Which JRadioButton is selected
I have several JRadioButtons in a ButtonGroup.
private ButtonGroup radioGroup= new ButtonGroup();
private JRadioButton radio1= new JRadioButton("Red");
private JRadioButton radio2= new JRadioButton("Green");
private JRadioButton radio3= new JRadioButton("Blue");
radioGroup.add(radio1);
radioGroup.add(radio2);
radioGroup.add(radio3);
How can I check which one has been selected?
With System.out.println(radioGroup.getSelection())
I only get something like javax.swing.JToggleButton$ToggleButtonModel@32b3714
.
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From the selected ButtonModel you can get the actionCommand String (if you didn't forget to set it!).
// code not compiled, run, nor tested in any way
ButtonModel model = radioGroup.getSelection();
String actionCommand = (model == null) ? "" : model.getActionCommand():
System.out.println(actionCommand);
But this will only work if you set the actionCommand first .. For example,
// code not compiled, run, nor tested in any way
String[] colors = {"Red", "Green", "Blue"};
JRadioButton[] radioBtns = new JRadioButton[colors.length];
for (int i = 0; i < radioBtns.length; i++) {
radioBtns[i] = new JRadioButton(colors[i]);
radioBtns[i].setActionCommand(colors[i]);
radioGroup.add(radioBtns[i]);
somePanel.add(radioBtns[i]);
}
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What you see is the toString
default implementation of the method . And ButtonGroup#getSelection
will return the ButtonModel
selected one JRadioButton
.
See also How to get which JRadioButton is selected from the ButtonGroup .
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If listeners are connected, an easy way to identify the source is to invoke ActionEvent.getSource()
.
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This will return the text of the selected radiobutt from the buttongroup
Enumeration<AbstractButton> allRadioButton=radioGroup.getElements();
while(allRadioButton.hasMoreElements())
{
JRadioButton temp=(JRadioButton)allRadioButton.nextElement();
if(temp.isSelected())
{
JOptionPane.showMessageDialog(null,"You select : "+temp.getText());
}
}
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