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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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                (楼主)
            
              
                  
    
                2020-11-27 11:21
              
    

            
    
            
    
              
              

    Here is a workaround to copy all the objects from one arrayList to another:
    


     ArrayList myObject = new ArrayList();
ArrayList myTempObject = new ArrayList();

myObject.addAll(myTempObject.subList(0, myTempObject.size()));



    subList is intended to return a List with a range of data. so you can copy the whole arrayList or part of it.
    
    
    
             
    
                                                        
    
            
            
    
              
                
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