-----------------------------------

Krocker

Thu Jan 05, 2012 12:08 pm


Calling Methods From Different CLasses?

-----------------------------------

hiya guys, ok so im creating this program that deletes certain files. I have 2 classes, the main program and dProcess (handles the  deleting part). However, i keep getting this error when i am calling DProcess in the main program:

No application overload for the method named "main" was found in type "kcleaner.dProcess". Perhaps you wanted overload version "void main (java.lang.StringMain

dProcess
[code]

package kcleaner;

import java.awt.event.*;
import javax.swing.*;
import java.io.*;

public class dProcess
{
    public static void main (String[] arg) throws Exception
    {
     String drive = JOptionPane.showInputDialog(null, "Please Enter Your Main Hard Drive Letter", "Hardrive", JOptionPane.QUESTION_MESSAGE );
     // String user = JOptionPane.showInputDialog(null, "Please Enter The User Accout Name", "User Account", JOptionPane.QUESTION_MESSAGE );
     
     String folder = drive.toUpperCase()+":\\Nexon/Combat Arms/BlackCipher";
      
     
     boolean file = directory (new File (folder));
        
        if (file == false)
        {
            JOptionPane.showMessageDialog (null, "Directory does not exist.");
        }
        else
        {
        }

    }


    public static boolean directory (File dir)
    {

        if (dir.isDirectory ())
        {
            String[] children = dir.list ();
            for (int i = 0 ; i < children.length ; i++)
            {
                boolean success = directory (new File (dir, children [i]));
                if (!success)
                {
                    return false;
                }
            }
        }
        return dir.delete ();

    }
}
[/code]


-----------------------------------

Tony

Thu Jan 05, 2012 12:23 pm


RE:Calling Methods From Different CLasses?

-----------------------------------

looks like the method is expecting some arguments and you are not giving it any.


-----------------------------------

Krocker

Thu Jan 05, 2012 3:04 pm


Re: RE:Calling Methods From Different CLasses?

-----------------------------------

looks like the method is expecting some arguments and you are not giving it any.

ok... but im not sure what im supposed to argue and how.


-----------------------------------

Tony

Thu Jan 05, 2012 3:24 pm


RE:Calling Methods From Different CLasses?

-----------------------------------


public static void main (String) throws Exception 

an array of String


-----------------------------------

Krocker

Thu Jan 05, 2012 6:14 pm


Re: RE:Calling Methods From Different CLasses?

-----------------------------------


public static void main (String) throws Exception 

an array of String

so i would do 

public static void main (String) throws Exception 
{
Method.main()
}


-----------------------------------

Tony

Thu Jan 05, 2012 6:21 pm


RE:Calling Methods From Different CLasses?

-----------------------------------

I don't know. What kind of arguments (if any?) does Method.main() expect?


-----------------------------------

Krocker

Thu Jan 05, 2012 7:37 pm


Re: RE:Calling Methods From Different CLasses?

-----------------------------------

I don't know. What kind of arguments (if any?) does Method.main() expect?

oh.... im new here so ya... heres the coding for that:

[code]

package kcleaner;


import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.awt.*;

public class Test extends JFrame implements ActionListener
{
    public JFrame f1 = new JFrame ("KCleaner");
    public JPanel p1 = new JPanel ();
    public JButton b1 = new JButton ("Clean");
    public JButton b2 = new JButton ("Close");
    public Test ()


    {
        Image im = Toolkit.getDefaultToolkit ().getImage ("kcleaner/Icon.gif");
        f1.setIconImage (im);
        b1.addActionListener (this);
        b2.addActionListener (this);
        f1.setContentPane (p1);
        f1.setSize (400, 400);
        p1.add (b1);
        p1.add (b2);
        f1.setVisible (true);


    }


    public void actionPerformed (ActionEvent e)
    {
        dProcess method = new dProcess ();
        if (e.getSource () == b1)
        {


            JOptionPane.showMessageDialog (null, "KCleaner is Done!");
            method.directory (File );


        }
        else if (e.getSource () == b2)
        {
            JOptionPane.showMessageDialog (null, "Thank You For Using KCleaner");
            f1.setVisible (false);
        }
    }


    public static void main (String[] args)
    {
        new Test ();
    }
}
[/code]


-----------------------------------

Tony

Thu Jan 05, 2012 7:40 pm


RE:Calling Methods From Different CLasses?

-----------------------------------

I was hoping you could figure out the answer to that question on your own.


-----------------------------------

Krocker

Thu Jan 05, 2012 7:42 pm


Re: Calling Methods From Different CLasses?

-----------------------------------

srry wrong codes, heres the right one

[code]package kcleaner;

import java.awt.event.*;
import javax.swing.*;
import java.io.*;

public class dProcess
{
    public static void main (String[] arg) throws Exception
    {
     String drive = JOptionPane.showInputDialog(null, "Please Enter Your Main Hard Drive Letter", "Hardrive", JOptionPane.QUESTION_MESSAGE );
     // String user = JOptionPane.showInputDialog(null, "Please Enter The User Accout Name", "User Account", JOptionPane.QUESTION_MESSAGE );
     
     String folder = drive.toUpperCase()+":\\Nexon/Combat Arms/BlackCipher";
      
     
     boolean file = directory (new File (folder));
        
        if (file == false)
        {
            JOptionPane.showMessageDialog (null, "Directory does not exist.");
        }
        else
        {
        }

    }


    public static boolean directory (File dir)
    {

        if (dir.isDirectory ())
        {
            String[] children = dir.list ();
            for (int i = 0 ; i < children.length ; i++)
            {
                boolean success = directory (new File (dir, children [i]));
                if (!success)
                {
                    return false;
                }
            }
        }
        return dir.delete ();

    }
}
[/code]


-----------------------------------

Krocker

Thu Jan 05, 2012 7:43 pm


Re: RE:Calling Methods From Different CLasses?

-----------------------------------

I was hoping you could figure out the answer to that question on your own.

i have tried, it has been 1 month of research and such, but nothing has come up. Im frustrated!


-----------------------------------

Tony

Thu Jan 05, 2012 8:01 pm


RE:Calling Methods From Different CLasses?

-----------------------------------

lets step back to the basics then.

- functions -- http://en.wikipedia.org/wiki/Subroutine
- functions with parameters -- http://en.wikipedia.org/wiki/Parameter_(computer_programming)

the example given in those pages is
[code]
double sales_tax(double price)
{
    return 0.05 * price;
}
[/code]
which can be invoked as
[code]
sales_tax(10.00);
[/code]
which will take 10.00, assign it to "price", and compute the result of 0.5. This makes sense so far, but we could also throw other random values at the function
[code]
sales_tax("derp");
sales_tax();
[/code]
What does it mean to take 5% of a word or of nothing? I don't know. I actually don't care. The function specifies the type and number of parameters (in this case, just one double), and so the compiler will make sure that when you ask for a function to receive some values, that you don't forget to give those specific types of values later on.