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Java : different double and Double in comparison

In a sample java program for one of my labs, I have two different methods taking Double and double parameters respectively.
How do I differentiate between them when passing arguments to them?

Answer 1

First off you need to understand the difference between the two types.
double is a primitive type whereas Double is an Object.

The code below shows an overloaded method, which I assume is similar to your lab code.

void doStuff(Double d){ System.out.println("Object call"); }
void doStuff(double d){ System.out.println("Primitive call"); }

There are several ways you can call these methods:

doStuff(100);
doStuff(200d);
doStuff(new Double(100));

These calls will result in:

"Primitive call"
"Primitive call"
"Object call"