Classes and The Object Class
Explore how Java classes define the state and behavior of objects and the universal Object class that connects them. Learn safe type checking with pattern matching, the difference between reference identity and object equality, and why overriding equals and hashCode correctly is essential. Understand Java's approach to object lifecycle and memory cleanup to build predictable, well-integrated custom types.
We'll cover the following...
In Java, a class acts as a blueprint for creating objects. It defines the state and behavior that its instances will possess. Whenever we create a new application, we are essentially designing a collection of classes that interact with one another to solve a problem.
Let us explore the foundational concepts of classes and the universal root class that binds them all together.
What is the Object class and what methods does it define?
How can we determine whether an object passed into a method is an Integer or a String?