Question

How would I make it so these are dialog boxes instead of just like a regular question?

Here are the instructions.

"Ask the user to input a number.  You must use an input dialog box for this input. Be sure to convert the String from the dialog box into an integer (int). The program needs to keep track of the smallest number the user entered as well as the largest number entered. Use a Confirm dialog box to ask the user if they want to enter another number. If yes, repeat the process. If no, output the smallest and largest number that the user entered.

This program only outputs the largest and smallest number once AT THE END of the program when the user wants to quit.

Also, your program should account for the case when the user only enters one number. In that case, the smallest and largest number will be the same."

Here is the code I have

import java.util.Scanner;

public class MinMax {

    public static void main(String[] args) {


        Scanner scanner = new Scanner(System.in);
        // delcare two variable min and max
        int minNumber = 0, maxNumber = 0;
        boolean firstTime = true;
        String choice = "";
        // keep asking for a number until user enter N and wants to quit
        while (true) {

            System.out.print("Enter your number: ");
            int userNumber = scanner.nextInt();
            scanner.nextLine(); // for consuming the new line charaacter
            // when the firstTime is true we assign the first number
            // to both min and max and set the firstime vlaue to False
            if (firstTime) minNumber = maxNumber = userNumber;
            // we check if the number entered is less than min, if true we set the
            // new min value to the current value
            if (userNumber < minNumber) minNumber = userNumber;
            // we check if the number entered is greater than min, if true we set the
            // new max value to the current value
            if (userNumber > maxNumber) maxNumber = userNumber;
            firstTime = false; // once we set the first value to both min and max we set this value to false
            // enter a loop until user enters either Y or N only
           while (true) {
                System.out.print("Do you want to enter again (Y for yes N for No): ");
                choice = scanner.nextLine().toUpperCase();
                if (choice.equals("Y")) break;
                else if (choice.equals("N")) break;
                else System.out.println("Please enter either Y or N only. Try again.");
            }
            if (choice.equals("N")) break;

        }
        // print both min and max values at the end
       
        System.out.println("Min: "+minNumber);

System.out.println("Max: "+maxNumber);

    }
}

Answer 1

import java.util.SortedSet;
import java.util.TreeSet;
import javax.swing.JOptionPane;
import javax.swing.JFrame;
class MinMax {
public static void main(String [] args) {
String choice="Y",test1;
int int1,min=99999,max=0,turn=1;
while(choice.equals("Y")){
//displaying a dialog box for input
test1= JOptionPane.showInputDialog("Please Enter the Number: ");
//converting input into integer
int1 = Integer.parseInt(test1);
//finding min value
if(int1<min)
min=int1;
//finding max value
if(int1>max)
max=int1;
if(turn==1){
min=int1;
max=int1;
turn=2;
}
//asking the user to continue or not
choice= JOptionPane.showInputDialog("Do you want to Continue(Y/N):");
choice=choice.toUpperCase();
}
JFrame frame = new JFrame();
//printing min value
JOptionPane.showInternalMessageDialog(frame.getContentPane(), String.format("Min %d", (min)));
//printing max value
JOptionPane.showInternalMessageDialog(frame.getContentPane(), String.format("Max %d", (max)));
}
}

Output:

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