Passing Parameters - Randomly Generated Numbers Not Appearing

For some reason, when I test out my code, my randomly generated numbers don't appear. Here is a sample result:

> What do you want to generate, integer, double, or character?

>integer

>What is the upper limit and lower limit of the integers you want to generate?

>1

>10

>How many integers do you want to generate?

>10

>BUILD SUCCESSFUL (total time: 9 seconds)

Is this because my code is not passing my parameters correctly? I'm not sure how to fix this either.

Here is my code for reference (it's not completed at the moment)

import java.util.Scanner;
public class NewNumberCharacter {
/** Main method
* @param args */
public static void main(String[] args) {
int return_int;
double return_double;

[Code] ....