单击按钮后如何启用/激活单选按钮？

Question

Using a jFrame in Java and I have a set of radio buttons however I want these radio buttons to be activated once I have selected a certain button. What's the simplest way to do this? Thanks

Answer 1

1. Keep the radio buttons disabled initially.
2. Add an ActionListener to the button.
3. Implement actionPerformed() to enable the radio buttons.

Here is the Oracle tutorial .
Here is the TutorialsPoint tutorial .

Answer 2

This is small example to disable radio buttons.

    JButton button = new JButton("Click");
    JRadioButton one= new JRadioButton("one");
    JRadioButton two= new JRadioButton("two");
    JRadioButton three = new JRadioButton("three");

     one.setEnabled(false);
     two.setEnabled(false);
     three.setEnabled(false);

      //Group the radio buttons.
      ButtonGroup group = new ButtonGroup();
      group.add(one);
      group.add(two);
      group.add(three);

    //Add action listener to button
    button.addActionListener(new ActionListener() {

        public void actionPerformed(ActionEvent e)
        {
     // enable radion buttons.
           one.setEnabled(true);
           two.setEnabled(true);
           three.setEnabled(true);

        }
    });

This is a demo idea how this thing working. This is just a basic demo. Button and radio buttons generated. And when click button you can enable them.

01. Generate button and three radio buttons to jframe.
02. Generate button-group and add those radio buttons.
03. In buttons action listener add that " enable radio button " code.

This link will be really helpful to you. Take a good look at that.
You tube link