Question

I have the following Vector and at runtime I want to pass it an Integer, Character, or Float:

public static Vector<Object> interestingValues = new Vector<Object>();

At the same time I want to get an Integer, Float, or Character from it, so there are two things:

• Will they retain the specific Integer/Float/Character type in the Object Vector, or they all will be stored in the form of Object?

• How can I retrieve Integer objects from this Vector?

Answer 1

Casting:

Integer i=(Integer)interestingValues.get(0);

In case you have multiple types of objects inside the Vector you could check the type using instanceof:

Object o=interestingValues.get(0);
 if (o instanceof Integer){
      Integer i=(Integer)o;
 }else if (o instanceof Long){
      Long l=(Long)o;
 }

The third thing you can do to avoid the need ov casting objects to a particular type is using a typed Vector:

Vector <Integer> integerVector=new Vector<Integer>();
integerVector.add(Integer.MAX_VALUE);
Integer i=integerVector.get(0);