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2018-11-02-抽象类和抽象方法.html
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<p><strong>抽象类**</strong>是专门设计来让子类继承的类。抽象类一般包括一个或多个抽象方法。<strong> </strong>抽象方法<strong>**是必须被子类覆盖的方法。</strong> <strong>声明抽象类和方法格式：</strong><br><figure class="highlight axapta"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">abstract</span> <span class="class"><span class="keyword">class</span> <类名></span></span><br><span class="line"><span class="class"></span></span><br><span class="line"><span class="class"></span>{ 成员变量；</span><br><span class="line"></span><br><span class="line"> 方法（）{ 方法体 }； <span class="comment">//定义一般方法</span></span><br><span class="line"></span><br><span class="line"> <span class="keyword">abstract</span> 方法( ); <span class="comment">//定义抽象方法</span></span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure></p>
<p><strong>抽象方法不用实现代码，而是在子类中实现所有的抽象方法。</strong> </p>
<p><strong>对于成员方法，不能同时用</strong><br><strong>static**</strong>和<strong>**abstract</strong><br><strong>说明。对于类，不能同时用**</strong>final<strong><strong>和</strong></strong>abstract<strong>**说明。</strong></p>
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