Set-up Main Menu

Hi everyone

I have created separate four class:

and I want to setup a main menu, so if a user press 1, then it goes to the Annulus Class, if a user press 2, it goes to Diameters Class and if a user press 3, it goes to the Circumference class.

I've spent all day trying to figure it out how I can set up a menu. I've attach my work what I've done so far. Can you help me please?

Many thanks!

Code:

---


public class MainMenu

{
        public static CheckLinesIn CLI = new CheckLinesIn();
        public static Annulus A = new Annulus();
        public static Diameters D = new Diameters();
        public static Circumferences C = new Circumferences();
       

public static void menu (String[] args)
{

---

well you're on the right track but just a note your public static void menu (String[] args) is suppose to be main not menu. here's the basic code of how u can do this. have fun coding

Code:

---

import java.io.*;

public class MainMenu
{
      public static CheckLinesIn CLI = new CheckLinesIn();
      public static Annulus A = new Annulus();
      public static Diameters D = new Diameters();
      public static Circumferences C = new Circumferences();
     
      public static void main (String[] args) throws IOException  //throws IOException doesn't report any erros
      {          //main not menu!
            String input = new String();
           
            System.out.println("Please enter a choice");
            System.out.println("1. CheckLinesIn");
            System.out.println("2. Annulus");
            System.out.println("3. Diameters");
            System.out.println("4. Circumferences");
           
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            input = br.readLine();
           
            if(input.equals("1"))
            {
                  CLI.menu();
            }
            else if (input.equals("2"))
            {
                  A.menu();
            }
            else if (input.equals("3"))
            {
                  D.menu();
            }
            else if (input.equals("4"))
            {
                  C.menu();
            }
      }
}

class CheckLinesIn
{
      public static void menu ()
      {
            System.out.println("In class CheckLinesIn");
      }
}

class Annulus
{
      public static void menu ()
      {
            System.out.println("In class Annulus");
      }
}

class Diameters
{
      public static void menu ()
      {
            System.out.println("In class Diameters");
      }
}

class Circumferences
{
      public static void menu ()
      {
            System.out.println("In class Circumferences");
      }
}

---

Red Baron,

Many thanks for the coding, I now realised how the main menu works!

Now, I have one more feature that requires to add is that after a user selected a menu, and perform the calculation, I want the program to ask the user if they wish to perform another calculation.

Eg: 'Do you want to perform another calculation? (y/n)' and if the user press y or Y then it starts to the main menu asking the user to select which calculation. If the user press n or N then program stops.

I can't figure out how I can do this?

Can you please help?

Code:

---

import java.io.*;

public class MainMenu
{
      public static CheckLinesIn CLI = new CheckLinesIn();
      public static Annulus A = new Annulus();
      public static Diameters D = new Diameters();
      public static Circumferences C = new Circumferences();
     
      public static void main (String[] args) throws IOException  //throws IOException doesn't report any erros
      {          //main not menu!
            String input = new String();
           
            for(;;)
            {
                  System.out.println("Please enter a choice");
                  System.out.println("1. CheckLinesIn");
                  System.out.println("2. Annulus");
                  System.out.println("3. Diameters");
                  System.out.println("4. Circumferences");
           
                  BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
                  input = br.readLine();
           
                  if(input.equals("1"))
                  {
                        CLI.menu();
                  }
                  else if (input.equals("2"))
                  {
                        A.menu();
                  }
                  else if (input.equals("3"))
                  {
                        D.menu();
                  }
                  else if (input.equals("4"))
                  {
                        C.menu();
                  }
           
                  System.out.println("Do you want to perform another calculation? y/n");
                  input = br.readLine();
           
                  if (input.equals("n") || input.equals("N"))
                  {
                        break;
                  }
                  //no need for continue cause of infinite loop
            }
      }
}

class CheckLinesIn
{
      public static void menu ()
      {
            System.out.println("In class CheckLinesIn");
      }
}

class Annulus
{
      public static void menu ()
      {
            System.out.println("In class Annulus");
      }
}

class Diameters
{
      public static void menu ()
      {
            System.out.println("In class Diameters");
      }
}

class Circumferences
{
      public static void menu ()
      {
            System.out.println("In class Circumferences");
      }
}

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