如何显示包含内容的弹出窗口

Question

我正在尝试制作一个以秒为单位的程序，然后在午夜后弹出时间。为此，我编写了以下代码，尽管我无法让它打印回时间。我可以让它显示在控制台中，但我宁愿它弹出。谁能指出我正确的方向？谢谢

import javax.swing.JOptionPane;

公开课练习4 {

private static final int MinsInHour = 60;
private static final int SecsInMinute = 60;

public static void main(String[] args) {

    String inputseconds = JOptionPane.showInputDialog("How many seconds? <> ");
    int seconds = Integer.parseInt(inputseconds);

}

private static String timeConversion(int seconds) {

    final int MinsInHour = 60;
    final int SecsInMinute = 60;

        int minutes = seconds / SecsInMinute;
        seconds -= minutes * SecsInMinute;

        int hours = minutes / MinsInHour;
        minutes -= hours * MinsInHour;

    return hours + " hours " + minutes + " minutes " + seconds + " seconds";
    JOptionPane.showMessageDialog(hours + " hours " + minutes + " minutes " + seconds + " seconds");
}

}

Answer 1

return 之后不能有其他命令。我已经为你颠倒了最​​后两行。

private static String timeConversion(int seconds) {

    final int MinsInHour = 60;
    final int SecsInMinute = 60;

        int minutes = seconds / SecsInMinute;
        seconds -= minutes * SecsInMinute;

        int hours = minutes / MinsInHour;
        minutes -= hours * MinsInHour;

    JOptionPane.showMessageDialog(hours + " hours " + minutes + " minutes " + seconds + " seconds");
    return hours + " hours " + minutes + " minutes " + seconds + " seconds";
}