Java Non-Primitive Data Types: Understanding Reference Types

Explore non-primitive data types in Java, which are reference types that point to objects. This guide highlights key differences between primitive and non-primitive data types, including their creation, method capabilities, and value handling. Learn how non-primitive types, such as String and arrays, differ from primitive types like int and float, enhancing your understanding of data management in Java.

Java Non-Primitive Data Types

Non-primitive data types in Java are reference types that refer to objects. Here are some key differences between primitive and non-primitive data types:

• Primitive types are predefined in Java, while non-primitive types are created by the programmer (except for String).
• Non-primitive types can call methods to perform operations, whereas primitive types cannot.
• Primitive types always have a value, while non-primitive types can be null.
• Primitive types start with a lowercase letter (e.g., int, float), while non-primitive types start with an uppercase letter (e.g., String, Array).

Examples of non-primitive types include Strings, Arrays, Classes, Interfaces, etc. You will learn more about these in later chapters.