JComboBox and Textfield

Hello, I am creating a JComboBox and textfield. When ever the user selects an item from the ComboBox its supposed to show up in the textfield. Right now, if you select one item, it will show up in the textfield, select another item and it take out the previous item and show the new one. I want to make it so that all of the user choices will be in the textfield.

My code so far:

Code :

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import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
public class ComboBox{
	JComboBox combo;
	JTextField txt;
	public static void main(String[] args) {
		ComboBox b = new ComboBox();
	}
 
	public ComboBox(){
		String course[] = {"BCA","MCA","PPC","CIC"};
		JFrame frame = new JFrame("Creating a JComboBox Component");
		JPanel panel = new JPanel();
		combo = new JComboBox(course);
		combo.setBackground(Color.gray);
		combo.setForeground(Color.red);
		txt = new JTextField(10);
		panel.add(combo);
		panel.add(txt);
		frame.add(panel);
		combo.addItemListener(new ItemListener(){
			public void itemStateChanged(ItemEvent ie){
				String str = (String)combo.getSelectedItem();
				txt.setText(str);
			}
		});
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setSize(400,400);
		frame.setVisible(true);
	}
}

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JComboBoxes are usually used to provide for single rather than multiple selections, so when you say "all the users choices" do you mean all the choices that the user has gone through up to that point? If so this would be as simple as
changing

Code :

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txt.setText(str);

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to

Code :

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txt.setText(txt.getText() + " " + str);//space or any other delim

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Should you wish for multiple selections at a time, you may want to use a series of JCheckBoxes (for smaller numbers) or a JTable (for larger numbers)

Copeg Thanks, It does what I want, only problem is it repeats the selection twice instead of once, any ideas why?

Quote:

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Originally Posted by Nexusfactor

Copeg Thanks, It does what I want, only problem is it repeats the selection twice instead of once, any ideas why?

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Item events are triggered for a variety of events, so you should screen them to get the behavior you want.

Code :

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public void itemStateChanged(ItemEvent e){
	if ( e.getStateChange() == ItemEvent.SELECTED ){
		//your code here
	}
}

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