Java:JOptionPane Radio Buttons

Question

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");

Answer 1

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

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");
}

Answer 2

您可以创建自定义面板并显示您喜欢的任何选项,例如:

public class Test {

    public static void main(final String[] args) {
        final JPanel panel = new JPanel();
        final JRadioButton button1 = new JRadioButton("1");
        final JRadioButton button2 = new JRadioButton("2");

        panel.add(button1);
        panel.add(button2);

        JOptionPane.showMessageDialog(null, panel);
    }
}