Many programming languages allow passing objects by reference or by value. In Java, we can only pass object parameters by value. This imposes limits and also raises questions.

When the code is first executed, we will enter the main() method and initialize number to the value of 10.; We will then output the value of number before calling the change() method.; In the change() ...

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.