Java JOptionpane show Input Dialog

import javax.swing.JOptionPane;

public class Lautturi {

	public static void main(String[] args) {
		int max;

		String num1Str = JOptionPane.showInputDialog("Please enter an integer: ");
		String num2Str = JOptionPane.showInputDialog("Please enter another integer: ");
		int num1 = Integer.parseInt(num1Str);
		int num2 = Integer.parseInt(num2Str);
		max = Math.max(num1, num2);
		JOptionPane.showMessageDialog(null, "Max: " + max);
	}
}