restart

[jp staff]

I am trying to figure out how to restart a program after I have already run through it. For instance, Would the user like to start over again, where should I place this code and should I use a Loop of some sort
Thanks Jpre

[Paul Stevens]

I think you need to provide more info to get this answered. Is it a GUI? How is it started? What does it do?

[jp staff]

He is my code in a nutshell, after it goes through everything I want to beable to ask the user if it would like to go through the process again

<font size=2.5>
import javax.swing.JOptionPane;
import java.text.DecimalFormat;
public class CostOfFraming{
 public static void main(String args[]){
 //Declaration of variables
 double wood, back, glass,plen1, phigh1,entry, 
        cwood, cback, cglass, photo;
 String plen,phigh;
 //changes double to decimal
    DecimalFormat twoDigits= new DecimalFormat("###.##");
 
 //gives a message to the viewer
 JOptionPane.showMessageDialog(null,"Press enter to Continue Entering your photo(0.0 to Exit)");
 //takes in the user input for photgraph 
 plen=
 JOptionPane.showInputDialog("\n\nEnter the Length of your photo");     
 phigh=
 JOptionPane.showInputDialog("Enter the Height of your photo");  
    //changes string into a double
    plen1=Double.parseDouble( plen );
    phigh1=Double.parseDouble( phigh );
    //calculations
    wood=2*((6+plen1)+(6+phigh1))/12;
    cwood=wood*(2.50);
    back=((5.5+plen1)*(5.5+phigh1))/144;
    cback=back*(1.5);
    cglass=back*(5.5);
    photo=(cwood)+(cback)+(cglass);
    
    //prints statements to viewer
    System.out.println("Length :" +plen1);
    System.out.println("Height :" +phigh);
    System.out.println("\n\nItemimized Quotation");
    System.out.println("Cost of Wooden Frame :     $"    +twoDigits.format(cwood));
    System.out.println("Cost of Backing Card :     $"    +twoDigits.format(cback));
    System.out.println("Cost of Glass        :     $"    +twoDigits.format(cglass));
    System.out.println("\nTotal Cost           :     $"    +twoDigits.format(photo)); 
    System.out.println("\nDo You Want to Continue with another? (Y/N)");//here is where my problem is
 System.exit(0);
 }
}

[This message has been edited by Cindy Glass (edited September 12, 2001).]

[Dave Vick]

JP
Just put the entire working part of the main in a loop. Here it is in a do loop:

// Loops until quit is entered
do{
    //gives a message to the viewer
    JOptionPane.showMessageDialog(null,"Press enter to Continue Entering your photo(0.0 to Exit)");
    //takes in the user input for photgraph 
    plen=
    JOptionPane.showInputDialog("\n\nEnter the Length of your photo"); 
    phigh=
    JOptionPane.showInputDialog("Enter the Height of your photo"); 
    //changes string into a double
    plen1=Double.parseDouble( plen );
    phigh1=Double.parseDouble( phigh );
    //calculations
    wood=2*((6+plen1)+(6+phigh1))/12;
    cwood=wood*(2.50);
    back=((5.5+plen1)*(5.5+phigh1))/144;
    cback=back*(1.5);
    cglass=back*(5.5);
    photo=(cwood)+(cback)+(cglass);
    //prints statements to viewer
    System.out.println("Length :" +plen1);
    System.out.println("Height :" +phigh);
    System.out.println("\n\nItemimized Quotation");
    System.out.println("Cost of Wooden Frame : $" +twoDigits.format(cwood));
    System.out.println("Cost of Backing Card : $" +twoDigits.format(cback));
    System.out.println("Cost of Glass : $" +twoDigits.format(cglass));
    System.out.println("\nTotal Cost : $" +twoDigits.format(photo));
    doOver = JOptionPane.showConfirmDialog(null, "Do You Want to Continue with another?","Continue?",JOptionPane.YES_NO_OPTION);
}while(doOver == JOptionPane.YES_OPTION);

you'll need to declare the int variable doOver in the code above where the loop starts.
One point though, from a design stand point. You're collecting the information from the user in inputDialogs but then you show the results on the command line. That is a little hard to follow and some users might get confused. It might be better to do it all one way or the other - all on the command line or all with dialog boxes.
hope that helps you out
------------------
Dave
Sun Certified Programmer for the Java� 2 Platform
[This message has been edited by Dave Vick (edited September 10, 2001).]

[jp staff]

Thanks dave that helps me out a lot, I am very new to java, and still think in terms of c, to take input from the command line from the user, How do I do that. My book dosen't go into to much detail. Thanks Jp

[Dave Vick]

JP
Here this should give you good start on it.
declare this before the actual loop:
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
At the bottom of the loop, instead of the dialog use this:

System.out.println("\nDo You Want to Continue with another? (Y/N)");
    try{
        doOver = in.readLine();
        System.out.println("doOver is:" + doOver);
    }
    catch(IOException e){}

If you need more let me know

------------------
Dave
Sun Certified Programmer for the Java� 2 Platform