JFrame-JDialog通信

Question

我有一个JFrame的主窗口，它有一个注册按钮在in.Click注册按钮和JDialog窗口弹出。

public void mouseClicked(MouseEvent e) { 
       Reg new1=new Reg(users); 
       new1.setVisible(true); 
      } 

该JDialog窗口有2个按钮 - >注册，取消。他们都必须做一些事情，并关闭对话窗口。

这就是我试过的。 在REG（对话窗口）---> btnCancel：

public void mouseClicked(MouseEvent e) { 
         dialog.dispose(); 
         System.out.println("Reg disposed by cancel button"); 
        } 

这将关闭只运行d窗口，但我想从主窗口中执行时，当d窗口（按钮点击）仍然存在像对象在主要fraim“类”并且不关闭。我该怎么办？我如何关闭它？

Answer 1

你需要某种方式为框架，以确定如何对话框在您Reg类封闭

// Why are you using a `MouseListener` on buttons?? 
// User use keyboards to, use an ActionListener instead 
public void mouseClicked(MouseEvent e) { 
    Reg new1=new Reg(users); 
    new1.setVisible(true); 
    switch (new1.getDisposeState()) { 
     case Reg.OK: 
      // Clicked Ok 
      break; 
     case Reg.CANCEL: 
      // Clicked cancel or was closed by press [x] 
      break; 
    } 
} 

然后，你需要保持对状态信息...

public class Reg extends JDialog { 
    public static final int OK = 0; 
    public static final int CANCEL = 1; 

    private int disposeState = CANCEL; 

    //... 

    public int getDisposeState() { 
     return disposeState 
    } 

    public void setDisposeState(int state) { 
     disposeState = state; 
    } 

然后你改变状态

// Why are you using a `MouseListener` on buttons?? 
// User use keyboards to, use an ActionListener instead 
public void mouseClicked(MouseEvent e) { 
    setDisposeState(CANCEL); 
    dialog.dispose(); 
    System.out.println("Reg disposed by cancel button"); 
} 

这一切都假设你的对话框是mo话说回来，当然DAL ...

现在，这一切，就个人而言，我会让你Reg类JPanel并将其添加到JOptionPane代替或使用CardLayout

看看：

• How to Use Buttons, Check Boxes, and Radio Buttons
• How to Write an Action Listeners
• How to Make Dialogs
• How to Use CardLayout

...更多细节