AWT Dialog類

介紹

對話框控件是一個用於采取某種形式的用戶輸入的標題和邊框的頂層窗口。

類的聲明

以下是聲明為java.awt.Dialog類：

public class Dialog
extends Window

字段域

以下java.awt.image類的字段：

static Dialog.ModalityType DEFAULT_MODALITY_TYPE -- 默認模態對話框的模態類型.

類的構造函數

S.N.	構造函數&說明
1	Dialog(Dialog owner) Constructs an initially invisible, modeless Dialog with the specified owner Dialog and an empty title.
2	Dialog(Dialog owner, String title) Constructs an initially invisible, modeless Dialog with the specified owner Dialog and title.
3	Dialog(Dialog owner, String title, boolean modal) Constructs an initially invisible Dialog with the specified owner Dialog, title, and modality.
4	Dialog(Dialog owner, String title, boolean modal, GraphicsConfiguration gc) Constructs an initially invisible Dialog with the specified owner Dialog, title, modality and GraphicsConfiguration.
5	Dialog(Frame owner) Constructs an initially invisible, modeless Dialog with the specified owner Frame and an empty title.
6	Dialog(Frame owner, boolean modal) Constructs an initially invisible Dialog with the specified owner Frame and modality and an empty title.
7	Dialog(Frame owner, String title) Constructs an initially invisible, modeless Dialog with the specified owner Frame and title.
8	Dialog(Frame owner, String title, boolean modal) Constructs an initially invisible Dialog with the specified owner Frame, title and modality.
9	Dialog(Frame owner, String title, boolean modal, GraphicsConfiguration gc) Constructs an initially invisible Dialog with the specified owner Frame, title, modality, and GraphicsConfiguration.
10	Dialog(Window owner) Constructs an initially invisible, modeless Dialog with the specified owner Window and an empty title.
11	Dialog(Window owner, Dialog.ModalityType modalityType) Constructs an initially invisible Dialog with the specified owner Window and modality and an empty title.
12	Dialog(Window owner, String title) Constructs an initially invisible, modeless Dialog with the specified owner Window and title.
13	Dialog(Window owner, String title, Dialog.ModalityType modalityType) Constructs an initially invisible Dialog with the specified owner Window, title and modality.
14	Dialog(Window owner, String title, Dialog.ModalityType modalityType, GraphicsConfiguration gc) Constructs an initially invisible Dialog with the specified owner Window, title, modality and GraphicsConfiguration

類方法

S.N.	方法&說明
1	void addNotify() Makes this Dialog displayable by connecting it to a native screen resource.
2	AccessibleContext getAccessibleContext() Gets the AccessibleContext associated with this Dialog.
3	Dialog.ModalityType getModalityType() Returns the modality type of this dialog.
4	String getTitle() Gets the title of the dialog.
5	void hide() Deprecated. As of JDK version 1.5, replaced by setVisible(boolean).
6	boolean isModal() Indicates whether the dialog is modal.
7	boolean isResizable() Indicates whether this dialog is resizable by the user.
8	boolean isUndecorated() Indicates whether this dialog is undecorated.
9	protected String paramString() Returns a string representing the state of this dialog.
10	void setModal(boolean modal) Specifies whether this dialog should be modal.
11	void setModalityType(Dialog.ModalityType type) Sets the modality type for this dialog.
12	void setResizable(boolean resizable) Sets whether this dialog is resizable by the user.
13	void setTitle(String title) Sets the title of the Dialog.
14	void setUndecorated(boolean undecorated) Disables or enables decorations for this dialog.
15	void setVisible(boolean b) Shows or hides this Dialog depending on the value of parameter b.
16	void show() Deprecated. As of JDK version 1.5, replaced by setVisible(boolean).
17	void toBack() If this Window is visible, sends this Window to the back and may cause it to lose focus or activation if it is the focused or active Window.

繼承的方法

這個類繼承的方法從以下類：

java.awt.Window
java.awt.Component
java.lang.Object

Choice 實例

選擇使用任何編輯器創建以下java程序 D:/ > AWT > com > yiibai > gui >

AwtControlDemo

package com.yiibai.gui;

import java.awt.*;
import java.awt.event.*;

public class AwtControlDemo {

   private Frame mainFrame;
   private Label headerLabel;
   private Label statusLabel;
   private Panel controlPanel;

   public AwtControlDemo(){
      prepareGUI();
   }

   public static void main(String[] args){
      AwtControlDemo  awtControlDemo = new AwtControlDemo();
      awtControlDemo.showDialogDemo();
   }

   private void prepareGUI(){
      mainFrame = new Frame("Java AWT Examples");
      mainFrame.setSize(400,400);
      mainFrame.setLayout(new GridLayout(3, 1));
      mainFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
            System.exit(0);
         }        
      });    
      headerLabel = new Label();
      headerLabel.setAlignment(Label.CENTER);
      statusLabel = new Label();        
      statusLabel.setAlignment(Label.CENTER);
      statusLabel.setSize(350,100);

      controlPanel = new Panel();
      controlPanel.setLayout(new FlowLayout());

      mainFrame.add(headerLabel);
      mainFrame.add(controlPanel);
      mainFrame.add(statusLabel);
      mainFrame.setVisible(true);  
   }

   private void showDialogDemo(){
      headerLabel.setText("Control in action: Dialog"); 
      Button showAboutDialogButton = new Button("Show About Dialog");
      showAboutDialogButton.addActionListener(new ActionListener() {
	     @Override
         public void actionPerformed(ActionEvent e) {
            AboutDialog aboutDialog = new AboutDialog(mainFrame);
            aboutDialog.setVisible(true);
         }
      });

      controlPanel.add(showAboutDialogButton);
      mainFrame.setVisible(true);  
   }

   class AboutDialog extends Dialog {
      public AboutDialog(Frame parent){
         super(parent, true);         
         setBackground(Color.gray);
         setLayout(new BorderLayout());
         Panel panel = new Panel();
         panel.add(new Button("Close"));
         add("South", panel);
         setSize(200,200);

         addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent windowEvent){
               dispose();
            }
         });
      }

      public boolean action(Event evt, Object arg){
         if(arg.equals("Close")){
            dispose();
            return true;
         }
         return false;
      }

      public void paint(Graphics g){
         g.setColor(Color.white);
         g.drawString("TutorialsPoint.Com", 25,70 );
         g.drawString("Version 1.0", 60, 90);      
      }
   }
}

編譯程序，使用命令提示符。到 D:/ > AWT 然後鍵入以下命令。

D:AWT>javac comyiibaiguiAwtControlDemo.java

如果冇有錯誤出現，這意味著編譯成功。使用下麵的命令來運行程序。

D:AWT>java com.yiibai.gui.AwtControlDemo

驗證下麵的輸出