Combining Applet with JFrame

Hi
I have a JFrame GUI which obvisouly extends JFrame. in the GUI i have an ok button. what i want the GUI to be able to do is when the ok button is pressed the applet will pop up. class that runs the applet and class that has JFrame are two seperate classes. In the Actionlistener for the OK button i call the init method of the applet. But the applet doesnt come up. Is there a way around it? or can this be done?.

Well I'm not sure why you want to launch an applet from an application. Applets are not meant to be used that way. In fact, the context is automatically assumed to be a web browser. In any event, I believe the browser calls both init and start on the applet. So try calling start(). Not sure if that will work.

Similar Messages

All is fine with JFrame, but the same code doesn't work in JApplet?

I try to manage XML files using Xerces-perser,
and all is ok if I work with JFrame,
but when I try to do the same thing in JApplet,
I get ClassDefNotFound error at the initializing
of applet. It writes that the problem is with
Xerces-classes (org.w3c.dom.Node f.e.),
it seems to me that "appletviewer" (1.3.01) which
I use to launch JApplet doesn't see these classes,
while "java" does when I do the same with JFrame.
May be, do you have some ideas?

add "crimson.jar" and "jaxp.jar" in your archive list in your html, which lunch your applet.

Help creating a login applet with JDBC

Hi, I'm trying to create a login applet using a table from a database (created with Microsoft Access). The bottom line is that I have very little knowledge of ActionListeners. I do know some things about JDBC, but most of it is through notes and lots of reading. I was wondering how to go about looking through a table (with two columns, user and password), to see if it matches what is typed into a JTextField and a JPasswordField. Just a sample piece of code would be helpful. Thank you very much in advanced. Also, I have the GUI done for what I need, just no ActionListeners or JDBC functionality implemented. Here it is:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.sql.*;
public class login extends JFrame /*implements ActionListener*/ {
     private Container container;
     private GridBagLayout layout;
     private GridBagConstraints gbc;
     public login()
          super("Login");
          setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setSize(300,130);
        setLocationRelativeTo(null);
          container = getContentPane();
          layout = new GridBagLayout();
          container.setLayout(layout);
          gbc = new GridBagConstraints();
          labelUser = new JLabel("Username:");
          gbc.insets = new Insets(2,2,2,2);
          container.add(labelUser, gbc);
          textUser = new JTextField(15);
          gbc.gridx = 1;
          gbc.gridwidth = 3;
          container.add(textUser, gbc);
          labelPassword = new JLabel("Password:");
          gbc.gridy = 1;
          gbc.gridx = 0;
          gbc.gridwidth = 1;
          container.add(labelPassword, gbc);
          textPassword = new JPasswordField(15);
          gbc.gridx = 1;
          gbc.gridwidth = 3;
          container.add(textPassword, gbc);
          button1 = new JButton("Login");
          gbc.gridy = 2;
          gbc.gridx = 1;
          gbc.gridwidth = 1;
          container.add(button1, gbc);
          button2 = new JButton("Cancel");
          gbc.gridx = 2;
          container.add(button2, gbc);
     public static void main(String args[]) {
        new login().setVisible(true);
    private JButton button1, button2;
    private JLabel labelUser, labelPassword;
    private JTextField textUser;
    private JPasswordField textPassword;
}Thank you again in advanced.

Sir,
Much of your question makes middling sense to me. You say applet but you have JFrame for example. I would caution you right now an applet with access for a DB is asking for trouble. Never minding the various security issues Access is not really intended for this sort of operation.
Now none of that actually seems to be your question but I just thought I'd address that before you go too far down a road fraught with peril.
As far as what I think you are asking assuming our table looks like this.
tblUser
username VARCHAR (access text field) primary key
password VARCHAR (again known in access as text)then the code would look something like this...
Connection c; //create your connection
PreparedStatement ps = c.prepareStatement("SELECT username FROM tblUser WHERE username=? AND password=?");
ps.setString(1,usernameVariable);
ps.setString(2,passwordVariable);
ResultSet rs = ps.executeQuery();
if(rs.next()){
// login successful
}else{
// login failed!
rs.close();
ps.close();
c.close();Also duffymo will be unhappy if I don't mention that you will really want to give second thought to mixing your database code with your GUI code. Please take a gander through http://java.sun.com/blueprints/patterns/MVC.html
Sincerely,
Slappy

Can't Copy text unless console is opened before applet with JTextField

If an applet uses JTextFields, it is impossible to copy text from the console to the clipboard (or anywhere else) if the console is opened after the applet.
See http://demo.capmon.dk/~pvm/nocopy/nocopy.html for a working applet with source and class file to try it out on...
So if something bad has happened, and there are hints in the console e.g. a stack trace, it all has to be retyped by hand, since all Copy or export is impossible...
Does anyone know of a workaround for this? I'd like to be able to e.g. copy stack traces to bug reports.
Try these test cases:
* Close all browser windows. Open a browser and visit this page. After the page with this applet has loaded, then open the console with "Tools/Sun Java Console" (or "Tools/Web Development/Java Console" in Mozilla). Select some text in the console. There is no way to put this text on the clipboard; the "Copy" button doesn't work, and neither does CTRL+Insert, CTRL+C or anything else.
* Close all browser windows. Open a browser window no some non-java page and then open the console with "Tools/Sun Java Console" (or "Tools/Web Development/Java Console" in Mozilla). Then visit this page. Select some text in the console. Now the "Copy" button does work, enabling "export" of e.g. stack traces to other applicaitons e.g. email.
The difference is which is opened first: The console or the applet. If you look at the very rudimentary Java source code, it is the mere creation of a JTextField is what disables or breaks the Copy functionality.
I've tried this on Windows XP with IE 6.0 and Mozilla 1.3 and they behave exactly the same. The JVM is Sun's 1.4.2 and I've tried 1.4.1_02 also with the same behavior. I've also tried javac from both 1.4.2 and 1.4.1_01

hey .. this seems like a bug.. can you please file a bug at
http://java.sun.com/webapps/bugreport
thanks...

Problem with JFrame, it goes blank

i
My problem is with JFrame, when it's carrying operation which takes a bit of time, if somethhing goes on
top of the frame the frame goes blank, all the components vanished and when the operation is completed the components bacome visible. I dont know why this is happening,. The code is below, since my code is very complicated I am sending some code whcih shows the problem I have, when you press the button it execute's a for loop, whcih takes some time. If you minimize the frame and maximize again, you'll see what I mean.
Please help!!!
Many Thanks
Lilylay
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Frame1 extends JFrame {
JPanel contentPane;
JButton jButton2 = new JButton();
/**Construct the frame*/
public Frame1() {
enableEvents(AWTEvent.WINDOW_EVENT_MASK);
try {
jbInit();
catch(Exception e) {
e.printStackTrace();
/**Component initialization*/
private void jbInit() throws Exception {
//setIconImage(Toolkit.getDefaultToolkit().createImage(Frame1.class.getResource("[Your Icon]")));
contentPane = (JPanel) this.getContentPane();
contentPane.setLayout(null);
this.setSize(new Dimension(407, 289));
this.setTitle("Frame Title");
contentPane.setBackground(SystemColor.text);
contentPane.setForeground(Color.lightGray);
jButton2.setText("Press me!");
jButton2.setBounds(new Rectangle(107, 111, 143, 48));
jButton2.addMouseListener(new java.awt.event.MouseAdapter() {
public void mousePressed(MouseEvent e) {
jButton2_mousePressed(e);
contentPane.add(jButton2, null);
/**Overridden so we can exit when window is closed*/
protected void processWindowEvent(WindowEvent e) {
super.processWindowEvent(e);
if (e.getID() == WindowEvent.WINDOW_CLOSING) {
System.exit(0);
void jButton2_mousePressed(MouseEvent e) {
for(int i=0; i<256898; i++){
for(int j=0; j<5656585; j++){
System.out.println("hello");
public static void main(String [] args){
Frame1 frame=new Frame1();
frame.show();
}

The reason this is happening is because your loop is so intensive that your program doesn't have time to refresh its JFrame. There is no great way to get past this stumbling block without decreasing the efficiency of your code. One possible solution is to call repaint() from within your loop, but of course this slows down your loop.
Hope that helps

Problem with JFrame's dispose();

Hello everyone,
I'm having a problem with JFrame's dispose() method. In my program I have 2 classes which go into full screen. On each screen there is a button to switch to the other screen. The first time I push the button on both of them the other screen closes, which is what I want. However, if I push the same button more than twice - like by going from Screen1 to Screen2 and Screen2 to Screen1 and then Screen1 to Screen2 - I get 2 screens. If I keep doing that I eventually get 10+ screens up, which is bad. How do I prevent that?

There's a lot of code, so I'll just post up the part that does it.
backButton.addActionListener(new ActionListener()
              public void actionPerformed(ActionEvent e)
                  soundManagerM.close();
                    new MenuScreen().setVisible(true);
                    dispose();
         });I don't think it opens up 2 at once, because it would play multiple music right?

Help! How to Open a Frame from applet with

Hey all. I need help =).
I want:
1. Have 1 class extends applet with running thread (this far no prob)
2. Open a new frame from the applet (no prob)
3. Start a new thread which is operating "inside" the new Frame/class
4. Draw a simple Rect in the new Frame with the new thread to test that the graphics work.
Plz help,
~Trobsky

�rr..... i cant draw on the Frame =(.
Heres the code:
�
public class Fonster extends java.applet.Applet {
     Frame myFrame;
     Fri friFonster=new Fri();
     public void init() {
          myFrame=new Frame();
          myFrame.resize(300,300);
          myFrame.show();
          myFrame.add(friFonster);
          friFonster.init();
          friFonster.start();
     public void paint(Graphics g)
          g.drawRect(10,10,100,100);
public class Fri extends java.applet.Applet {
     public void init(){
          repaint();
     public void paint(Graphics g)
          g.drawRect(10,10,200,200);

How to make an applet with curved edges in the browser

Hi all,
I m doing an applet application in which i want to show an image inside a player in the website. The edges of the player is designed in curved shape. So i too wanted to do an applet with curved edges. Otherwise my applet and the images are coming out of the player... do any body have come across such a problem. please give me some suggestions. Awaiting for your suggestions and solutions. If u don't understand what i m trying to say let me know..
Thanks...

I tried to get the screen height -1 and subtract from
all the ys in my applet but it doesnt work all the
time. I am drawing shapes and stuff with an algorithm
I wrote for class.
is there a way to get origin(0,0) to the lower left
screen easily.
thanksThe only way I can think of would be write a method to convert a "normal" y coord to an applet y coord. That would probably end up being a huge pain in the ass, since you would have to pass all y coords through it before using them, so I suggest you just get used to y being upside down.

How to combine BOMs with Free Goods?

Dear all.
I am currently working on setting up a retail store in SAP ERP (6.0). Our client requires from us creating a functionality that would allow to create sets and add free goods to a certain set. For example: if you buy a set consisting of a hammer and a drill at a regular price, you get a pair of gloves free of charge.
We used BOMs to create the sets and attempted to combine them with Free Goods, which prooved impossible -- FGs don't work with BOMs. We also tried to use Bonus Buys, but these seem to be working only with SAP Retail, which is not available to us.
Do you know any way around this problem?
Grzegorz

Shantanu
It sounds pretty helpful, however, what we just found out it is impossible to give away free goods according to the local tax standards - so we have to give them away for a fraction of the price rather than free of charge. This forced us to create a separate logic to deduce different item categories in a sales order and different prices according to that.
Thanks anyway.
Grzegorz

Combining results with a Query of Queries - NOT QUITE THERE!!!

I have included a small sample of my database, specifically the four tables I am trying to work with in the hopes that someone can steer me down the right path. Here are the four tables and the bottom is a visual desciption of what I am trying to achieve;
ORDERS
SALES CALLS
ID
SaleDate
TerritoryManager
UserID
SaleDate
TerritoryManager
ID
UserID
426
01-Oct-09
Mike B
10112
10/1/2009
Mike B
253
10112
427
01-Oct-09
Russ C
10115
10/1/2009
Mike B
254
10112
430
01-Oct-09
Jerry W
10145
10/1/2009
Mike B
255
10112
432
01-Oct-09
Ron H
10118
10/1/2009
Mike B
256
10112
433
01-Oct-09
Ron H
10118
10/1/2009
Ron H
257
10118
10/1/2009
Ron H
258
10118
PRODUCTS ORDERED
10/1/2009
Ron H
260
10118
OrderID
Quantity
NewExisting
UserID
10/1/2009
Russ C
261
10115
426
12
0
10112
10/1/2009
Mike B
267
10112
427
2
0
10115
10/1/2009
Mike B
268
10112
427
3
1
10115
430
1
0
10145
USERS
430
1
0
10145
TerritoryManager
Zone
UserID
432
1
0
10118
Mike B
Central
10112
432
1
0
10118
Russ C
Central
10115
432
1
1
10118
Jerry W
Central
10145
432
1
1
10118
Ron H
Central
10118
433
2
1
10120
Don M
Central
10120
Central Zone
Ttl Calls
Ttl Orders
Ttl Items
Ttl New Items
Mike B
5
1
12
1
Russ C
1
1
5
Jerry W
1
2
Ron H
3
2
6
3
I have tried to achieve this result in many ways to no avail. If I try to combine PRODUCTS ORDERED with ORDERS I get an erroneous count. I finally resigned myself to getting all the info I needed with separate queries and then trying to combine them with a query of queries. This worked fine until the last query of queries which timed out with no results. I am a newbie and would appreciate any constructive help with this. I am including my queries below as well;
<cfquery name="qGetOrders" datasource="manna_premier">
SELECT Count(Orders.ID) AS CountOfID,
       Orders.UserID AS Orders_UserID,
    Users.UserID AS Users_UserID,
    Users.TMName
FROM Users INNER JOIN Orders ON Users.[UserID] = Orders.[UserID]
GROUP BY Orders.UserID, Users.UserID, Users.TMName;
</cfquery>
<cfquery name="qGetSalesCalls" datasource="manna_premier">
SELECT Count(Sales_Calls.ID) AS CountOfID,
       Users.UserID AS Users_UserID,
    Users.TMName,
    Sales_Calls.UserID AS Sales_Calls_UserID
FROM Users INNER JOIN Sales_Calls ON Users.[UserID] = Sales_Calls.[UserID]
GROUP BY Sales_Calls.UserID, Users.UserID, Users.TMName;
</cfquery>
<cfquery name="qGetProducts" datasource="manna_premier">
SELECT Count(ProductOrders.OrderID) AS CountOfOrderID,
       Sum(ProductOrders.Quantity) AS SumOfQuantity,
    Sum(ProductOrders.NewExisting) AS SumOfNewExisting,
    ProductOrders.UserID
FROM Orders INNER JOIN ProductOrders ON Orders.[ID] = ProductOrders.[OrderID]
GROUP BY ProductOrders.UserID;
</cfquery>
<cfquery name="qqCombOrd_Prod" dbtype="query">
SELECT *
FROM qGetOrders, qGetProducts
</cfquery>
<cfquery name="qqCombOrd_ProdtoSales" dbtype="query">
SELECT *
FROM qqCombOrd_Prod, qGetSalesCalls
</cfquery>
PLEASE HELP!!! I'm about to go scouting for bridges to leap from!

You might be able to simplify that query by getting rid of the subqueries. Something like this
SELECT TerritoryManager
, count(sc.userid) totalcalls
, sum(po.quantity) total
, sum(newexisting) totalnew
, count(o.userid) totalorders
from users u join salescalls sc on u.userid = sc.userid
join orders o on u.userid = o.userid
join productorders po on u.userid = po.userid
where userzone = 'CENTRAL'

Is it possible to replace applet with JSP

I m working for the extension of the a Chat Application which is Applet based...
It is slow as the Applet loaded...
Is it possible to replace the applet with th JSP....
what r the pro and cons of it???
Thanks in advance...

sure it is possible.
main difference is, that applet maintance a permanten connection to the server and therefor has a 'smaller' communication where as with servlets/jsp the client will have to communicate more information for each request.
have a look at pushlets.com, a servlet based framework that keeps the connection to the client open (works with hidden frames and dhtml). very smart framework.

Java 7: Problems launching applets with jars on "file://" location

Hi,
We are experiencing a problem when updating our client's JRE from Java6 U 21 up to Java7 U 55.
We have developed an Applet which is composed by several JAR files. Some of those JARs must be stored in local drive, and the JAR with the main Java class is stored on server.
Let's supose we have a similar scenario like this:
https://blahblahbah/bar.jar
https://blahblahbah/test.html
C:/foo.jar
The code of test.html:
<embed
archive="file:///C:/foo.jar"
cache_archive="bar.jar"
/>
This code works fine on Java 6 and Applet is correctly loaded.
However, with Java 7 a security exception is raised when trying to load JAR files from "file:///" location during Applet launch:
java.lang.SecurityException: Permission denied: file:/C:/foo.jar
    at sun.plugin2.applet.Applet2Manager._loadJarFiles(Unknown Source)
We have tried several tests using a java.policy file which grants all possible permisions:
grant codeBase "file:/C:/foo.jar" {
    permission java.security.AllPermission;
grant {
permission java.security.AllPermission;
We also tried to low Java's security level to "MEDIUM", with no success.
We finally only managed to run the Applet if we explicity disable the "Next-Generation Plugin" with Internet Explorer 8. However, that's not a suitable solution, and still does not work with Mozilla family browsers.
Eventhought with Mozilla browsers is still not working.
Is there any restrictions in Java 7 that prevents to read jars from being loaded from local drive when launching Applets?
Thanks in advance,

Thank you baftos.
I had read the whole message before posting mine. It's not the same problem. I'm able to run the sample signed applet always having the jar in the same location than the HTML page serving the applet via JNLP:
<jar href="SignedAppletTest.jar" main="true"/>
However, the security exception raises when trying to read that jar from local drive:
<jar href="file://C:/SignedAppletTest.jar" main="true"/>
ExitException[ 3]java.lang.SecurityException: Permission denied: file://C:/SignedAppletTest.jar
    at sun.plugin2.applet.JNLP2Manager.loadJarFiles(Unknown Source)
I have even tried to decompile JNLP2Manager class, without seeing anything useful on that loadJarFiles method
The only way I managed to avoid the problem is unchecking the New Generation Plugin and running the Applet with IE. Not a suitable solution for me at all..

Java Class not found when starting applet with ip address

Hi @all,
we use Application Server 10gR2 with Java 1.6.0_20 and we start the applet with an JNLP File.
When I use the url http://lhhap03/forms/java the applet starts as it should. But when I change the entry to http://192.168.17.208/forms/java i get the error:
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thomas

Problem Solved, I put many environment variables in the .bash_profile file, the CLASS_PATH will overwrite the weblogic server's classpath during startup.
Remove them and restart server solved my problem.

How to write a applet with multiple menu

Hi all,
How to write a applet with multiple menu or please tell me where can I get a examples
thanks

i'm writing a project and it seem not work with browser. If anyone can help please leave me a e-mail so that i can send my source to you.
Thanks so much

Jms signed applet with SP3

Hi,
          I am using a thin client version of weblogic client & jms jars for my signed applet.I am getting an exception when I try to initialize the applet without closing the browser window. This was an issue in SP2 and was reportedly fixed in SP3 but for some reason I dont see it working.
          I am using 1.4.2_05 as the jre for my java plugin and 8.1 SP3 for my weblogic. I see the messages these messages being printed in the logs
          +++ <Warining> Don't have permissions to access ThreadGroup. We strongly recommend to use signed applet.
          +++ <Warining> Proceed further without creating ThreadGroup.
          +++ <Warining> Don't have permissions to access ThreadGroup. We strongly recommend to use signed applet.
          +++ <Warining> Proceed further without creating ThreadGroup
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          javax.naming.NamingException: Unhandled exception in lookup [Root exception is org.omg.CORBA.COMM_FAILURE:   vmcid: SUN minor code: 208 completed: Maybe]
               at weblogic.corba.j2ee.naming.Utils.wrapNamingException(Utils.java:81)
               at weblogic.corba.j2ee.naming.ContextImpl.lookup(ContextImpl.java:237)
               at weblogic.corba.j2ee.naming.ContextImpl.lookup(ContextImpl.java:171)
               at javax.naming.InitialContext.lookup(Unknown Source)
               at com.vz.inms.client.applet.MyApplet.init(MyApplet.java:84)
               at sun.applet.AppletPanel.run(Unknown Source)
               at java.lang.Thread.run(Unknown Source)
          Caused by: org.omg.CORBA.COMM_FAILURE: vmcid: SUN minor code: 208 completed: Maybe
               at com.sun.corba.se.internal.iiop.IIOPConnection.purge_calls(Unknown Source)
               at com.sun.corba.se.internal.iiop.ReaderThread.run(Unknown Source)
          But in my case, the applet is signed and I can see it in the trace as well as I get a prompt whether I want to accept the signed applet when the applet is about to be invoked. I have signed the applet using my own certificate instead of one from verisign or other CA's. I dont think it should matter.
          Does anyone know if this was really fixed in SP3?
          This is what documentation for resolved issues for 8.1 SP3 says :
          CR120811
          When using the WebLogic thin client with an applet, concurrentModificationExceptions and JMSExceptions were thrown. Investigation showed that there were two problems:
          There was a problem with the Sun ORB implementation. An applet's virtual machine released AppletContext upon a browser refresh and stopped all threads in the applet context's thread group. When an ORB was initialized as part of an applet context, the reader threads were created in the applet context's thread group. When the browser was refreshed, the ORB reader threads were also stopped.
          The WebLogic thin client created two threads in the applet context group: a HeartbeatMonitor thread and a RequestTimer thread. When the browser was refreshed, these threads were stopped with others in the applet context group.
          The problems were solved with the following changes:
          The Sun ORB implementation changed in JDK 1.4.2_04 so that it creates the reader threads on a child thread group of the system thread group but not to the applet's context thread group. This change ensures the reader thread stays alive as long as the orb is alive or applet's JVM is alive.
          The WebLogic thin client TunnelResponse and HeartbeatMonitor threads are now created on a child thread group of the system thread group but not to the applet's context thread group. This change ensures these threads stay alive as long as applet's JVM is alive. The fix is provided only for signed applets.
          I would really appreciate if someone could give any insight to this problem.
          Thanks,
          Jatinder

I am also getting this error.
          BEA...is it possible to use an applet with JMS without signing it?

Combining Applet with JFrame

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