Question

我和我的四人团队正在开发一个名为“Chemistry Escape Room”的高级Java面向对象编程课程中的游戏。我们的程序包含在JToolBar中收集的项目，这些项目通过Toolbar.java类保存每个类的项目。我们使用Items.java中设置为false的布尔值，然后一旦点击JButton，布尔值设置为true，然后传递给Toolbar.java类，其中所有项都存储在JToolbar中。

问题是，一旦项目设置为true，它们似乎不会保持真实。我设置if语句来检测布尔值是否为假，然后项目/按钮将显示在JToolBar中。

Items.java：

public class Items extends JFrame { 
Toolbar toolbar = new Toolbar();
static boolean flaskpickup = false;
static boolean jugpickup = false;
static boolean bookpickup = false;
static boolean gflaskpickup = false;
static boolean paperpickup = false;
static boolean keypickup = false;
static int test;

public static Component btnFlask()
{


    JButton btnFlask = new JButton();
    btnFlask.setIcon(new ImageIcon(ChemistryTeachersDesk.class.getResource("/Images/flask_blue.png")));
    btnFlask.setBounds(607, 351, 141, 103);
    btnFlask.setOpaque(false);
    btnFlask.setContentAreaFilled(false);
    btnFlask.setBorderPainted(false);


    btnFlask.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            btnFlask.setVisible(false);
            JOptionPane.showMessageDialog(new JPanel(),
                    "It's a Flask of Hyrdrogen, still cold and liquified. Maybe you can combine this with something.",
                    "Flask of Hydrogen",
                    JOptionPane.INFORMATION_MESSAGE);
            flaskpickup = true;
            test = 1;
        }
    });

    //Toolbar.bar();
    return btnFlask;
}

public static Component btnJug()
{
    JButton btnJug = new JButton();
    btnJug.setIcon(new ImageIcon(ChemistryDoor.class.getResource("/Images/waterjug1.png")));
    btnJug.setBounds(219, 409, 85, 87);
    btnJug.setOpaque(false);
    btnJug.setContentAreaFilled(false);
    btnJug.setBorderPainted(false);


    btnJug.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {
            btnJug.setVisible(false);
            JOptionPane.showMessageDialog(new JPanel(),
                    "This water is cold and fresh, maybe you should add it to something.",
                    "Jug of Water",
                    JOptionPane.INFORMATION_MESSAGE);
            jugpickup = true;
        }
    });

    return btnJug;
}

public static Component btnBook() {
    JButton btnBook = new JButton();
    btnBook.setIcon(new ImageIcon(ChemistryRoom.class.getResource("/Images/textbook.png")));
    //btnBook.setOpaque(false);
    btnBook.setContentAreaFilled(false);
    btnBook.setBorderPainted(false);
    btnBook.setBounds(505, 258, 87, 65);

    btnBook.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            btnBook.setVisible(false);
            JOptionPane.showMessageDialog(new JPanel(),
                    "By the cover, it seems this is a textbook for chemistry. Maybe it contains the answers to getting out of this room.",
                    "Chemistry Textbook",
                    JOptionPane.INFORMATION_MESSAGE);
            bookpickup = true;
        }
    });


    return btnBook;
}

public static Component btnGreenFlask() {
    JButton btngFlask = new JButton();
    btngFlask.setContentAreaFilled(false);
    btngFlask.setBorderPainted(false);
    btngFlask.setIcon(new ImageIcon(ChemistryRoom.class.getResource("/Images/flask.png")));
    btngFlask.setBounds(265, 265, 58, 58);

    btngFlask.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {
            btngFlask.setVisible(false);
            //btnToolFlask.setVisible(true);
            gflaskpickup = true;
        }
    });

    return btngFlask;

}

public static Component Paper() {
    JButton btnPaper = new JButton();
    btnPaper.setContentAreaFilled(false);
    btnPaper.setBorderPainted(false);
    btnPaper.setIcon(new ImageIcon(ChemistryDoor.class.getResource("/Images/paper1.png")));
    btnPaper.setBounds(513, 465, 99, 50);

    btnPaper.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {
            btnPaper.setVisible(false);
            JOptionPane.showMessageDialog(new JFrame(), "This slip of paper says that to mix chemical one with chemical two",
                    "Cheet Sheet",
                    JOptionPane.INFORMATION_MESSAGE);
            paperpickup = true;

        }
    });
    return btnPaper;
}

public static Component btnKey() {
    JButton btnKey = new JButton();
    btnKey.setIcon(new ImageIcon(ChemistryDoor.class.getResource("/Images/key.png")));
    btnKey.setBounds(32, 469, 67, 50);
    btnKey.setOpaque(false);
    btnKey.setBorderPainted(false);
    btnKey.setContentAreaFilled(false);

    btnKey.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {
            btnKey.setVisible(false);
            JOptionPane.showMessageDialog(new JFrame(),
                    "This key looks like it unlocks something you need.",
                    "Key",
                    JOptionPane.INFORMATION_MESSAGE);
            //btnKey_1.setVisible(true);
            keypickup = true;
        }
    });

    return btnKey;
}

}

Toolbar.java：

public class Toolbar {

public static Component bar() 
{
    JPanel panel = new JPanel();
    JToolBar toolBar = new JToolBar();
    toolBar.setBackground(Color.RED);
    toolBar.setBounds(0, 553, 782, 50);


    if(Items.flaskpickup == true)
    {
        JButton btnHydrogen = new JButton("Hydrogen");
        btnHydrogen.setIcon(new ImageIcon(ChemistryTeachersDesk.class.getResource("/Images/flask_small.png")));
        btnHydrogen.setVisible(true);
        toolBar.add(btnHydrogen);
        return btnHydrogen;
    }

    return panel.add(toolBar);
}

}

ChemistryTeachersDesk.java： （显示按钮/项目和工具栏）

    //Regular Buttons
    if(Items.flaskpickup == false) {
        contentPane.add(Items.btnFlask());
    }

    contentPane.add(Toolbar.bar());

我们的完整代码：https://github.com/Mr-El/CIS319-T6-EscapeRoom

可执行文件：https://drive.google.com/open?id=0B-wvAphtOemebTRlZThlY19Rb00

Answer 1

问题是您在应用程序启动时创建了所有UI组件，并且在应用程序更改静态标志后不会刷新它。此代码仅在启动时执行一次：

 if(Items.flaskpickup == true)
    {
        JButton btnHydrogen = new JButton("Hydrogen");
        btnHydrogen.setIcon(new ImageIcon(ChemistryTeachersDesk.class.getResource("/Images/flask_small.png")));
        btnHydrogen.setVisible(true);
        toolBar.add(btnHydrogen);
        return btnHydrogen;
    }

布尔值设置为True不通过

1 个答案: