Question

Say I have a Person class and I am trying to create a list as;

Person p1 = new Person("first", "id1");         
Person p2 = new Person("dummy", "id1"); 
Person p3 = new Person("second", "id2");         
Person p4 = new Person("third", "id1");         
List<Person> asList = Arrays.asList(p1, p2, p3, p4); 

Now my question is instead of passing the indivdual Person objects to Arrays.asList()

can I pass a combined list, something like

List<Person> asList = Arrays.asList(combinedPersonObjs); 

I have tried many things, but am getting casting errors.

Please help

Note: The number of Person objects is dynamic.

Answer 1

Sure, you can do

Person[] combinedPersonObjs = { p1, p2, p3, p4 };
List<Person> asList = Arrays.asList(combinePersonObjs);

If you don’t know the number of Person objects in advance, then presumably you don’t have one variable identifier for each object. I suggest you simply do something like

List<Person> asList = new ArrayList<Person>();
for (int i = 0; i < numberOfPersons; i++)
    asList.add(new Person(ithName(i), "id" + i));