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Add object to ArrayList at specified index

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南笙 2020-11-30 18:59

I think it\'s a fairly simple question, but I can\'t figure out how to do this properly.

I\'ve got an empty arraylist:

ArrayList list =         


        
      
      
      

        

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                (楼主)
            
              
                  
    
                2020-11-30 19:30
              
    

            
    
            
    
              
              

    You can use Array of objects and convert it to ArrayList-
    


    Object[] array= new Object[10];
array[0]="1";
array[3]= "3";
array[2]="2";
array[7]="7";

List list= Arrays.asList(array);



    ArrayList will be- [1, null, 2, 3, null, null, null, 7, null, null]
    
    
    
             
    
                                                        
    
            
            
    
              
                
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