How to change double i = Math.random(); value to (int) value

Question

I am trying to find out how to convert a given double value to integer, which is, to conver double myNumber = Math.random() to (int) value. Here is the sample program look like this.
Thank you for the help.
import javax.swing.JOptionPane;
public class numbers
public static void main(String[] args)
int upperLimit = Integer.parseInt(JOptionPane.showInputDialog
(null, "Enter the upper range integer."));
double myNumber = Math.random();
//Test of Random numbers.
System.out.println("The Upper random number limit is: " +
myNumber * upperLimit);
} //End of main.
} // End of class.

Answer 1

Not sure exactly what you want and why you want to change the double to an int. I'm assuming by this you want to generate random integers, from 1 to the upper limit the user enters? If so, this is how I would do it:import java.util.*;
import javax.swing.*;
public class Numbers
    public static void main(String[] args)
        int upperLimit = Integer.parseInt(JOptionPane.showInputDialog(null, "Enter the upper range integer."));
        Random r = new Random();
        int myNumber = r.nextInt(upperLimit) + 1;
        System.out.println(myNumber);
}