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Java List vs ArrayList

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有刺的猬
有刺的猬 2020-12-07 01:14

As a C++ oldtimer I have managed to solve my problem but I can not wrap my head around the underlying Java mechanisms here: 

Vector x = new Vec         


        
      
      
      

        

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                   余生分开走
                                             
                
                
                (楼主)
            
              
                  
    
                2020-12-07 01:48
              
    

            
    
            
    
              
              

    List is an interface, you cannot initialize it. ArrayList implements List, so you can assign an ArrayList instance to a List variable.
    
    
    
             
    
                                                        
    
            
    
            
    
              
                
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