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                            >[info] :-: 定義抽象類

abstract class Driver { }

>[info] :-: 抽象類知識總結

- 定義為抽象的類不能被實例化。
- 必須定義抽象方法，抽象方法不能有具體的功能實現，必須在子類中重新聲明
- 繼承一個抽象類的時候，子類必須定義父類中的所有抽象方法
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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