Re: [suse-programming-e] Clearing the diplay with JAva.

4 Dec 2003

      Prabu Subroto wrote:
...
Dear my friends...
First time I use Java, I feel as if I am in new world.
I want after the user choose one of menu in main menu
than the displayed is cleared (blanken) and come the
aimed menu.
Can I use another class for this implementation? I
mean like modular programming. I make one file as the
main menu (comadmin.class) and some other files to
represent each of the options in the main menu (such
as : customer.class, product.class,etc).
How can I do that?
Thanks in advance.
ps :
here is my simple code for the detail of my
explanation.
=================
public class comadmin
{
  public static void main(String[] args)
  {
      int pilihmenu;
System.out.println("=========================================");
      System.out.println("|		Main Menu		|");
System.out.println("=========================================");
      System.out.println("|	Options :			|");
      System.out.println("|		1. Customer		|");
      System.out.println("|		2. Product Field	|");
System.out.println("=========================================");
      pilihmenu = Keyin.inChar("Please choose (1-2) : ");
      switch (pilihmenu){
      case '1' :
      	System.out.println("Opening customer menu\n");
      	customer;
      	break;
      case '2' :
break;
      }
  }
}
You can use external or internal classes. It depends on how big this program will be and who will  maintain it.
An example using internal classes:

public class comadmin {

public static void main(String[] args)
{
char pilihmenu;

System.out.println("=========================================");
// ...

pilihmenu = Keyin.inChar("Please choose (1-2) : ");
switch (pilihmenu){
case '1' :
System.out.println("Opening customer menu\n");
(new customer()).start();
break;
case '2' :
System.out.println("Opening product menu\n");
(new product()).start();
}
}

static private class customer {

//whatever....
public void start() {
System.out.println("===========");
int menu = Keyin.inChar("customer: Please choose (1-2) : ");
switch (menu){
case '1' :
System.out.println("1 pressed");
break;
}
}
}
static private class product {

//whatever....
public void start() {
System.out.println("===========");
int menu = Keyin.inChar("product: Please choose (1-2) : ");
switch (menu){
case '1' :
System.out.println("1 pressed");
break;
}
}
}

}

For the external classes just put the internal classes in other files 
and declare them as public , e.g. public class product.

Re: [suse-programming-e] Clearing the diplay with JAva.

expatriate