Thread: Radio button .. display empty screen ?? plz Help

package FunGUI;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextArea;

public class RadioButton extends JFrame
{

// declare radio buttons.
private JRadioButton jrbRed, jrbGreen, jrbBlue, jrbWhite;
JTextArea txaList;

public static void main (String []args)
{

RadioButton gui = new RadioButton();
gui.setSize(500,250);
gui.setVisible(true);
gui.setTitle("Radio Button");
gui.setLocationRelativeTo(null);
gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE) ;

}

public RadioButton ()
{

txaList = new JTextArea(10,20);

// final JPanel pnlTshirt =
// new JPanel ( new BorderLayout(100, 200));
// add(pnlTshirt, BorderLayout.CENTER);


JPanel pnlRadioButtons = new JPanel ();
pnlRadioButtons.setLayout(new GridLayout (4, 1));
pnlRadioButtons.add(jrbRed = new JRadioButton ("Red"));
pnlRadioButtons.add(jrbGreen = new JRadioButton ("Green"));
pnlRadioButtons.add(jrbBlue = new JRadioButton ("Blue"));
pnlRadioButtons.add(jrbWhite= new JRadioButton ("White"));

// Create a radio button group to group 4 buttons.
ButtonGroup group = new ButtonGroup ();
group.add(jrbRed);
group.add(jrbGreen);
group.add(jrbBlue);
group.add(jrbWhite);

// JPanel pnlNorth = new JPanel (new FlowLayout());
// pnlNorth.add(group);

// Set keyboard mnemonics.
jrbRed.setMnemonic('R');
jrbGreen.setMnemonic('G');
jrbBlue.setMnemonic('B');
jrbWhite.setMnemonic('W');

//Register listeners for radio button.
jrbRed.addActionListener(new ActionListener()
{
public void actionPerformed (ActionEvent ae)
{
txaList.setForeground(Color.red);
}
});

jrbGreen.addActionListener(new ActionListener()
{
public void actionPerformed (ActionEvent ae)
{
txaList.setForeground(Color.green);
}
});

jrbBlue.addActionListener(new ActionListener()
{
public void actionPerformed (ActionEvent ae)
{
txaList.setForeground(Color.blue);
}
});

jrbWhite.addActionListener(new ActionListener()
{
public void actionPerformed (ActionEvent ae)
{
txaList.setForeground(Color.white);
}
});

// Set initial message color to blue.
jrbWhite.setSelected(true);
txaList.setForeground(Color.white);

}


}

>

I was trying to show the button to start handling them .. but nothing show on GUI when its run ??

I added the panel but is there anything that I could do to fix the problem .. Also, I use to have JPanel instate of JTextArea but I changed it to try another staff ..

Thanks

package FunGUI;
 
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextArea;
 
public class RadioButton extends JFrame
{
 
	// declare radio buttons.
	private JRadioButton jrbRed, jrbGreen, jrbBlue, jrbWhite;
	JTextArea txaList;
 
	public static void main (String []args)
	{
 
		RadioButton gui = new RadioButton();
		gui.setSize(500,250);
		gui.setVisible(true);
		gui.setTitle("Radio Button");
		gui.setLocationRelativeTo(null);
		gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
	}
 
	public RadioButton ()
	{
 
		txaList = new JTextArea(10,20);
 
//		 final JPanel pnlTshirt =
//			new JPanel ( new BorderLayout(100, 200));
//		add(pnlTshirt, BorderLayout.CENTER);
 
 
		JPanel pnlRadioButtons = new JPanel ();
		pnlRadioButtons.setLayout(new GridLayout (4, 1));
		pnlRadioButtons.add(jrbRed = new JRadioButton ("Red"));
		pnlRadioButtons.add(jrbGreen = new JRadioButton ("Green"));
		pnlRadioButtons.add(jrbBlue = new JRadioButton ("Blue"));
		pnlRadioButtons.add(jrbWhite= new JRadioButton ("White"));
 
		// Create a radio button group to group 4 buttons.
		ButtonGroup group = new ButtonGroup ();
		group.add(jrbRed);
		group.add(jrbGreen);
		group.add(jrbBlue);
		group.add(jrbWhite);
 
//		JPanel pnlNorth = new JPanel (new FlowLayout());
//		pnlNorth.add(group);
 
		// Set keyboard mnemonics.
		jrbRed.setMnemonic('R');
		jrbGreen.setMnemonic('G');
		jrbBlue.setMnemonic('B');
		jrbWhite.setMnemonic('W');
 
		//Register listeners for radio button.
		jrbRed.addActionListener(new ActionListener()
		{
			public void actionPerformed (ActionEvent ae)
			{
				txaList.setForeground(Color.red);
			}
		});
 
		jrbGreen.addActionListener(new ActionListener()
		{
			public void actionPerformed (ActionEvent ae)
			{
				txaList.setForeground(Color.green);
			}
		});
 
		jrbBlue.addActionListener(new ActionListener()
		{
			public void actionPerformed (ActionEvent ae)
			{
				txaList.setForeground(Color.blue);
			}
		});
 
		jrbWhite.addActionListener(new ActionListener()
		{
			public void actionPerformed (ActionEvent ae)
			{
				txaList.setForeground(Color.white);
			}
		});
 
		// Set initial message color to blue.
		jrbWhite.setSelected(true);
		txaList.setForeground(Color.white);
 
	}
 
 
}

Originally Posted by Norm

Where do you add any components to the JFrame so they can be seen?

Thanks man .. i have been thinking too much and I missed this code of line

		add(pnlRadioButtons, BorderLayout.NORTH);

Any recommendation for my program ..
I am designing a small program for ( T-shirtCompany ) will let the user choose his own style ( out of 3 styles ) colors ( 6 colors ) and size ( all sizes )

should I design pics and let the user choose the design by ( drop down list ) ? after that choose the color using the same function? each time the user choose one item from the drop list the program will call another pic and show it ?? < in this case I will have around 18 pics
is this a good idea to start or is there any thing else easier and better?

thank you guys so much