a applet is not working in browser(Help me i am struck'd)

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December 3rd, 2012, 12:24 PM
bhavesh

a applet is not working in browser(Help me i am struck'd)

i have made a HelloWorld applet(running in appletviewer in EclipseIDE) , now i just wanted to run it from my browser but it is not running.
code as follows.
package com.bhaveshjava.trial;
import java.awt.Graphics;
public class HelloWorld extends java.applet.Applet {
public void init() {
resize(250,250);
}
public void paint(Graphics g) {
g.drawString("Hello world!", 150, 100);
}
}

and htmlfile
<HTML>
<HEAD>
<TITLE> A Simple Program </TITLE>
</HEAD>
<BODY>

Here is the output of my program:
<APPLET CODE="com.bhaveshjava.trial.HelloWorld" codebase="./bin" WIDTH=150 HEIGHT=255>
</APPLET>
</BODY>
</HTML>

further both the HelloWorld.class and Hello.html are in the same folder, still in browser it is showing the "Here is the output of my program:" after that an error
message.
Details of error message are provided
Java Plug-in 1.6.0_35
Using JRE version 1.6.0_35-b10 Java HotSpot(TM) Client VM
User home directory = C:\Users\bhavesh
----------------------------------------------------
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
----------------------------------------------------

load: class com.bhaveshjava.trial.HelloWorld not found.
java.lang.ClassNotFoundException: com.bhaveshjava.trial.HelloWorld
at sun.plugin2.applet.Applet2ClassLoader.findClass(Un known Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(U nknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Un known Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Un known Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unk nown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unk nown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionR unnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception: java.lang.ClassNotFoundException: com.bhaveshjava.trial.HelloWorld
December 3rd, 2012, 12:27 PM
bhavesh

a applet is not working in browser
i have made a HelloWorld applet(running in appletviewer in EclipseIDE) , now i just wanted to run it from my browser but it is not running.
code as follows.
Code java:

package com.bhaveshjava.trial; import java.awt.Graphics; public class HelloWorld extends java.applet.Applet { public void init() { resize(250,250); } public void paint(Graphics g) { g.drawString("Hello world!", 150, 100); } }
and htmlfile
<HTML>
<HEAD>
<TITLE> A Simple Program </TITLE>
</HEAD>
<BODY>

Here is the output of my program:
<APPLET CODE="com.bhaveshjava.trial.HelloWorld" codebase="./bin" WIDTH=150 HEIGHT=255>
</APPLET>
</BODY>
</HTML>

further both the HelloWorld.class and Hello.html are in the same folder, still in browser it is showing the "Here is the output of my program:" after that an error
message.
Details of error message are provided
Java Plug-in 1.6.0_35
Using JRE version 1.6.0_35-b10 Java HotSpot(TM) Client VM
User home directory = C:\Users\bhavesh
----------------------------------------------------
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
----------------------------------------------------

load: class com.bhaveshjava.trial.HelloWorld not found.
java.lang.ClassNotFoundException: com.bhaveshjava.trial.HelloWorld
at sun.plugin2.applet.Applet2ClassLoader.findClass(Un known Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(U nknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Un known Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Un known Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unk nown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unk nown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionR unnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception: java.lang.ClassNotFoundException: com.bhaveshjava.trial.HelloWorld
December 3rd, 2012, 12:37 PM
Norm

Re: a applet is not working in browser(Help me i am struck'd)

Where is the com folder?

It will be easier if you remove the package statement and have the class file(s) in the same folder with the html file.
December 3rd, 2012, 10:10 PM
bhavesh

Re: a applet is not working in browser(Help me i am struck'd)

there are two folders locations.
src/com/bhaveshjava/trial/HelloWorld.java also Hello.html is in this trial folder

bin/com/bhaveshjava/trial/HelloWorld.class also Hello.html is in this trial folder

html is located in both the places, but i am executing the one in which HelloWorld.class is located
December 4th, 2012, 07:18 AM
Norm

Re: a applet is not working in browser(Help me i am struck'd)

Try removing the package statement and put all the files in the same folder.

Otherwise you must make sure the folders are in the correct locations.
December 4th, 2012, 10:25 AM
bhavesh

Re: a applet is not working in browser(Help me i am struck'd)

Sorry buddy but din work in that way....
Still error!
December 4th, 2012, 10:34 AM
Norm

Re: a applet is not working in browser(Help me i am struck'd)

Quote:

Still error!

Please post the full text of the error message. Also Please post the new code and html and describe where all the files are located.
December 4th, 2012, 01:31 PM
bhavesh

Re: a applet is not working in browser(Help me i am struck'd)
the error msg generated after moving all files in same folder is as follows:

Java Plug-in 1.6.0_35
Using JRE version 1.6.0_35-b10 Java HotSpot(TM) Client VM
User home directory = C:\Users\bhavesh
----------------------------------------------------
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
----------------------------------------------------

java.lang.NoClassDefFoundError: HelloMaster (wrong name: com/bhaveshjava/lesson5/HelloMaster)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknow n Source)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Un known Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(U nknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Un known Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Un known Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unk nown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unk nown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionR unnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception: java.lang.NoClassDefFoundError: HelloMaster (wrong name: com/bhaveshjava/lesson5/HelloMaster)

now the code for HelloMaster.java
Code Java:

import java.awt.Graphics; @SuppressWarnings("serial") public class HelloMaster extends java.applet.Applet{ public void init(){ resize(450,400); } public void paint(Graphics g){ g.drawString("Hello Sir",200,150); } }
[code=html]
<html>
<head>
<title>Hello Master</title>
</head>
<body>this is the class
<BR>
<applet code="HelloMaster.class" width="600" height="600">
</applet>

</body>
</html>

[/html]

All the three files Hell.html,HelloMaster.java. HelloMaster.class are in same folder src.com.bhaveshjava.lesson5

before the HelloMaste.class was located in bin.com.bhaveshjava.lesson5 and a Hell.html file was also there with this class file in ./bin

i tried all alternatives but failed, i know there is some logical error...
but as per applet is considered , logically since before only both the class file and html page are in same folder. it is not the matter of output , it is all about logic, which i applied correctly.
Now help me if my approach is wrong
December 4th, 2012, 01:37 PM
Norm

Re: a applet is not working in browser(Help me i am struck'd)

Quote:

java.lang.NoClassDefFoundError: HelloMaster (wrong name: com/bhaveshjava/lesson5/HelloMaster)

Where did that package name come from? Did you compile the source without the package statement? Make sure you are using the correct class file: the one without the package statement.
December 4th, 2012, 01:55 PM
bhavesh

Re: a applet is not working in browser(Help me i am struck'd)

no actually if i remove the package name the code itself is not getting compiled..
but wait i got output when i kept it in a default package...
explain me why i cant put it in a package?
N really thanks for your help.
December 4th, 2012, 02:11 PM
Norm

Re: a applet is not working in browser(Help me i am struck'd)

You can put it in a package. It just makes the setup for execution more complicated because all the paths and locations of files must be correct. Without a package, everything can go in one folder.