Programming Forums > Application Development > Java

oNe8 · Feb 21st, 2006, 11:40 PM

getContentPane comes from the JFrame class, so your project will ne to extend JFrame, all the content pane really is a the a master JPanel.

usally you create a container object of the content pane rather then directly adding objects to it.

titaniumdecoy · Feb 22nd, 2006, 12:14 AM

In the code you posted, you could add the elements directly to the window (JFrame) by calling app.getContentPane().add(element), or alternatively add them to the panel (JPanel) by calling pan.add(element). If you choose the former you can remove pan from your code.

ReggaetonKing · Feb 22nd, 2006, 7:11 AM

when you have BorderLayout, you have to set the button as you want by adding another agrument to the parameters of the components!
[PHP]
Panel panel = new Panel();
panel.setLayout(new BorderLayout());
panel.add(new Button("Okay"), BorderLayout.SOUTH);
[/PHP]
Do you see what I mean?
[PHP]
panel.add(new Button("North"), BorderLayout.NORTH);
panel.add(new Button("South"), BorderLayout.SOUTH);
panel.add(new Button("East"), BorderLayout.EAST);
panel.add(new Button("West"), BorderLayout.WEST);
panel.add(new Button("Center"), BorderLayout.CENTER);
[/PHP]

Kilo · Feb 22nd, 2006, 4:26 PM

yes reggeaton i completely understand that concept... that is not my issue... i do not want a HUGE JTextField.. i want to be able to make it the same size as the button next to it which is also HUGE at the moment.

[php]
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JTextField;
import javax.swing.JPanel;

import java.awt.BorderLayout;

public class lettercount extends JFrame
{
public static void main(String args[])
{
JPanel pan=new JPanel(new BorderLayout());
JFrame app=new JFrame("Letter Counter");
JButton fileButton=new JButton("Scan File");
JTextField filePath=new JTextField();

char[] letterArray=new char[26];
int[] letterCount=new int[26];
int count=0;

for(int i=97;i<=122;i++)
{
letterArray[count]=(char)i;
System.out.printf("%d = %s\n",count,letterArray[count]);
count++;
}

//pan.add(BorderLayout.CENTER, filePath);
//pan.add(BorderLayout.EAST, fileButton);

//getContentPane().setLayout(null);

//getContentPane().add(fileButton);
fileButton.setBounds(24,500,72,36); // x, y, width, height
fileButton.setVisible(true);
pan.add(fileButton);

app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
app.add(pan);
app.setSize(450,250);
app.setVisible(true);

}
}
[/php]

code compiles with no errors but does not complete the needed objective... it seems as if these lines below almost do nothing at all!

[php]
fileButton.setBounds(24,500,72,36); // x, y, width, height
fileButton.setVisible(true);
[/php]

Kilo · Feb 22nd, 2006, 7:44 PM

no help for me????

titaniumdecoy · Feb 22nd, 2006, 8:00 PM

Since you have decided to add the button to the JPanel pan, you need to change this line of code:

JPanel pan=new JPanel(new BorderLayout());

to:

JPanel pan = new JPanel();
pan.setLayout(null);

The layout of the container you are adding an element to that you want to position by setBounds(...) must be null.

ReggaetonKing · Feb 22nd, 2006, 8:53 PM

[PHP]
import java.awt.*;
Container panel = getContentPane();
panel.setLayout(new FlowLayout());
[/PHP]
what this layout does is it add the components to the "panel" and arrange em in the order that they are added! Try it out!

oNe8 · Feb 22nd, 2006, 9:01 PM

Or what you can do is use gridLayout that is only a 1x2 grid and when it adds the compents to it, it will make them the same size. Because they will be divded up to share the space.

titaniumdecoy · Feb 23rd, 2006, 2:23 PM

Kilo... you are extending JFrame for no reason, since you are creating a new JFrame separately. Here is an example of how to make use of extending JFrame (I included only the GUI parts of your code):

(Toggle Plain Text)

import javax.swing.*;

public class LetterCount extends JFrame 
{
    public LetterCount() { 
        // If a new LetterCount() is created without a String
        // as an argument, we will call the constructor that
        // takes a String argument with an empty string.
        this(""); 
    }
    
    public LetterCount(String title) {
        // Call the JFrame constructor (this class extends JFrame)
        super(title); 
        // Create fileButton
        JButton fileButton = new JButton("Scan File");
        fileButton.setBounds(20,20,72,20); // x, y, width, height 
        fileButton.setVisible(true);
        // Create filePath
        JTextField filePath = new JTextField();
        filePath.setBounds(120,20,200,20); // x, y, width, height
        filePath.setVisible(true);
        // Add fileButton and filePath to this window's default
        // content pane; getContentPane() is inherited from JFrame,
        // which this class extends
        getContentPane().setLayout(null);
        getContentPane().add(fileButton);
        getContentPane().add(filePath);
        // Set window attributes
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(450,250);
        setVisible(true);
    }
    
    public static void main(String args[]) 
    {
        // Create a new LetterCount object; since LetterCount 
        // extends JFrame this will create a new window
        new LetterCount();
    }
}

Kilo · Feb 23rd, 2006, 3:20 PM

thank you very very much man... im at work but i will attempt this within the next couple hours

Feb 21st, 2006, 11:40 PM	#11
oNe8 Newbie Join Date: Jan 2006 Posts: 17 Rep Power: 0	getContentPane comes from the JFrame class, so your project will ne to extend JFrame, all the content pane really is a the a master JPanel. usally you create a container object of the content pane rather then directly adding objects to it. __________________ http://img523.imageshack.us/img523/8436/user9kz.jpg

Feb 22nd, 2006, 7:11 AM	#13
ReggaetonKing Sexy Programmer Join Date: Nov 2005 Location: New Jersey Posts: 891 Rep Power: 3	when you have BorderLayout, you have to set the button as you want by adding another agrument to the parameters of the components! [PHP] Panel panel = new Panel(); panel.setLayout(new BorderLayout()); panel.add(new Button("Okay"), BorderLayout.SOUTH); [/PHP] Do you see what I mean? [PHP] panel.add(new Button("North"), BorderLayout.NORTH); panel.add(new Button("South"), BorderLayout.SOUTH); panel.add(new Button("East"), BorderLayout.EAST); panel.add(new Button("West"), BorderLayout.WEST); panel.add(new Button("Center"), BorderLayout.CENTER); [/PHP] __________________ I would love to change the world, but they won't give me the source code!

Feb 22nd, 2006, 4:26 PM	#14
Kilo Expert Programmer Join Date: Nov 2005 Location: In Pink Clam? Posts: 542 Rep Power: 0	yes reggeaton i completely understand that concept... that is not my issue... i do not want a HUGE JTextField.. i want to be able to make it the same size as the button next to it which is also HUGE at the moment. [php] import javax.swing.JFrame; import javax.swing.JButton; import javax.swing.JTextField; import javax.swing.JPanel; import java.awt.BorderLayout; public class lettercount extends JFrame { public static void main(String args[]) { JPanel pan=new JPanel(new BorderLayout()); JFrame app=new JFrame("Letter Counter"); JButton fileButton=new JButton("Scan File"); JTextField filePath=new JTextField(); char[] letterArray=new char[26]; int[] letterCount=new int[26]; int count=0; for(int i=97;i<=122;i++) { letterArray[count]=(char)i; System.out.printf("%d = %s\n",count,letterArray[count]); count++; } //pan.add(BorderLayout.CENTER, filePath); //pan.add(BorderLayout.EAST, fileButton); //getContentPane().setLayout(null); //getContentPane().add(fileButton); fileButton.setBounds(24,500,72,36); // x, y, width, height fileButton.setVisible(true); pan.add(fileButton); app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); app.add(pan); app.setSize(450,250); app.setVisible(true); } } [/php] code compiles with no errors but does not complete the needed objective... it seems as if these lines below almost do nothing at all! [php] fileButton.setBounds(24,500,72,36); // x, y, width, height fileButton.setVisible(true); [/php] __________________ "When in Rome, Do as the Romans Do" "Beauty is in the eye of the BEER holder" "Save your breath your going to need it for your blow up doll later" SearchLores.org

Feb 22nd, 2006, 7:44 PM	#15
Kilo Expert Programmer Join Date: Nov 2005 Location: In Pink Clam? Posts: 542 Rep Power: 0	no help for me???? __________________ "When in Rome, Do as the Romans Do" "Beauty is in the eye of the BEER holder" "Save your breath your going to need it for your blow up doll later" SearchLores.org

Feb 22nd, 2006, 8:53 PM	#17
ReggaetonKing Sexy Programmer Join Date: Nov 2005 Location: New Jersey Posts: 891 Rep Power: 3	[PHP] import java.awt.*; Container panel = getContentPane(); panel.setLayout(new FlowLayout()); [/PHP] what this layout does is it add the components to the "panel" and arrange em in the order that they are added! Try it out! __________________ I would love to change the world, but they won't give me the source code!

Feb 22nd, 2006, 12:14 AM	#12
titaniumdecoy Expert Programmer Join Date: Nov 2005 Posts: 837 Rep Power: 3	In the code you posted, you could add the elements directly to the window (JFrame) by calling app.getContentPane().add(element), or alternatively add them to the panel (JPanel) by calling pan.add(element). If you choose the former you can remove pan from your code.

Feb 22nd, 2006, 8:00 PM	#16
titaniumdecoy Expert Programmer Join Date: Nov 2005 Posts: 837 Rep Power: 3	Since you have decided to add the button to the JPanel pan, you need to change this line of code: JPanel pan=new JPanel(new BorderLayout()); to: JPanel pan = new JPanel(); pan.setLayout(null); The layout of the container you are adding an element to that you want to position by setBounds(...) must be null.

Feb 22nd, 2006, 9:01 PM	#18
oNe8 Newbie Join Date: Jan 2006 Posts: 17 Rep Power: 0	Or what you can do is use gridLayout that is only a 1x2 grid and when it adds the compents to it, it will make them the same size. Because they will be divded up to share the space. __________________ http://img523.imageshack.us/img523/8436/user9kz.jpg

Feb 23rd, 2006, 2:23 PM	#19
titaniumdecoy Expert Programmer Join Date: Nov 2005 Posts: 837 Rep Power: 3	Kilo... you are extending JFrame for no reason, since you are creating a new JFrame separately. Here is an example of how to make use of extending JFrame (I included only the GUI parts of your code): (Toggle Plain Text) import javax.swing.; public class LetterCount extends JFrame { public LetterCount() { // If a new LetterCount() is created without a String // as an argument, we will call the constructor that // takes a String argument with an empty string. this(""); } public LetterCount(String title) { // Call the JFrame constructor (this class extends JFrame) super(title); // Create fileButton JButton fileButton = new JButton("Scan File"); fileButton.setBounds(20,20,72,20); // x, y, width, height fileButton.setVisible(true); // Create filePath JTextField filePath = new JTextField(); filePath.setBounds(120,20,200,20); // x, y, width, height filePath.setVisible(true); // Add fileButton and filePath to this window's default // content pane; getContentPane() is inherited from JFrame, // which this class extends getContentPane().setLayout(null); getContentPane().add(fileButton); getContentPane().add(filePath); // Set window attributes setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setSize(450,250); setVisible(true); } public static void main(String args[]) { // Create a new LetterCount object; since LetterCount // extends JFrame this will create a new window new LetterCount(); } } import javax.swing.; public class LetterCount extends JFrame { public LetterCount() { // If a new LetterCount() is created without a String // as an argument, we will call the constructor that // takes a String argument with an empty string. this(""); } public LetterCount(String title) { // Call the JFrame constructor (this class extends JFrame) super(title); // Create fileButton JButton fileButton = new JButton("Scan File"); fileButton.setBounds(20,20,72,20); // x, y, width, height fileButton.setVisible(true); // Create filePath JTextField filePath = new JTextField(); filePath.setBounds(120,20,200,20); // x, y, width, height filePath.setVisible(true); // Add fileButton and filePath to this window's default // content pane; getContentPane() is inherited from JFrame, // which this class extends getContentPane().setLayout(null); getContentPane().add(fileButton); getContentPane().add(filePath); // Set window attributes setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setSize(450,250); setVisible(true); } public static void main(String args[]) { // Create a new LetterCount object; since LetterCount // extends JFrame this will create a new window new LetterCount(); } }

Feb 23rd, 2006, 3:20 PM	#20
Kilo Expert Programmer Join Date: Nov 2005 Location: In Pink Clam? Posts: 542 Rep Power: 0	thank you very very much man... im at work but i will attempt this within the next couple hours __________________ "When in Rome, Do as the Romans Do" "Beauty is in the eye of the BEER holder" "Save your breath your going to need it for your blow up doll later" SearchLores.org

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Programming Forums > Application Development > Java

1st Java Project...Still