JVM 1.4.2 source code ?

Where can I gett the source code of the JVM bundled with Java 1.4.2 ?

Looking for something like [J2SE 5.0 JDK Source Code|http://java.sun.com/javase/downloads/index_jdk5.jsp] (only for j2se 1.4.2))

Similar Messages

I want to see the source code of JVM

Can anyone tell me how to see the source code of JVM, but not the src.zip that including in the java libraries. I just want to know how Java is implemented.
Thanks a lot for any answer.

You can get the source code (written in C++) of Sun's VM under the Community Licence arangement. Not sure quite where it is on this site, but if you look for it, I'm sure you'll find it.
BTW, it's not easy reading.
Sylvia.

JVM Source code

Hi all,
Does anybody know from where can i get the Sun's JVM source code.
Thanks
Hashin

You should be able to "make product" to create a libjvm.so for the server JVM, or "make product1" to create a libjvm.so for the client JVM. Then use that libjvm.so to replace the libjvm.so in an installed JDK: e.g., jre/lib/sparc/server/libjvm.so or jre/lib/sparc/client/libjvm.so. Then run the bin/java command from that JDK and it should find your modified libjvm.so. (You'll probably want a separate installation to play with, since you wouldn't want to accidently break your real JDK.)
The "make jvmg" and "make jvmg1" targets will make libjvm_g.so files (for the server and client, respectively) that you can use with the java_g commands to get (much) more internal assertion checking and better symbols for debugging, etc. (I gather you are working with JDK-1.5.0, rather than JDK-1.6.0, which has a slightly different structure.)

Where to download JVM source code? Thanks.

AhJin

Hi,
The JVM consists of the ClassLoader,ByteCode Verifier,and JIT.Now for the developing of the JVM you require to develop all three parts.But Classloader again have BootStrap Classloader,Extension ClassLoader and Application ClassLoader.Out of these you have the BootStrapClassLoader Developed in C++/C(You can check the code).
BootStrap Class Loader is basically developed for all platforms as it will load the rt.jar the basic java classes.So all the OS have different implementaion of this class loader.Rest all is developed in the Java.
Now comming to your query I would like you to check the JAVA_HOME/include directory where you can find win32 and some *.h files which are basically should be the implementation of your JVM.I am talking about the hotspot JVM.
So with the download of hotspot for windows you have source code also embeded in that.
Hope this helps you
regards
Vicky

I want jvm source code

Jvm I want all the source code, who can help me?
Thank you

Go to [http://openjdk.java.net/|http://openjdk.java.net/]
See "Source Code" on left nav bar
Select how you want to access the source.
-Roger

How to read the Java source code (in Netbeans)

I use OS X10.5.5, NetBeans 6.1 and JSE 6 on a 64 bit mac.
When I downloaded NB6.1 it had JSE 5 as it's default (and only) java platform. I ran Software Update to get Java 6 from Apple, used the Java Prefrences utitlity to set JSE6 as default. In NB I added the JDK6 platform, registered the JDK6 javadocs and noticed that I also have the option of registering the Java source code.
I have three questions:
1) How do I make JDK6 the default in NetBeans. The JDK5 keeps being default after I did the steps above and I don't see anywhere to change that.
2) How do I read the Java 6 source code? I can see sun provides [source code| http://download.java.net/jdk6/] for their supported platforms. I dont see Apple doing the same for its JDK port. What would I need to do to get to read the java SE6 sources? or is it actually hiding somewhere in the /System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Home hierarchy?
3) Where does the JVM look for the binary code to run when I make a call to, say java.util.ArrayList or any other library. In my naivety I would have assumed it would be a .class file somewhere in the java Home folder, but I don't see anything like it.
thanks in advance,
chris

This is taken from the help included with netbeans. In response to question 1.
By default, the IDE uses the version of the Java SE platform (JDK) with which the IDE runs as the default Java platform
for compilation, execution, and debugging. You can view your IDE's JDK version by choosing Help > About and clicking the
Detail tab. The JDK version is listed in the Java field.
You can run the IDE with a different JDK version by starting the IDE with the --jdkhome jdk-home-dir switch on the command line
or in your IDE-HOME/etc/netbeans.conf file. For more information, see IDE Startup Parameters.
In the IDE, you can register multiple Java platforms and attach Javadoc and source code to each platform. For example, if you
want to work with the new features introduced in JDK 5.0, you would either run the IDE on JDK 5.0 or register JDK 5.0 as a
platform and attach the source code and Javadoc to the platform.
In , you can switch the target JDK in the Project Properties dialog box. In , you have to set the target JDK in the Ant script itself,
then specify the source/binary format in the Project Properties dialog box.
To register a new Java platform:
Choose Tools > Java Platforms from the main window.
Click New Platform and select the directory that contains the Java platform. Java platform directories are marked with a
in the file chooser.
Use the Sources and Javadoc tabs to attach Javadoc documentation and source code for debugging to the platform.
Click Close.
To set the default Java platform for a standard project:
Right-click the project's root node in the Projects window and choose Properties.
In the Project Properties dialog box, select the Libraries node in the left pane.
Choose the desired Java platform in the Java Platform combo box.
Switching the target JDK for a standard project does the following:
Offers the new target JDK's classes for code completion.
If available, displays the target JDK's source code and Javadoc documentation.
Uses the target JDK's executables (javac and java) to compile and execute your application.
Compiles your source code against the target JDK's libraries.
If you want to register additional Java platforms with the IDE, you can do so by clicking the Manage Platforms button.
Then click the Add Platform button and navigate to the desired platform.
To set the target Java platform for a free-form project:
In your Ant script, set the target JDK as desired in the javac, java, and javadoc tasks.
Right-click the project's root node in the Projects window and choose Properties.
In the Sources panel, set the level of JDK you want your application to be run on in the Source/Binary Format combo box.
When you access Javadoc or source code for JDK classes, the IDE searches the Java platforms registered in the
Java Platform Manager for a platform with a matching version number. If no matching platform is found, the IDE's default platform is used instead.
See Also
Managing the Classpath
Declaring the Classpath in a Free-Form Project
Stepping Through Your Program
Legal Notices

Problem with registering Parser - Recompiled source code, don't see any changes

I had created a parser. I had register this parser with Ifs Manager. I had execute this following statement to see if been registered carefully:
On user ifssys/ifssys
sql)select name,stringvalue,bundle from odmv_property where name= 'p01';
I see my parser....
select name from odmv_propertybundle where id=1139;
ParserLookupByFileExtension
All it's ok. I upload a file with a 'p01' extension with option 'parser' on my Internet Explorer. All work fine.. My parser work. But I need to do some changes in my code. I update my code, recompile my code. My class file have been updated. After my parser (.class) file have been updated I upload a new file with parse option. I don't see any change I do in my code. Why??? How I can update my parser to view change. I have only recompile my code an place my new class files on the same directory. I have try again (change on code, recompile, test) and I don't see any changes.
But I have test by change my classname. My classname before is Test1 and I have rename my classe by Test2. I have compiled this code and a file Test2.class have been generate. I have update my register parser with Ifs Manager to use the new classname Test2. I have chack with sql statement to see if my parser have been updated. I have been updated correctly. I have upload a new file with parse option and I see my change on my code..
Do you have some explanations about that??
How I can update my source code of a parser already registered to the parser take the change I do.
Francois
null

Ok, but they have another manner to resolve this problem. If I upload a file with parser option on Windows Nt explorer (Using SmbServer or WcpServer). How I can update the class file into the JVM? I need the restart this those server or just one? If just one which server I need to restart?
Thanks Francois
null

J2SE 5.0 Source code

Could someone please tell me when it's the source code for J2SE 5.0 going to be available under the Sun Community Source Licensing page: http://wwws.sun.com/software/communitysource/j2se/java2/download.html?
Thanks

I was going to say the same thing. It is a FCS release: First Customer Shipment.
I am looking for the jvm source code and other things. src.zip contains almost all the JAVA runtime source code (java source code), however there are some reference implementations whose source code is not in src.zip (for instance the RI for jcp 114: http://www.jcp.org/en/jsr/detail?id=114 ).

Help me in finding the entry points in the source code of java.....

hi...
I want to design a compilation server and apply some of the optimization technique's like inlining, SSA and others.
So i require to find the entry points in source code from where i can include my code and check the performance of the program at level it is performing .
Please help in this problem....
and i also like to know what are hot methods in java context?

BigDaddyLoveHandles wrote:
Do you even know Java? Why not just let the HotSpot optimization do its thing?Good point, I would try either of two things.
If you have a good understanding of Java internals and are confident you could optimise code better, I suggest you contribute to the OpenJDK and we can all benefit.
Otherwise I suggest you try using the optimisation built into the compiler and the JVM.
Note: the JVM optimises the code dramatically in ways most normal people won't have thought possible.
The compiler doesn't optimise the code so much as it leaves this job to the JVM.
Two examples;
- say you call a small method often. The JVM can inline this method for you. (the same way a compiler would) However say this method can be over-ridden and later your program calls a different implementation, it can inline both methods even if the new method in a new class didn't exist when the first method was inlined.
- In a 32-bit JVM, 32-bit registers and references are used. In a 64-bit JVM 64-bit registers and references are used without needing to recompile the code. However there is a third option of using 32-bit references in a 64-bit JVM. In this case, it assumes the bottom 3 bits are always 000 so it shifts the reference down 3 bits allowing you to access 32 GB using 32-bit references. Again, you can use this with libraries which were compiled before 64-bit JVMs were available.

Needed: A bit more info on the source code structure

Hi,
I've downloaded the source code zip file and would like to link to BlazeDS's source code from a Flex Builder project, so that I can step through it in the debugger.
As far as I can see the source code is split up in multiple sub-directories under the modules directory. It would be nice if there was a single folder that included all BlazeDS source, so that I wouldn't have to link to multiple folders in my project.
Or, at least, some explanation in a read-me file explaining what I need to link to.
Am I missing something? If so, where?
Also, an explanation of the difference between 'java' and 'java15' folders would be helpful.
Thanks,
Douglas

> Could you explain to me why flex.messaging.MessageBroker only exists in
> /core/src/java/ and not in /core/src/java15/?
Hi Douglas,
The classes are merged together in to a single jar file. The java15 code is
mainly code that needs to be compiled with the compiler in 1.5 mode. This
is left over from before we released BlazeDS and supported Java 1.4. We
expect to 'fix' all this moving forward and require Java 5 SDK and JVM as a
minimum. We just haven't done that yet.
In an IDE you can just ignore this and set the JVM level to be 1.5 and
include both the java and java15 directories as source. The Eclipse
projects (and IntelliJ IDEA projects) we provide should already take care of
this for you. It shouldn't be too hard to do in any other Java IDE either.
Tom Jordahl
Adobe

HotSpot source code explanation

Hi!!
I am new in this, so I will try to be as clear as I am able :)
I need to modify the source code of the hotspot, and I do not find any information about the meaning of each file in the directory tree. I have tried to do it by myself, but it is a bit complicated for me ;P
Any suggestion, WP, idea or anything about the meaning or the content of each file (as many as you can) will be of a huge help :D:D:D
Thx!! :D:D:D:D

Hi!!!
I am doing a project about improving certains features in the JVM ;) so I need to modify the source code of the hotspot :)
Thx!! :D

Attaching source code of jar files in ecllipse edidor

Hi all,
i want to attach source code for jre system library 1.5 while i am using ecllipse 3.2. i also want to attach other source code for struts.jar .
but i am unable to do it.
my another problem is that i have struts.jar 1.2.9 and source code for that version is not available on the apache site.
so please help me to attaching source file with jar files.
thanks.

source code for jre system library 1.5 under eclipse: Window -> Preferences ->
Installed JREs -> here add JDK and not JRE
(that's all !!)
source code for struts.jardownload struts.xxx-src.zip from struts web site the
add it to your struts project repository. Write some
code that uses the struts API then select a struts
class (ActionForm for example) and hit F3 keyboard
key. Finally, click the button Attach
Source... and select struts.xxx-src.zip you've
just downloaded.
do the same thing for all other jar which have a
source code
hope that helpsRather than change JVMs to do this, you could just follow java_2006's instructions for the JRE, looking for the source inside the folder where your JDK is installed. It's in a file called src.zip

Xletview: why not use sun's javaTV source code directly ?

xletview : one emulator for viewing MHP Xlets on a PC;
I see many difference from sun's code about the part of javaTV.
Why the author Martin Sveden need to rewrite them and not use sun's javaTV source code directly ?
Thank you for your any answer.
Sorry for my horrible english.

XleView is a fine effort, but it has its limitations. I tried using it for the GunBunny demo available in the JavaME SDK 3.0 Eary Access available in
http://java.sun.com/javame/downloads/sdk30ea.jsp
and I encountered some of thost limitations. What Sveden does it several tricky manipulations in a classloader for the Xlet. In particular, he translates bytecode as he loads the Xlet's classes, changing some class names, such as changing
java.awt.Toolkit
tto
xjava.awt.Toolkit
This works up to a point. This version of Toolkit usually just turns around calls java.awt.Toolkit's corresponding routine, but he deliberately he does not implement the ubiquitous
public Image createImage(URL url)
When I downloaded his source and tried adding ths into his code, I then encountered at runtime
Uncaught error fetching image:
java.lang.NullPointerException
at sun.awt.image.URLImageSource.getConnection(URLImageSource.java:97)
at sun.awt.image.URLImageSource.getDecoder(URLImageSource.java:107)
at sun.awt.image.InputStreamImageSource.doFetch(InputStreamImageSource.java:240)
at sun.awt.image.ImageFetcher.fetchloop(ImageFetcher.java:172)
at sun.awt.image.ImageFetcher.run(ImageFetcher.java:136)
I think that this is some optimization within J2SE where they do not wait for the image to load and do the fetching in a separate thread. I do not know if there is some way to force the Sun's JVM to disable this optimization and I have not investigated furher, but I did email Svenden. I noticed that the current version of XleTView is 0.3.6 which is dated June 2004 and the web site http://www.xletview.org/ has had not news since 2005 .
I note that Svenden provides an elegant user interface but I advise you not try to learn the API's from his classes: he makes no effort to keep his implementation separate from the API standards so, for instance, his version of HScene is
package org.havi.ui;
public class HScene extends Container
implements HComponentOrdering, ImageObserver, MenuContainer, Serializable {
whereas the real standard is
public class HScene extends Container
implements HComponentOrdering {
I hate to critize such a fine effort, but it is best to keep an imlementation separate from the public API.
I agree that having a lightweight, simple and Java feature-complete Xlet viewer running would be very helpful, especially if BD-J gains much popularity. I have found trying to work with the vendor players described at
http://wiki.java.net/bin/view/Mobileandembedded/Blu-RayDiscHelloWorld
to be frustrating. I tried all four mentioned and I have gotten none of them to work for me yet. These are huge downloads and the "Intro Version" of Arcsoft pointed to at the SDK 3.0 Early Access page
http://www.arcsoft.com/products/totalmediatheatre/
just gives a "File not found" HTML page. This forum post mentions that perhaps it was recently taken down?
http://www.arcsoft.com/forum/forum_posts.asp?TID=1084
I have already emailed Michael Downs of Arcsoft since he is mentioned here:
http://wiki.java.net/bin/view/Mobileandembedded/BDJPCPlayers
What did work for me was to take Sun's JavaTV 1.1 Reference Implementation and PowerDVD's BDJ.jar and hack/fix a few classes to get GunBunny to work within the RI's RunXlet program. This is not trivial but I will will describe:
Download the JavaME 3.0 SDK EA and then download the correct version of PowerDVD that the SDK page points to:
http://www.brothersoft.com/powerdvd-download-50794.html
Download the RI binary and source of Java TV API 1.1
http://java.sun.com/javame/technology/javatv/index.jsp
Since I am too lazy to use anything but the latest 1.6 JRE as a runtime, I have to fix
com.sun.tv.media.util.MediaThread
to comment out its stop() method. This is becase stop() was deprecated and made final in J2SE 1.5
http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Thread.html#stop()
http://java.sun.com/j2se/1.5.0/docs/guide/misc/threadPrimitiveDeprecation.html
Next, I had to mae a change to Sun's JavaTV implementation to keep the GunBunny demo happy by providing a ServiceContext. The RunXlet program calls SIEmulator, but that environment does not provide a ServiceContex, so I added one back in:
com.sun.tv.receiver.SIEmulator
private static ServiceContext svcctx = null;
Add before every call to new AppSignalEvent() and add the svcctx as the second-to-last argument:
if(svcctx == null){ try { svcctx = new com.sun.tv.ServiceContextImpl(); }catch (Exception e){ e.printStackTrace(); } }
I then had to hack a few PowerDVD classes, which is evil of me. First, I had to build an empty class by the name of
sun.util.BDJPlugin
becuase some PowerDVD class extends it but it is not in its BDJ.jar and then I had to reverse-compile (evil!) and modify one of their internal classes to avoid a dependency on their native methods. What I ended up with was a hacked version of com.cl.bdj.helper.CUtil to avoid the native methods which access the registry where they query for registry settings but also provide a default value (which I return).
com.cl.bdj.helper.CUtil
private static String pGetRegistryString(long i ,String string ,String string3) {
return string3;
private static int pGetRegistryInt(long i ,String string ,int j) {
return j;
The last thing I had to do was to change com.hdccookbook.gunbunny.BaseXlet, to use the JavaTV container rather than the org.havi one:
import javax.tv.graphics.TVContainer;
import java.awt.Container;
change
// protected HScene scene;
protected Container scene;
public final void run() {
// waitForPresenting();
// scene = HSceneFactory.getInstance().getDefaultHScene();
scene = TVContainer.getRootContainer(xletContext);
In order to having working keys, I had to add the KeyListener interface to BaseXet and
run(){
addKeyListener(this);
and then add a near duplicate of the org.dvb.event.UserEvent* stuff that is already there:
public void keyPressed(KeyEvent e){
switch(e.getKeyCode()){
case KeyEvent.VK_0:
case KeyEvent.VK_1:
case KeyEvent.VK_2:
case KeyEvent.VK_3:
case KeyEvent.VK_4:
case KeyEvent.VK_5:
case KeyEvent.VK_6:
case KeyEvent.VK_7:
case KeyEvent.VK_8:
case KeyEvent.VK_9:
numberKeyPressed(e.getKeyCode() - KeyEvent.VK_0);
break;
case KeyEvent.VK_ENTER:
enterKeyPressed();
break;
case KeyEvent.VK_LEFT:
arrowLeftKeyPressed();
break;
case KeyEvent.VK_RIGHT:
arrowRightPressed();
break;
case KeyEvent.VK_UP:
arrowUpPressed();
break;
case KeyEvent.VK_DOWN:
arrowDownPressed();
break;
public void keyReleased(KeyEvent e){
// System.out.println("Released: e="+e+" code="+e.getKeyCode());
public void keyTyped(KeyEvent e) {
// System.out.println("Typed: e="+e+" code="+e.getKeyCode());
It then comes up and functions, but the rendering is not very good. Again, this is complete hack. Running the Java TV 1.1 RI in a JRE 1.6 is not supported. If you try to run any of the other examples, you will discover that the XML parsing is broken in JRE 1.6 with this message:
Parsing failed: com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequence
Exception: Invalid byte 1 of 1-byte UTF-8 sequence., file: lib\JavaTVSampleFile01.xml
and you have to go and change the lines in
lib\JavaTV.properties
from
ServiceFileHandler=com.sun.tv.receiver.ReceiverFile
# ServiceFileHandler=SampleData_01
to
# ServiceFileHandler=com.sun.tv.receiver.ReceiverFile
ServiceFileHandler=SampleData_01
and build samples\db\SampleData_01.java and put it in your classpath along with all these other hacks.
Nonetheless, if you want to develop a somewhat generic Xlet that uses some BD-J features, that is how you might do it. But the moment you exercise anything else in the vendor's BDJ.jar that simply doe snot work outside of their environment or invokes one of their native methods, you are again stuck.
It would be nice if Sun would at least bother to update the JavaTV RI with the fixes I hae mentioned. Their "jmflite" implementation does not render perfecly but at least it would give the programmer something to work with without having to deal with an older JRE, etc.
Andrew
Edited by: AndrewMorrow on Oct 20, 2008 2:48 AM

Where can I get jdk1.0 source code?

I wanna make a jvm myself.
Where can I get jdk1.0 source code?
Thanks!

Why do you want jdk 1.0? Why not the latest JDK 1.3.1?

Java 1.5.0_05 source code?

Does anyone know where I can find the source code for Java 1.5.0_05? I did find one promising location, but the source was packaged in ways that could only be expanded on Windows and Solaris, not on Mac OS X (the OS I'm running.)
Thanks.

Which source are you after? Just the API, or the JVM. The API should be in a file called "src.zip" in the JDK install folder.The API, but the problem is in getting a "JDK install folder" to look in. The newest sources from Sun (JDK 1.5.0_09, I believe) comes in a format I can decompress on Mac, but the archived ones are in native Windows and Solaris formats that I can't get to.
You're right in that Java for Mac is developed by Apple, but I had assumed that the source for the core "java", "javax", etc. packages stayed the same. Perhaps that's not true?
Anyway, I'll see if I can get it from Apple.
Thanks.

JVM 1.4.2 source code ?

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