Introduction to Variables
Explore the fundamental concepts of variables in Java including data types, the difference between primitive and reference variables, scope rules, and default assignments. Learn through coding examples how local variables behave and how references point to objects in memory, helping you understand call by value and call by reference concepts.
In this lesson, we will talk about the different types of variables and data types. It will include a reference variable that acts as a handle to the newly created object. There are a few rules and conventions that we should follow when we design and write the state of an object. Besides int or boolean, there are other data types; moreover, we should have a clear idea about assigning values to the variables. If we do not explicitly initialize them, are they assigned default values? Let’s learn all the techniques through examples.
Coding example: 14
In this example, we will talk about the core concept of Java. We know that local variables store their values in the ‘Stack’, whereas, the newly created objects are stored in ‘Heap’. However, the reference variable that acts as a handle to the object is stored in ‘Stack’. ...