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java ArrayList contains different objects

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攒了一身酷
攒了一身酷 2020-12-09 06:28

Is it possible to create ArrayList list = new ArrayList();

I mean add obje

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  • 悲&欢浪女
    悲&欢浪女 (楼主)
    2020-12-09 06:51

    You can't specify more than one type parameter unfortunately, so you'll have to find a common superclass for your types and use that. An extreme case would be just using Object:

    List list = new ArrayList();



    Be careful that you will need to cast the result to the specific type that you need if you retrieve an item (to get full functionality, not just the common one):
    


    Car c = (Car)list.get(0); 

    
    
    
             
    
                                                        
    
            
            
    
              
                
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