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From: Lew on 2 May 2010 23:51
jason wrote:
> i [sic] am using the java [sic] desktop application developer in NetBeans.
>
> When I use the following program:
>
> [CODE]
> /*
> * To change this template, choose Tools | Templates
> * and open the template in the editor.
> */
>
> package readtextfileexample;
>
> /**
> *
> * @author amandaabdou
> */
> import java.io.BufferedReader;
> import java.io.File;
> import java.io.FileReader;
> import java.io.FileNotFoundException;
> import java.io.IOException;
>
>
> public class Main {
>
> /**
> * @param args the command line arguments
> */
> public static void main(String[] args) {
> String A;
> A=FileReader("/Users/"+System.getProperty("user.name")+"/

You should follow the naming conventions.

> Desktop/ad_log.txt");
> System.out.println(A);
> }
>
> public static String FileReader(String args){
> File file = new File(args);
> StringBuffer contents = new StringBuffer();
> BufferedReader reader = null;
> String For_Output="";
> try
> {
> reader = new BufferedReader(new FileReader(file));
> String text = null;
>
> // repeat until all lines is read
> while ((text = reader.readLine()) != null)
> {
> contents.append(text)
> .append(System.getProperty(
> "line.separator"));
> For_Output+=text;
> }
> } catch (FileNotFoundException e)
> {
> e.printStackTrace();
> } catch (IOException e)
> {
> e.printStackTrace();
> } finally
> {
> try
> {
> if (reader != null)
> {
> reader.close();
> }
> } catch (IOException e)
> {
> e.printStackTrace();
> }
> }
>
> // show file contents here
>
> return For_Output;
> }
>
> }
> [/CODE]
>
> in a java [sic] application in netbeans [sic], it runs perfectly and does exactly
> what i [sic] want.

Case matters in Java. It's good practice to use correct case in writing about
Java matters.

> if i [sic] attempt to migrate the method of FileReader to my basic desktop
> application it no longer works.
> this desktop application is using the exact same library imports and
> is using identical code aside from one aspect. my FileReader method is
> now called:
> [CODE]
> private String FileReader(String args)
> [/CODE]

And that didn't give you a compiler error?

There is a significant difference between static and instance methods. But
since we don't get the whole picture, we can't tell exactly why you didn't get
a compiler error when the method changed from static to instance.

Either way, the method name should be spelled with an initial lower-case
letter, as with variables.
<http://java.sun.com/docs/codeconv/index.html>

I also suspect that markspace is onto something with hi comments about the
"java [sic] desktop application developer".


--
Lew
From: jason on 4 May 2010 12:22
On May 2, 10:06 pm, markspace <nos...(a)nowhere.com> wrote:
> jason wrote:
> > if i attempt to migrate the method of FileReader to my basic desktop
> > application it no longer works.
>
> Well, I can't tell you what the problem is with the program, if you
> don't show it to me.  All I can say is I agree the program you posted
> works.  The program you didn't post ... shrug, I don't know.
>
> > this desktop application
>
> Ugh, you meant the NetBeans project type "Java Desktop Application?"
>
> Don't use that, I don't think that JSR ever really went anywhere.  It's
> being maintained by one guy at Kenai now who seems to have no resources
> or customers.  Notice that their front page basically refers you to the
> NetBeans Platform (different than the IDE) for an application framework.
>
> https://appframework.dev.java.net/
>
> Use the regular old "Java Application" instead, and just make regular
> old Swing objects.  It works fine, everybody does it.  JSR 296 is, imo,
> dead.

markspace,

thank you very much for taking the time to respond and decipher my
errors.
i was using the "Java Desktop App" for ease of introducing myself to
Java GUI's. it helped and now i am taking your recommended path.

i am having one minor issue. i cannot seem to locate components where
i would like. i have made the components yet cannot place them where i
would like. if you could assist me with this one last issue i will be
on my way to completing my goal.

my current code is below.

a snippet that more aptly explains my issue is the following:
[code] JLabel JLabel1 = new JLabel("Search: ");
//JLabel1.setHorizontalAlignment(SwingConstants.LEFT);
//JLabel1.setVerticalAlignment(SwingConstants.TOP);
JLabel1.setLocation(100, 100);

[/code]

as you can notice, i am trying to use JLabel1.setLocation to denote
the desired location of my label. this does not seem to be working.

thank you in advance for any help!


[code]
//file: PopUpColorMenu.java
import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class PopUpColorMenu extends JFrame
implements ActionListener {
JPopupMenu colorMenu;
Component selectedComponent;

public PopUpColorMenu( ) {
super("v1.0");
setSize(500, 200);
setLocation(200, 200);
addWindowListener(new WindowAdapter( ) {
public void windowClosing(WindowEvent e) { System.exit(0); }
});

MouseListener mouseListener = new MouseAdapter( ) {
public void mousePressed(MouseEvent e) { checkPopup(e); }
public void mouseClicked(MouseEvent e) { checkPopup(e); }
public void mouseReleased(MouseEvent e) { checkPopup(e); }
private void checkPopup(MouseEvent e) {
if (e.isPopupTrigger( )) {
selectedComponent = e.getComponent( );
colorMenu.show(e.getComponent(), e.getX(), e.getY( ));
}
}
};

final Container content = getContentPane( );
JMenuBar menuBar = new JMenuBar( ); //create menu bar

JMenu File_Menu = new JMenu("File"); //create main menu item
File_Menu .setMnemonic(KeyEvent.VK_F);

JMenuItem Def_Save=new JMenuItem("Save As Default");
Def_Save.setMnemonic(KeyEvent.VK_S);

Def_Save.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent arg0){
System.out.println("SAVED");
}
});

JMenuItem Def_Restore=new JMenuItem("Restore Default");
Def_Restore.setMnemonic(KeyEvent.VK_R);

Def_Restore.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent arg0){
System.out.println("RESTORE");
}
});

JMenuItem File_Exit=new JMenuItem("Exit");
File_Exit.setMnemonic(KeyEvent.VK_X);

File_Exit.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent arg0){
//System.out.println("EXITED");
System.exit(0);
}
});

File_Menu.add(Def_Save); //add as submenu
File_Menu.add(Def_Restore);
File_Menu.add(File_Exit);







content.setLayout(new FlowLayout( ));

//menuBar.add(File_Menu);
//setJMenuBar(menuBar);

JLabel JLabel1 = new JLabel("Search: ");
//JLabel1.setHorizontalAlignment(SwingConstants.LEFT);
//JLabel1.setVerticalAlignment(SwingConstants.TOP);
JLabel1.setLocation(100, 100);
content.add(JLabel1);
JButton button1 = new JButton("Go");
button1.addMouseListener(mouseListener);
button1.setHorizontalAlignment(SwingConstants.RIGHT);
button1.setVerticalAlignment(SwingConstants.BOTTOM);
content.add(button1);



colorMenu = new JPopupMenu("Color");
colorMenu.add(("Red"));
colorMenu.add(("Green"));
colorMenu.add(("Blue"));

button1.addActionListener(new ActionListener( ) {

public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
System.out.println("Maybe");
}

});

getContentPane( ).addMouseListener(mouseListener);

setVisible(true);
}

public void actionPerformed(ActionEvent e) {
String color = e.getActionCommand( );
if (color.equals("Red"))
selectedComponent.setBackground(Color.red);
else if (color.equals("Green"))
selectedComponent.setBackground(Color.green);
else if (color.equals("Blue"))
selectedComponent.setBackground(Color.blue);
}

private JMenuItem makeMenuItem(String label) {
JMenuItem item = new JMenuItem(label);
item.addActionListener( this );
return item;
}

public static void main(String[] args) {
new PopUpColorMenu( );
}
}
[/code]
From: markspace on 4 May 2010 12:51
I'll decipher your code in a bit. I like how you're trying to post
complete examples now. That's good! But first I'll show you the easy
way to do it.

jason wrote:
> as you can notice, i am trying to use JLabel1.setLocation to denote
> the desired location of my label. this does not seem to be working.

"There's an app for that."

Check out the GUI builder in NetBeans:

<http://netbeans.org/kb/trails/matisse.html>
From: jason on 4 May 2010 13:19
On May 4, 12:51 pm, markspace <nos...(a)nowhere.com> wrote:
> I'll decipher your code in a bit.  I like how you're trying to post
> complete examples now.  That's good!  But first I'll show you the easy
> way to do it.
>
> jason wrote:
> > as you can notice, i am trying to use JLabel1.setLocation to denote
> > the desired location of my label. this does not seem to be working.
>
> "There's an app for that."
>
> Check out the GUI builder in NetBeans:
>
> <http://netbeans.org/kb/trails/matisse.html>

haha

thanks for humoring me. due to the fact that i have now committed to
building the GUI the good old fashioned way i am going to try my best
to steer clear of GUI's for GUI's etc.

my basic question is this:

how do i create a blank GUI layout, and place items as I want.

ie:

JButton MyButton=new JButton;
MyButton.size(10,10);
MyButton.setLocation(0,0);
JLabel MyLabel=new JLabel;
JLabel.size(2,10);
From: markspace on 4 May 2010 14:28
jason wrote:
> haha
>
> thanks for humoring me. due to the fact that i have now committed to


I'm not humoring you or answering lightly. I'm dead serious. The only
way to be productive and produce robust, multi-platform GUIs is to use a
builder tool. Trying to do this by hand is basically a fool's errand.
You'll just end up re-inventing the wheel. Put some effort into
learning how to make the builder tool do what you want, the long term
rewards are worth it.


> building the GUI the good old fashioned way i am going to try my best
> to steer clear of GUI's for GUI's etc.


Learning is OK, just don't loose sight of the overall goal: producing
code efficiently. Start with the Java tutorials. You'll need to
understand LayoutManagers to lay out by hand. There's lots of good
examples of how to layout components manually here:

<http://java.sun.com/docs/books/tutorial/uiswing/layout/using.html>

You should also look up "Separation of Concerns" before rolling too many
of your own GUI components. Using a GUI builder will help keep you
honest there.


> MyButton.setLocation(0,0);


Use "setBounds" to position a component manually. You will need to
remove the layout manager first, because a layout manager will call
setBounds itself to reposition its components. See this example here:

<http://java.sun.com/docs/books/tutorial/uiswing/layout/none.html>
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