Java:JOptionPane 单选按钮

Question

我正在开发一个简单的程序来帮助我计算混合 eLiquid 的 Material 。我正在尝试在 JOptionPane.showInputDialog 中添加单选按钮，但我无法将它们链接在一起。当我运行该程序时，什么也没有出现。这就是我的全部:

JRadioButton nicSelect = new JRadioButton("What is the target Nicotine level? ");
        JRadioButton b1 = new JRadioButton("0");
        JRadioButton b2 = new JRadioButton("3");
        JRadioButton b3 = new JRadioButton("6");
        JRadioButton b4 = new JRadioButton("12");
        JRadioButton b5 = new JRadioButton("18");
        JRadioButton b6 = new JRadioButton("24");

Answer 1

作为使用多个 JRadioButton 的替代方法，您可以通过将字符串数组传递给 JOptionPane.showInputDialog，通过 JComboBox 提供选择界面:

String[] values = {"0", "3", "6", "12", "18", "24"};

Object selected = JOptionPane.showInputDialog(null, "What is the target Nicotine level?", "Selection", JOptionPane.DEFAULT_OPTION, null, values, "0");
if ( selected != null ){//null if the user cancels. 
    String selectedString = selected.toString();
    //do something
}else{
    System.out.println("User cancelled");
}