How to check type of variable in Java?

Question

How can I check to make sure my variable is an int, array, double, etc...?

Edit: For example, how can I check that a variable is an array? Is there some function to

Answer 1

Just use:

.getClass().getSimpleName();

Example:

StringBuilder randSB = new StringBuilder("just a String");
System.out.println(randSB.getClass().getSimpleName());

Output:

StringBuilder