You might know that Java passes by value, but it helps to understand why. Here's what happens when you pass mutable and immutable object references in Java.

Along with a ton of other things, of course. Java introduced the concept of "single abstract method" types to do function pointer-like things. Lambdas can be used as SAM types instances.

Copying objects is a common Java programming operation that has one serious trap. Here's how to avoid copying from an object reference and only copy the instance and values you want. Copying objects ...