Question

Write a java program making use of methods that finds the smallest of any three numbers that the user inputs. You must use JoptionPane to input the three numbers. A first method must be called and used to develop logic to find the smallest of the three numbers. A second method must be used to print out that smallest number found.

Answer 1

import javax.swing.*;

public class FindSmallest {

    public static int smallest(int n1, int n2, int n3) {
        int min = n1;
        if (n2 < min) min = n2;
        if (n3 < min) min = n3;
        return min;
    }

    public static void printSmallest(int min) {
        JOptionPane.showMessageDialog(null, "Smallest number is " + min);
    }

    public static void main(String[] args) {
        int n1 = Integer.parseInt(JOptionPane.showInputDialog("Enter first number"));
        int n2 = Integer.parseInt(JOptionPane.showInputDialog("Enter first number"));
        int n3 = Integer.parseInt(JOptionPane.showInputDialog("Enter first number"));
        
        int min = smallest(n1, n2, n3);
        printSmallest(min);
    }
}