Java，JOptionPane 无法应用于给定类型

Question

当我运行“JOptionPane.showOptionDialog”命令时，出现此错误。我已按照 Oracle 教程页面上的步骤进行操作，但这个步骤就是无法执行。如果需要的话我可以添加我的导入，但是列表很长。

Picture of the error i get

Object[] options = {"Ja", "Nej"}; //the values i want my buttons to have
    int test = JOptionPane.showOptionDialog(null, //should make the panel, BlueJ marks showOptionDialog as the problem
        spm, //this is a variable i define earlier in the code. Won't be a problem
        "TestTwo", //the name of the window
        JOptionPane.YES_NO_OPTION, //To be honest, idk what this do
        null, //To be honest, idk what this do
        options, //implements the values from the top
        options[0]); //Don't really know this one either

Answer 1

您缺少参数MessageType。

这些是选项 Pane 所需的参数:

JOptionPane.showOptionDialog(parentComponent、消息、标题、optionType、messageType、图标、选项、initialValue)

Object[] options = {"Ja", "Nej"};
    int test = JOptionPane.showOptionDialog(null,
        spm,
        "TestTwo", //the name of the window
        JOptionPane.YES_NO_OPTION, //Type of options, those two buttons at bottom of box
        JOptionPane.PLAIN_MESSAGE, //The JOptionPane type
        null, //Icon to be applied to dialog
        options, //implements the values from the top
        options[0]); //The default selected component when dialog opens