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105 lines
3.7 KiB
HTML
105 lines
3.7 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8" />
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<meta name="author" content="Brandon Rozek">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta name="robots" content="noindex" />
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<title>Brandon Rozek</title>
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<link rel="stylesheet" href="themes/bitsandpieces/styles/main.css" type="text/css" />
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<link rel="stylesheet" href="themes/bitsandpieces/styles/highlightjs-github.css" type="text/css" />
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</head>
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<body>
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<aside class="main-nav">
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<nav>
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<ul>
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<li class="menuitem ">
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<a href="index.html%3Findex.html" data-shortcut="">
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Home
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</a>
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</li>
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<li class="menuitem ">
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<a href="index.html%3Fcourses.html" data-shortcut="">
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Courses
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</a>
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</li>
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<li class="menuitem ">
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<a href="index.html%3Flabaide.html" data-shortcut="">
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Lab Aide
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</a>
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</li>
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<li class="menuitem ">
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<a href="index.html%3Fpresentations.html" data-shortcut="">
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Presentations
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</a>
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</li>
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<li class="menuitem ">
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<a href="index.html%3Fresearch.html" data-shortcut="">
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Research
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</a>
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</li>
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<li class="menuitem ">
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<a href="index.html%3Ftranscript.html" data-shortcut="">
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Transcript
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</a>
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</li>
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</ul>
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</nav>
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</aside>
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<main class="main-content">
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<article class="article">
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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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</article>
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</main>
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