布尔设置为True不通过

Question

我和我的四人团队正在开发一个名为“Chemistry Escape Room”的高级Java面向对象编程类的游戏。我们的程序在JToolBar中收集了一些项目，这些项目通过Toolbar.java类保存每个类的项目。我们使用Items.java中布尔值设置为false的布尔值，然后一旦单击JButton，布尔值就设置为true，然后传递给Toolbar.java类，其中所有项存储在JToolbar中。

问题是，一旦项目设置为true，他们似乎不会保持真实。我设置if语句来检测布尔值是否为false，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的.java：（显示的按钮/项和工具栏）

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

    contentPane.add(Toolbar.bar()); 

我们全码：https://github.com/Mr-El/CIS319-T6-EscapeRoom

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

Answer 1

的问题是，您在启动创建所有的UI组件应用程序和应用程序更改静态标志后不刷新。 这个代码只有一次在启动时执行：

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; 
    }