Closing a Dialog Box within a Frame
When a user clicks a button I want them to see a Dialog Box pop up giving them a message saying "Debeg Mode is Enabled". I have a panel that has a label and a button that says ok. When the user hits ok I want the Dialog Box to go away. Unfortunately when I do that the box will go away but I get a stack Trace that says the following...... My code is attached below. I would like to know the correct way of closing a dialog box when a button within the dialog box so I won't get a stack trace. The most important code you will find is in the frameApplet class in the actionPerformed where the dialog box gets shown.
Button in buttonApplet class was pressed.
Dialog Button was pressed
An Illegal Exception Was caught.
java.security.AccessControlException: access denied (java.lang.RuntimePermission
exitVM)
at java.security.AccessControlContext.checkPermission(AccessControlConte
xt.java:272)
at java.security.AccessController.checkPermission(AccessController.java:
399)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:545)
at java.lang.SecurityManager.checkExit(SecurityManager.java:765)
at java.lang.Runtime.exit(Runtime.java:91)
at java.lang.System.exit(System.java:701)
at frameApplet.actionPerformed(frameApplet.java:55)
at java.awt.Button.processActionEvent(Button.java:329)
at java.awt.Button.processEvent(Button.java:302)
at java.awt.Component.dispatchEventImpl(Component.java:2595)
at java.awt.Component.dispatchEvent(Component.java:2499)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:336)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:134)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:101)
at java.awt.Dialog.show(Dialog.java:386)
at frameApplet.buildGui(frameApplet.java:38)
at frameApplet.<init>(frameApplet.java:17)
at buttonApplet.actionPerformed(buttonApplet.java:23)
at java.awt.Button.processActionEvent(Button.java:329)
at java.awt.Button.processEvent(Button.java:302)
at java.awt.Component.dispatchEventImpl(Component.java:2595)
at java.awt.Component.dispatchEvent(Component.java:2499)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:336)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:134)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:96)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:88)
Exception occurred during event dispatching:
java.lang.IllegalArgumentException: adding a window to a container
at java.awt.Container.addImpl(Container.java:339)
at java.awt.Container.add(Container.java:231)
at frameApplet.buildGui(frameApplet.java:40)
at frameApplet.<init>(frameApplet.java:17)
at buttonApplet.actionPerformed(buttonApplet.java:23)
at java.awt.Button.processActionEvent(Button.java:329)
at java.awt.Button.processEvent(Button.java:302)
at java.awt.Component.dispatchEventImpl(Component.java:2595)
at java.awt.Component.dispatchEvent(Component.java:2499)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:336)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:134)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:96)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:88)
Code
buttonApplet
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class buttonApplet extends Applet implements ActionListener {
Button _buttonSubmit = new Button("Submit");
frameApplet frames;
public void init() {
add(_buttonSubmit);
_buttonSubmit.addActionListener(this);
}
public void actionPerformed(ActionEvent evt) {
Object source = evt.getSource();
if (source == _buttonSubmit) {
System.out.println("Button in buttonApplet class was pressed.");
frames = new frameApplet();
}
}
}
frameApplet
import java.awt.*;
import java.awt.event.*;
public class frameApplet extends Frame implements ActionListener {
private WindowEvent windowEvent;
private Button _dialogButton;
private Label _labelDebug;
private Dialog _dialogWindow;
private Window _windowFrame;
private Panel _panelObjects;
public frameApplet () {
super();
buildGui();
}
private void buildGui() {
this.enableEvents(AWTEvent.WINDOW_EVENT_MASK);
this.setBackground(Color.lightGray);
this.setForeground(Color.blue);
this.setLayout(new FlowLayout());
_labelDebug = new Label("Debug is now Enabled");
_dialogButton = new Button("Ok");
_dialogButton.addActionListener(this);
_panelObjects = new Panel();
_panelObjects.add(_labelDebug);
_panelObjects.add(_dialogButton);
_dialogWindow = new Dialog(this, "Information", true);
_dialogWindow.add(_panelObjects);
_dialogWindow.pack();
_dialogWindow.show();
this.setSize(150,75);
this.add(_dialogWindow);
this.setVisible(false);
}
public void actionPerformed(ActionEvent evt) {
try {
Object source = evt.getSource();
if (source == _dialogButton) {
System.out.println("Dialog Button was pressed");
_dialogWindow.hide();
this.hide();
_dialogWindow.dispose();
this.dispose();
System.exit(0);
}
}
catch(Exception e) {
System.out.println("An Illegal Exception Was caught.");
e.printStackTrace();
}
}
}
