What is a JRadioButton?
The JRadioButton class is used to create a radio button. It is used to choose one option from multiple options. It is widely used in exam systems or quiz. It should be added in ButtonGroup to select one radio button only.
How do I get the value of JRadioButton?
When we click on the radio button, the actionPerformed() method is called. Use ButtonGroup. getSelection(). getActionCommand() to get the value selected by the user.
What is the purpose of JRadioButton class?
Class JRadioButton. An implementation of a radio button — an item that can be selected or deselected, and which displays its state to the user. Used with a ButtonGroup object to create a group of buttons in which only one button at a time can be selected.
What is the use of JCheckBox and JRadioButton?
Both JRadioButton and JCheckBox components can extend JToggleButton class, the main difference is that JRadioButton is a group of buttons in which only one button can be selected at a time whereas JCheckBox is a group of checkboxes in which multiple items can be selected at a time.
Which method is called when a JRadioButton is selected?
Use the isSelected() method. It will tell you the state of your radioButton.
How do you create a radio button in Java?
Steps to Group the radio buttons together.
- Create a ButtonGroup instance by using “ButtonGroup()” Method. ButtonGroup G = new ButtonGroup()
- Now add buttons in a Group “G”, with the help of “add()” Method. Example: G. add(Button1); G. add(Button2);
Is selected in Java?
To check if a box is selected, use the isSelected() method. The JCheckBox and the JRadioButton are subclasses of JToggleButton. A toggle button is a two-state button which operates like a light switch, on or off.
How do I disable JRadioButton?
We are using the following APIs. JRadioButton − To create a standard Radio Button. JRadioButton. setEnabled(false); − To disable a Radio Button.
Which method is used to enable the JRadioButton?
Methods Used : ButtonGroup() : Use to create a group, in which we can add JRadioButton.
Which are the classes of Swing API hierarchy?
- javax.swing. AbstractAction (implements javax.swing.Action, java.lang.Cloneable, java.io.Serializable)
How do I get radio button text?
To get the selected radio button, we have used radioGroup. getCheckedRadioButtonId() method, which returns the id of the selected radio button. Then to get the text of the selected radio button, we have used getText() method on that selected radio button.
What is the difference between JButton and JRadioButton?
JRadioButton() : Creates a unselected RadioButton with no text. JButton(String s) : Creates a JButton with a specific text. JLabel(String s) : Creates a JLabel with a specific text.