]

I would rather remove this. Nobody reads long and float from console.

[geoffliu]

@imba-tjd No matter whether people read longs and floats from console, at least this fix is better than before, since the current doc is wrong. I'll go ahead and merge.