Question

The first index is set to null (empty), but it doesn’t print the right output, why?

//set the first index as null and the rest as "High"
String a []= {null,"High","High","High","High","High"};

//add array to arraylist
ArrayList<Object> choice = new ArrayList<Object>(Arrays.asList(a)); 

for(int i=0; i<choice.size(); i++){
   if(i==0){
       if(choice.get(0).equals(null))
           System.out.println("I am empty");  //it doesn't print this output
    }
}

Answer 1

I believe what you want to do is change,

if(choice.get(0).equals(null))

to

if(choice.get(0) == null))