Is there a difference between creating an object and then passing it to ArrayList Or directly creating an object in ArrayList.add method? In case of memory use and performance? Example:
ArrayList<ClassX> arrayList = new ArrayList();
//Type 1:
ClassX object = new ClassX();
arrayList.add(object);
//Type 2:
arrayList.add(new ClassX());
Logically? No - Both serve the same purpose.
Space? Yes. In type1: A reference will get created in stack hence extra memory allocation. And the object can now be accessed by either the reference variable or array list index.
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