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39 lines
1.2 KiB
Markdown
39 lines
1.2 KiB
Markdown
# Lecture for April 3rd
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## Inheritance
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The *base class*, *super class*, or *parent class* is the initial class that we are working with. Let's say that you want to *extend* the class, or add additional functionality. The class that inherits from the parent class is called the *child class*, *subclass* or *derived class*.
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## Child Class Syntax
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```java
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public class Truck extends Car {
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// Truck Appropriate Fields
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// Necessary methods for truck
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}
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```
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This code adds all the methods from Car into the Truck class. You can then add methods that is specific to a Truck into the Truck class.
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A child class has all parent fields and access to all parent methods!
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## Visibility Modifiers
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Recall the words `public` and `private`
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The `public` modifier makes the field/method accessible by any class
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The `private` modifier makes the field/method only accessible within the method itself
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The protected modifier makes the field/method accessible within the same class or any subclasses.
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## Overriding a Method
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You can override a parent class method by declaring a method in the child class with the same...
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- name
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- number of paramters
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- parameter types
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but this method would have different behavior!
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