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How do I copy the contents of one ArrayList into another?

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傲寒
傲寒 2020-11-27 10:46

I have some data structures, and I would like to use one as a temporary, and another as not temporary.

ArrayList myObject = new ArrayList

        
      
      
      

        

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                 攒了一身酷 
              
              
    
                
                   攒了一身酷
                                             
                
                
                (楼主)
            
              
                  
    
                2020-11-27 11:15
              
    

            
    
            
    
              
              

    You can use such trick:
    


    myObject = new ArrayList(myTempObject);



    or use 
    


    myObject = (ArrayList)myTempObject.clone();



    You can get some information about clone() method here
    


    But you should remember, that all these ways will give you a copy of your List, not all of its elements. So if you change one of the elements in your copied List, it will also be changed in your original List.
    
    
    
             
    
                                                        
    
            
            
    
              
                
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