Applet in Tomcat-Urgent

hai to everybody,
i am using tomcat-4.1.27 and j2sdk-1.4.0_01 and i have
been trying to load simple applet in HTML page by running tomcat server
but it is displaying at the status bar as class not found, but it is
showing the message Loading applet in my HTML page but the content in applet is not getting displayed.Please help me.
reg,
arvind

hi,
i have attached code below
i am having a frame divided into two columns one is for html
one is for JSP
/*Frame.html */
<html>
<frameset cols="25% ,75%">
<frame src="App.html">
<frame src="Design.jsp">
</frameset>
</html>
In Design.jsp i am trying to display simple applet with a string message
the code is below
/*Design.jsp*/
<html>
<body>
Below it shows a simple applet
<h1>
<p align="center">
<center>
<jsp:plugin type="applet" code="SimpleBanner.class" width="300" height="150" codebase="arv/" jreversion="1.4">
</jsp:plugin>
</center>
</body>
</html>
In the above code the applet class file SimpleBanner is under the directory c:/arv/SimpleBanner and i am using tomcat 4.1.27 and j2sdk 1.4.0_01
/*SimpleBanner.java"*/
import java.applet.*;
import java.awt.*;
public class SimpleBanner extends Applet
public void init()
setBackground(Color.cyan);
setForeground(Color.red);
public void paint(Graphics g)
g.drawString("Henkel Spic",50,30);
when i try to run by giving url-http://localhost:8080/Frame.html
the page displays with applet size but not the string displaying inside
i don't know where the prob is.In the status bar it is showing
SimpleBanner.class not found.
help me.
reg arvind

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========Exception===========
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Assuming that your applet is not in a jar file (don't see a value for archive)
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the class should be in:
myJSPFileFolder\WEB-INF\classes
If you want to see when the jre is trying to load and where it it trying to load it from you
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C:\Program Files\Java\j2re1.4...\bin\jpicpl32.exe
In the advanced tab you can fill in something for runtime parameters fill in this:
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if you cannot start the java console check here:
C:\Documents and Settings\userName\Application Data\Sun\Java\Deployment\deployment.properties
I think for linux this is somewhere in youruserdir/java (hidden directory)
add or change the following line:
javaplugin.jre.params=-Djavaplugin.trace\=true -Djavaplugin.trace.option\=basic|net|security|ext|liveconnect
for 1.5:
deployment.javapi.jre.1.5.0.args=-Djavaplugin.trace\=true -Djavaplugin.trace.option\=basic|net|security|ext|liveconnect
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C:\Documents and Settings\your user\Application Data\Sun\Java\Deployment\log\plugin...log
I think for linux this is somewhere in youruserdir/java (hidden directory)
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Caused by: java.io.FileNotFoundException: http://server/location/filename.class (The system cannot find the path specified)

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Hi,
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applets
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jsp
html
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META-INF/MANIFEST.MF
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common/DataEvent.class
common/Facility.class
common/Link.class
DialogBox/
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DialogBox/DialogBox.class
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<html>
<head>

<meta HTTP-EQUIV=Pragma CONTENT=no-cache >
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%>
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width="300" height="150" >
<param name="PORT" value="8939" >
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%>
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<% }
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%>
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<% } %>
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Here are the values for codebase that I have tried so far:
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codebase="../applets/facility"
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My PC has the latest version of the JRE plugin 1.4.X.
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Maizo

Folks,
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Yes, i use this code
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PLEASE HELP!!!
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at sun.applet.AppletPanel.run(AppletPanel.java:292)
at java.lang.Thread.run(Thread.java:536)
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at sun.applet.AppletClassLoader.getBytes(AppletClassLoader.java:252)
at sun.applet.AppletClassLoader.access$100(AppletClassLoader.java:42)
at sun.applet.AppletClassLoader$1.run(AppletClassLoader.java:143)
at java.security.AccessController.doPrivileged(Native Method)
at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:140)
... 10 more
Regards Ralph

Your codebase doesn't look right -- probably should read (with an s at the end):
codebase="http://localhost:8080/examples/servlets"
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to a file named ChatImpl.class
;o)
V.V.

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A few pointers for using these forums:
* Once you post a question, don't create a new thread on the same subject--when you do that, you are spamming the forum and people don't like that.
* Remember that there are a lot of people asking for help and a much smaller number giving it. Note for example that in the last 24 hours alone, there were over 200 active threads in the general Java Programming forum.
* If you have to follow up on something you posted earlier, just reply to your own post.
* People in this forum are generally happy to answer specific questions about Swing components but you have essentially asked someone to write your application for you. You probably need to work through some of the Java tutorials:
http://java.sun.com/docs/books/tutorial/uiswing/

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import java.awt.*;
import java.awt.event.*;
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studBackB.addActionListener(this);
courB.addActionListener(this);
studForB.addActionListener(this);
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student id FIND course id FIND
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address________________________________________
city______province___________p.code______________
phone__________e-mail_______coordinator___________
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the ones in caps are buttons and the rest are labels with text fields beside most of the labels.
i apologize for the extremely long question but i hope this is what you were looking for to give me some help...anything would be greatly appreciated!!
thanks in advance for anything someone can do for me

hi,
may this helps to solve your problem
import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
public class Registry4b extends Applet implements ActionListener {
TextField sid;
TextField cid;
public void init() {
backgroundColor = new Color(200,255,255);
setLayout(new GridLayout(2,1)); // 2 rows, one column, first row for search, the second for output
Panel up=new Panel(new GridLayout(3,1)); // search panel
Panel down=new Panel(new GridLayout(1,1)); //output panel
down.add(new Label("Just for the output"));
Panel p1=makePanel(new GridLayout(1,7),backgroundColor);
makeButtons();
p1.add(studBackB);
p1.add(studB);
p1.add(studForB);
p1.add(clearB);
p1.add(courBackB);
p1.add(courB);
p1.add(courForB);
up.add(p1);
Panel p2=makePanel(new GridLayout(1,3),backgroundColor);
p2.add(makeLabel("Student ID"));
sid=new TextField("");
p2.add(sid);
p2.add(studFindB);
up.add(p2);
Panel p3=makePanel(new GridLayout(1,3),backgroundColor);
cid=new TextField("");
p3.add(makeLabel("Course ID"));
p3.add(cid);
p3.add(courFindB);
up.add(p3);
add(up);
add(down);
private Label makeLabel(String label) {
Label label1 = new Label(label,Label.RIGHT);
label1.setFont(new Font("Courier",Font.BOLD,10));
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//appletHeight = 8*(2+courBackB.getSize().height);
appletWidth=200;
appletHeight=90;
public void paint(Graphics g) {
setSize(appletWidth,appletHeight);
validate();
public void actionPerformed(ActionEvent e) {
String s = (String)e.getActionCommand();
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b.setBackground(color);
b.setFont(font);
return b;
private Panel makePanel(LayoutManager lm, Color c) {
Panel p = new Panel();
p.setLayout(lm);
p.setBackground(c);
return p;
private void makeButtons() {
Font f = new Font("Courier", Font.BOLD, 10);
Color grey = new Color(255,100,100);
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studB = makeButton(" STUDENTS ",grey,f);
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courFindB = makeButton("FIND",grey,f);
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courB = makeButton(" COURSES ",grey,f);
courBackB = makeButton("<-",grey,f);
courForB = makeButton("->",grey,f);
TextField addressTF = new TextField("ADDRESS", 10);
static final String initialString = " ";
String Filler = " ";
Panel row1, row2, row3, p1;
int appletWidth, appletHeight;
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Color backgroundColor;
}interesting for you is only the init()
regards

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Refresh applet sqlj NullPointerException URGENT!

I have the following sqlj code in an applet to retrive data from an oracle database. After this the code goes onto draw the data in the applet using AWT (that code isn't shown here). My trouble is that when I get to the following line Connection con = Oracle.connect("jdbc:oracle:thin:@ebalpha:1525:ORCL", "flowmanager", "xxxxx").getConnection(); I get a Null Pointer exception only after refreshing the page using F5.
So to overcap I get a NullPointerException only when I refresh the applet. It runs perfectly the first time. The applet need to be refreshed because the data in the table get updated and the applet need to be refreshed to show the data changes.
public void getFlowSpaceData() throws SQLException {
// MyIter iter;
String strUserName = getParameter("paramUserName");
String strFlowName = new String();
Connection con = Oracle.connect("jdbc:oracle:thin:@ebalpha:1525:ORCL", "flowmanager", "xxxxx").getConnection();
strQuery = "select FLOWNAME FROM FLOWMANAGER.TMP_FLOWNAMES WHERE USERNAME ='" + strUserName +"'";
PreparedStatement pstmt0 = con.prepareStatement(strQuery);
ResultSet rs0 = pstmt0.executeQuery();
while (rs0.next()) {
strFlowName = rs0.getString(1);
rs0.close();
pstmt0.close();
strQuery = "select FLOWNAME, USERNAME, PANELROW, PANELCOL, RELATEROW, RELATECOL, OBJTYPE, BASECODE, INDUSTRYID, PANELNUM, BUSINESSPROCESSID FROM flows WHERE flowname ='" + strFlowName + "' AND username ='" + strUserName +"' ORDER BY PANELNUM";
PreparedStatement pstmt1 = con.prepareStatement(strQuery);
ResultSet rs1 = pstmt1.executeQuery();
int r = 0;
int c = 0;
while (rs1.next()) {
intObjType[r][c]= rs1.getInt(7);
strID[r][c] = rs1.getString(11);
//strIDQuery = strIDQuery + 'or ID =' + strinID
intRowRelation[r][c] = rs1.getInt(5);
intColRelation[r][c] = rs1.getInt(6);
c++;
if(c > 4) {
r++;
c = 0;
rs1.close();
pstmt1.close();
PreparedStatement pstmt2 = con.prepareStatement(strQuery);
ResultSet rs2 = pstmt2.executeQuery();
r = 0;
c = 0;
int i = 0;
int intSTRLENGTH = 0;
while(i < 24){
strQuery = "select name, descr, role from BUSINESSPROCESS WHERE ID = '" + strID[r][c] + "'";
pstmt2 = con.prepareStatement(strQuery);
rs2 = pstmt2.executeQuery();
rs2.next();
intSTRLENGTH = rs2.getString(1).length();
if (intSTRLENGTH > 17){
strLabel1[r][c] = rs2.getString(1).substring(0,17);
strLabel2[r][c] = rs2.getString(1).substring(18,intSTRLENGTH);
}else {
strLabel1[r][c] = rs2.getString(1).substring(0,intSTRLENGTH);
strLabel2[r][c] = " ";
intSTRLENGTH = rs2.getString(2).length();
if (intSTRLENGTH > 17){
strDescr1[r][c] = rs2.getString(2).substring(0, 17);
strDescr2[r][c] = rs2.getString(2).substring(18,intSTRLENGTH);
}else{
strDescr1[r][c] = rs2.getString(1).substring(0,intSTRLENGTH);
strDescr2[r][c] = " ";
c++;
i++;
if(c > 4) {
r++;
c = 0;
rs2.close();
pstmt2.close();
con.close();
con = null;
Thanks for you Assistance! It's greatly appreciated!
Chris Wallace

After further research I notice that if I Clear classload cache after every load before I refresh the applet it works fine. I can't have the user brining up the the consule windows and pressing x to clear classloader. Just thought I would give this futher information to help limit what the problem could be.

Deploying Applets on OAS (urgent help needed)

I have installed and Configured OAS 4.0.7.1 on Win Nt Server ( SP5)
I have created a very simple Java Applet using JDeveloper 1.1 and followed the deployment method as specified in the Work book (Student Work book).
I have modified the source to add the ARCHIVE line.Using the Deployment Wizard I have created the archive file (.jar).
I have the Java class files and the archive file in the same directory.
I have added a HTTP Listener with port 90 and set the Directory for Virtual path corresponding to the directory where the java class files and archive files are available.
Now when I enter the URL for the invoking HTML file from the Browser the Applet seems to be loading but it doesn't. The error message at the bottom of the Applet(looks like the Applet Window):
load: <packagename>.<classname> cannot be instaniated.
Please help me to resolve the problem at the earliest.
Thanks
Thiru

Marcosk2,
I am still having problems.
kindly tell me the steps in detail.
what i have done is:
1.i have a simple applet (with frame) with a button.
2. I have edited the html file and included the following:
CODEBASE="imtac" -the virtual directory name
ARCHIVE = "carclas.zip"
3.with Deployment Wizard I have created the zip file (carclass.zip);
Whe I run the Applet (in JD1.1) it is not running as it is looking for the path (imtac) but if i remove the virtual path (imtac) then the applet runs. You asked me to include the virtual path name in the CODEBASE parameter.
Please do let me know in steps so that i too can deploy the applets in the WEB.
It will be of great help even if u give me your telephone no with country code and area code so that I could talk to u and make things workable here. ( i am in Oman).
I have to give a demo tomorrow.
Thanks

Deployment in tomcat-URGENT

I AM USING TOMCAT 5.5 WHICH IS IN THE DIRECTORY D:\Program Files\Apache Software Foundation. But I Can't understand how to & where to deploy .jsp file.
ppl. help me in this regard.

You can't understand??? It's not higher mathematics or anything, all you need to do is find a simple tutorial (which the net is loaded with) and try it out :s If all else fails the manual is a good bet.
http://tomcat.apache.org/tomcat-5.5-doc/appdev/index.html

Applet Loading Time - Urgent

I am facing a problem on one of our production sites. The APPLET(deployed on weblogic server) is taking a huge time to load, of the order of 15 minutes. Even after it is cached on first time loading, the subsequent access to APPLET still takes same time.
Whileas in our testing we didn't encounter such problem. Of course, at customer site i see that the machine using IE(client) is on a different LAN than the weblogic server whileas most of our in house tests were done on same LAN
what could be the possible reasons for this?

Some suggestions could be:
1. Bundle all classes and resource files in a jar file.
2. Try to preload the heavier files (e.g. sound files) in a background thread, instead of init() method. See an example for this in Sun's Java tutorial, under the trail 'Sound'.

Applet in Tomcat-Urgent

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