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			105 lines
		
	
	
	
		
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			HTML
		
	
	
	
	
	
			
		
		
	
	
			105 lines
		
	
	
	
		
			3.7 KiB
		
	
	
	
		
			HTML
		
	
	
	
	
	
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    <h1>Lecture for April 3rd</h1>
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<h2>Inheritance</h2>
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<p>The <em>base class</em>, <em>super class</em>, or <em>parent class</em> is the initial class that we are working with. Let's say that you want to <em>extend</em> the class, or add additional functionality. The class that inherits from the parent class is called the <em>child class</em>, <em>subclass</em> or <em>derived class</em>.</p>
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<h2>Child Class Syntax</h2>
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<pre><code class="language-java">public class Truck extends Car {
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    // Truck Appropriate Fields
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    // Necessary methods for truck
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}</code></pre>
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<p>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.</p>
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<p>A child class has all parent fields and access to all parent methods!</p>
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<h2>Visibility Modifiers</h2>
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<p>Recall the words <code>public</code> and <code>private</code></p>
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<p>The <code>public</code> modifier makes the field/method accessible by any class</p>
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<p>The <code>private</code> modifier makes the field/method only accessible within the method itself</p>
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<p>The protected modifier makes the field/method accessible within the same class or any subclasses.</p>
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<h2>Overriding a Method</h2>
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<p>You can override a parent class method by declaring a method in the child class with the same...</p>
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<ul>
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<li>name</li>
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<li>number of paramters</li>
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<li>parameter types</li>
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</ul>
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<p>but this method would have different behavior!</p>
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