Radio Button Selected

[MallardsReach]

Below is the code for 12 radiobuttons it compiles and runs but when I test out the first 2 buttons nothing happens. I have setActionCommand in the loop for each button so What is it I've not done?

	ButtonGroup bgTableButtons = new ButtonGroup(); 
				
		JRadioButton\[\] rbTable = new JRadioButton\[13\];
		
			int y = 20;
			for (int i = 1; i < rbTable.length; i++)
				{
					rbTable\[i\] = new JRadioButton(Integer.toString(i) + " Times");
					rbTable\[i\].setActionCommand(Integer.toString(i));
					rbTable\[i\].setBounds(320, y, 80, 20);
					bgTableButtons.add(rbTable\[i\]);
					panel.add(rbTable\[i\]);
					y = y + 20;
				} //End of for loop
       
	if(rbTable\[1\].isSelected())
	{
       userText.setText("Button 1");
    }
    else if(rbTable\[2\].isSelected())
	{
        userText.setText("Button 2");
    } // End of if

[ZurdoDev]

Do you have code for that implements the action command?

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[MallardsReach]

I have the following imports that's all What other code do I need? the examles I've looked just show isSelected and that's all.

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

[ZurdoDev]

Why are you setting setActionCommand to a number?

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[MallardsReach]

Because I tried setting it to the name of the radiobutton but that didn't work either.

rbTable[i].setActionCommand(Integer.toString(i) + " Times");

[ZurdoDev]

Do you know what the command is for?

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[Lost User]

That is not the way to do it I am afraid. Visual components use event handlers which are signalled when the events (e.g. pushing a button) occurs. So you need to use the Button (Java Platform SE 7 ) addActionListener[^] method so your code gets called at the relevant time. I would again strongly suggest you go to The Java™ Tutorials[^] and work through them a few times. Trying to learn a language and framework by posting questions here (or any other forum) will take you much longer to get to where you want.

[MallardsReach]

Thanks Richard I have and do look at the Java Tutorials but don't always find them helpful even though they explain the concepts of components. I did eventually figure it out, the code is below for anyone else to look through,

		ItemListener itemListener = new ItemListener() {
			public void itemStateChanged(ItemEvent itemEvent) {
				AbstractButton aButton = (AbstractButton)itemEvent.getSource();
					int state = itemEvent.getStateChange();
					String name = aButton.getText();
				for (int i = 1; i < rbTable.length; i++)
				{	
					if (state == ItemEvent.SELECTED) {
						if (name.equals(rbTable\[i\].getText())) {
							userText.setText(rbTable\[i\].getText());
						}

					}
				}	
			}  
		};

[Lost User]

MallardsReach wrote:

don't always find them helpful even though they explain the concepts of components.

What about all the sample code that's included? Seriously, you really should persevere with them. They teach things in a structured order and you get all the basic concepts well established before moving on to the more advanced stuff. I used the published version of these years ago when I first started working in Java, and have gone back and repeated the online versions a number of times.

[MallardsReach]

Hi Richard, Can't argue and have no wish to, with the points you make about the sample code, The thing is they are stand alone ie Here's a method, here's how to call it. Here' some radio buttons, here's how to find the one selected. And they work fine the problem is when your project gets more added to it and includes many components and then it's trying to get them to work with each other. I am going to get 'Java: The Complete Reference, Eleventh Edition' as soon as things get back to normal. Until then I have to rely on the tutorials and forums to guide me.

[MallardsReach]

Talk about making things complicated! Here is the final code, no user defined method was needed, I just had to place the results for pressing a button in the 'itemStateChanged method'

		ItemListener itemListener = new ItemListener() {
			public void itemStateChanged(ItemEvent itemEvent) {
				AbstractButton aButton = (AbstractButton)itemEvent.getSource();
					int state = itemEvent.getStateChange();
					String name = aButton.getText();
				for (int i = 1; i < rbTable.length; i++)
				{	
					if (state == ItemEvent.SELECTED) {
						if (name.equals(rbTable\[i\].getText())) {
							displayTable.setText(""); //Clear the displayTable 
							int firstNum, answerNum;
							for (firstNum = 1; firstNum <=12; firstNum ++)
							{
								answerNum = firstNum \* i;
								displayTable.append(" " + firstNum + " x " + i + " = " + answerNum +"\\n");
							}
			
						}
					}
				}
			}  
		};

[Brenda Jasprizza]

thanks for your answer