Checking if variable is Long or Double

Question

Is there any way to check if the varible is Double or Long before doing anything with it? Sometimes the Objects are Double and some they are Long. How can I check it before using it?

Answer 1

if (obj instanceof Double) ...

Answer 2

You could use instanceof.

public void someMethod(Object o)
{
    if ( o instanceof Long )
    {
        // do stuff
    }
    else if ( o instanceof Double )
    {
        // do stuff
    }
}