Question

Please edit my following JAVA code so that there is no main function. I would like one function in this class that completes what the current program is trying to do so that I can call this class in my main class which will be separate.

import java.math.RoundingMode;
import java.text.DecimalFormat;
import java.util.Scanner;

public class enterwklyincme {

    private static DecimalFormat df = new DecimalFormat("0.00");

    public static float readFloat(Scanner reader) {
        float num;
        while (true) {
            try {
                num = Float.parseFloat(reader.nextLine());
                return num;
            } catch (Exception e) {
                System.out.println("Please enter a numerical value.");
            }
        }
    }

    public static void main(String args[]) {

        float weeklyIncome;

        Scanner in = new Scanner(System.in);

        System.out.println("What is you weekly income?");

        weeklyIncome = readFloat(in);

        while (weeklyIncome < 0) {
            System.out.println("Please enter a value of 0 or higher.");

            weeklyIncome = readFloat(in);
        }
        System.out.println("Weekly income of $" + df.format(weeklyIncome) + " has been saved to your user profile!");
    }
}

Answer 1

import java.math.RoundingMode;
import java.text.DecimalFormat;
import java.util.Scanner;
class enterwklyincme {
    DecimalFormat df = new DecimalFormat("0.00");
    Scanner in = new Scanner(System.in);
    public void readFloat() {
        float num;
        System.out.println("What is you weekly income?");
        while (true) {
            try {
                num = Float.parseFloat(in.nextLine());
                break;
                }
            catch (Exception e) {
                System.out.println("Please enter a numerical value.");
                }
        }
        while(num<0)
        {
             System.out.println("Please enter a value of 0 or higher.");
           while (true) {
            try {
                num = Float.parseFloat(in.nextLine());
                break;
                }
                catch (Exception e)
                {
                System.out.println("Please enter a numerical value.");
                }
          
                }
        }
       System.out.println("Weekly income of $" + df.format(num) + " has been saved to your user profile!");

      
    }
}
public class Main{
    public static void main(String args[]) {

        enterwklyincme ob=new enterwklyincme();
        ob.readFloat();
      
            }
}

output

input What is you weekly income? -5 Please enter a value of 0 or higher. Weekly income of $4.00 has been saved to your user profile! ... Program finished with exit code o Press ENTER to exit console.

input What is you weekly income? -5 Please enter a value of 0 or higher. Weekly income of $4.00 has been saved to your user profile! ... Program finished with exit code o Press ENTER to exit console.