this post was submitted on 16 Jun 2023
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What are some things in the class library you wish more people knew about or used? (docs.oracle.com)
submitted 1 year ago by JackbyDev@programming.dev to c/java@programming.dev
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I'm curious if there are things in the standard class library that you find useful but not widely used.

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[โ€“] presumably_wrong@lemm.ee 1 points 1 year ago (1 children)

Instead of wrapping it in an optional you can do Objects.requireNonNullElse(value, defaultValue)

[โ€“] austin@programming.dev 1 points 1 year ago* (last edited 1 year ago)

Optional has more syntactic sugar for more complex scenarios / functional call chaining that prevents repetitive if checks

Optional.ofNullable(myObj)
  .map(MyClass::getProperty)
  .map(MyOtherClass::getAnotherProperty)
  .filter(obj -> somePredicate(obj))
  .orElse(null)

This is completely null safe, the function calls are only made if the object is not null