What does a class in java contain?

The components of a class include: fields, methods, constructors, modules, internal classes, abstract methods, static members and interfaces. These components together define the properties and behavior of the object, making Java code more robust and more efficient. Easy to maintain.

Composition of classes in Java

Classes are data types that describe objects in Java programming. The class contains the following components:

1. Field

• Stores data related to the object
• Can be a basic type ( Such as int, boolean) or reference type (such as String, Object)

2. Method(Method)

• Perform operations on objects
• Can be defined as void (no return value) or return a specific type of value

3. Constructor(Constructor)

• Called when creating a new object
• is used to initialize the object and set the initial value

4. Modifier

• Control the visibility and access permissions of classes, fields and methods
• Commonly used modules are public, private, and protected

5. Inner Class(Inner Class)

• Nested in another class
• Can access the fields and methods of the external class

6. Abstract Method )

• Contains only method signature (not implementation)
• Must be implemented in subclasses

7. Static members (Static Member)

• Belongs to the class itself, not to a specific object
• Can be accessed directly through the class name

##8. Interface

Defines a set of methods, but does not implement them
• Aims to force subclasses to implement these methods

By understanding With these components of classes, you can write robust and maintainable Java code.

The above is the detailed content of What does a class in java contain?. For more information, please follow other related articles on the PHP Chinese website!