我正在研究一个简单的程序来帮助我计算混合eLiquid的东西.我试图在JOptionPane.showInputDialog中添加单选按钮,但我无法将它们链接在一起.当我运行程序时,什么都没有出现.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");

解决方法:

作为使用多个JRadioButton的替代方法,您可以通过将String数组传递给JOptionPane.showInputDialog,通过JComboBox提供选择接口：

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");
}