Pass-by-Value with Primitives

💡 Demystifying Java Memory: Pass-by-Value with Primitives

One of the most common confusions when learning Java is understanding how variables are passed into methods. Here is the golden rule: In Java, EVERYTHING is passed by value.

When dealing with primitive data types (like int, double, boolean), Java doesn't give the method the original variable. Instead, it creates a brand new box in the memory Stack and passes a photocopy of the value.

🤔 What does this mean? If you modify the variable inside the method, your original variable remains completely untouched. They live in different blocks of memory!

I've set up a quick interactive example. Click the link below and use the "Forward" button to step through the execution. Watch closely how the Stack behaves when modifyCopy() is called!

🔗 Try the execution step-by-step here: > https://tinyurl.com/3zz7xfan

0 comments