e768. creating a jradiobutton component.txt

来自「这里面包含了一百多个JAVA源文件」· 文本 代码 · 共 28 行

// Create an action for each radio button
    Action action1 = new AbstractAction("RadioButton Label1") {
        // This method is called whenever the radio button is pressed,
        // even if it is already selected; this method is not called
        // if the radio button was selected programmatically
        public void actionPerformed(ActionEvent evt) {
            // Perform action
        }
    };
    Action action2 = new AbstractAction("RadioButton Label2") {
        // See above
        public void actionPerformed(ActionEvent evt) {
            // Perform action
        }
    };
    
    // Create the radio buttons using the actions
    JRadioButton b1 = new JRadioButton(action1);
    JRadioButton b2 = new JRadioButton(action2);
    
    // Associate the two buttons with a button group
    ButtonGroup group = new ButtonGroup();
    group.add(b1);
    group.add(b2);
    
    // Neither radio button is selected; to select a radio button,
    // see e769 Selecting a JRadioButton Component in a Button Group