Add a double to a Vector?

[javaQQ]

How does one add a double to a vector?

Many thanks in advance

[smbelow]

Don't know if this is what your looking for but:

Vector vector = new Vector();
vector.addElement(new Double(value));

[Bnt]

Hi,

If you are using JDK 5 or above there is an easier way of doing. The way that smbelow suggested works fine except that you will need to cast the object you get out of the Vector to a Double before you can use it, and if you want a double primitive it will take you another step to get that from the Double wrapper object.

With JDK 5 and above generics and autoboxing make task like this easier, there is a limitation though, you need to know that all of the objects stored in the Vector will be of type Double (which is normally case since you generally know what you are adding to your collections). You declare your Vector like this:

// Tell java that you will be storing Double objects in the Vector using generics
Vector<Double> vect = new Vector<Double>();

// Using autoboxing you can add primitive double objects to the Vector without having to wrap them first (it)
double dIn = 100d;
vect.add(dIn);

// And with generics and auto-unboxing you can simply retrieve the object as a primitive without any casts

double dOut = vect.get(0);

So this approach reduces a number of steps that were required before and has the added advantage of type safety, you can only add Double objects to the list now, you will get a compile time error if you try and add anything else, where before you would get a runtime error when you try and cast a String to a Double.

Hope This Helps