Is it possible convent .Class file back to .java file? or human readalbe .

Hi there.
i'm just wondering, is it possible convent .Class file back to .java file? or human readalbe chars?

Search for jad decompiler then install into what ever directory you wish.
Its dos base so copy what ever .class into the jad directory then
in command prompt go to the directory with jad, run jad then type
jad -s<java> <filename>.class
It is a very good program

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Trying to compile a .java file from another .java file

Hello,
I'm trying to compile a .java file from another .java file using Runtime.exec...
String c[]=new String[3];
c[0]="cmd.exe"; c[1]="/c" ; c[2]="javac Hello.java";
Process p=Runtime.exec(c);
If anyone can help me in atleast getting the command prompt when Runtime.exec("cmd.exe") is executed...that would be great...I tried out notepad.exe, calc, explorer instead of cmd.exe...all the commands display their respective windows..except cmd.exe...the command prompt doesnt appear...
Please help me ASAP....
Thanks for your help in advance...
Regards.
AKhila.

try this. ur code will be compliled and will get .class file. but console won't appear. is it a must for u?
public class Exec{
     public static void main(String a[]) throws Exception{
          String c[]=new String[3];
          c[0]="cmd.exe"; c[1]="/c" ; c[2]="javac Hello.java";
          Process p=Runtime.getRuntime().exec(c);
          // or Runtime.getRuntime().exec("javac Hello.java");

How do you convert a jar file into a java file, ?

how do you convert a jar file into a java file ?
I am new to Java ,but have a little experience in C++ and Visual Basic.
I want to edit and maybe create my own mobile games that are written or converted into jar files.
At the moment I am using Java NetBeans , and Easy Java( the java pad).
However the only solution I tried was to open the JAR file in winrar and see that its made up of png picture files,
midi music files and class files. Unfortunately when I uncompressed the JAR file , there was NO java file to be seen and the JAVA editors Do not show the class file like a Java file. So why is there no extension Java file in the mobile JAR game ?

801283 wrote:
how do you convert a jar file into a java file ?You generally don't. There exist decompilers, but if you're meant to have the source, you should either have it because you are the author, or you should be able to get it from the author.
I am new to Java ,but have a little experience in C++ and Visual Basic.Does that experience include turning .exe files into C++ code? Because that's the equivalent of what you're asking
I want to edit and maybe create my own mobile games that are written or converted into jar files.Eh?
Are you saying you want to take existing games and modify them? If the creators allow you to modify their source, then they'll provide you with that source (the .java files). If you're allowed to add things but not modify, you don't need .java files. Just documentation, which, again, the creators should be providing.
Or are you saying you want to create your own games and distribute them in jar files? If so, there's no need to turn jars into .java.
However the only solution I tried was to open the JAR file in winrar and see that its made up of png picture files,
midi music files and class files. Unfortunately when I uncompressed the JAR file , there was NO java file to be seen and the JAVA editors Do not show the class file like a Java file. So why is there no extension Java file in the mobile JAR game ?Why would you expect there to be one?

Creating a .bat file to compile .java files

Hi,
I am trying to create a .bat file to compile java files. I have created the .bat in the same folder as teh .java file I am trying to compile. I know the path is set to the proper folder to find the compiler, but I keep getting an error saying the system can not find the specified file, or can not read fileName.java. Everything is spelled correctly, and I know it works because it will compile from the command prompt. Any suggestions?

rather than including a sourcepath, just specify the full location. Using your example, this would read like
javac "C:\Documents and Settings\Kevin\Desktop\School Stuff\AP Comp Sci\PowerPoints\Chapter 02\Executables\Section 2.2\Facts.java"Note that everything is inside the inverted commas " "
I tried this on a hello world Java program inside a brief case and it works fine.
The class file is created inside the briefcase.
If you want to create a bat file to do this from anywhere, modify your batch file to look like this:
c:\
cd "C:\Documents and Settings\Kevin\Desktop\School Stuff\AP Comp Sci\PowerPoints\Chapter 02\Executables\Section 2.2"
javac %1.java
java %1Again, you would use this as follows
mybat FactsDon't forget to leave out the .java extension.
This will compile the java file and attempt to run it for you.
If you don't want it to run, leave out the java%1
If you create other java files in this same briefcase folder you can use mybat to compile them too.
For example
mybat Facts2

How to make a jar file from a java file?

how to make a jar file from a java file, is there any one tht can help me thank you;

You can study this.
http://java.sun.com/docs/books/tutorial/jar/basics/index.html

How to call a html file in a java file

how to call a html file inside a java file ?

Hopeless. Are you by any chance a rare gas? You seem completely inert. LOL You totally pwned him there :rolls eyes:
well, no, I think he's looking for something to this degree:
in HTML, there is a mailto: command that makes the system default handled way to email emails open up. He's looking for a command thats very nice and opens a html file in the system default browser.
So, Dick, Runtime.exec would work execpt that he needs a way to find the default system browser to call exec on, AND he has to know how to pass html file locations to the executable via command line arguments
He just didnt try to phrase it at all :P

Why do I get multiple class files from 1 java file?

I wrote a dialog box using gridBagConstraints and another program RunPanel to run it as a java application. For the first time since playing with java, I get multiple class files from a single java file.
This seems very strange to me and wonder if anyone else has come across this and what could possibly be the reason for it. I did a clean (in Eclipse) just to make sure it wasn't garbage and sure enough they come back again.
I have ReconPanel.java from which I get ReconPanel.class with the addition of ReconPanel$N.class where N goes from 1 to 5.
The same thing in RunPanel but here there is only 1 extra file, RunPanel$1.class.
I'll include the code for RunPanel since it is relatively small:
package ilan;
import javax.swing.JFrame;
public class RunPanel extends JFrame {
     private static final long serialVersionUID = 1L;
     private ReconPanel m_reconPanel = null;
     public RunPanel() {
          super();
          initialize();
      * This method initializes this
     private void initialize() {
        this.setTitle("tester");
        this.setSize(new java.awt.Dimension(138,396));
        this.addWindowListener(new java.awt.event.WindowAdapter() {
             public void windowClosing(java.awt.event.WindowEvent e) {
                  m_reconPanel.exitPanel();
                  System.exit(0);
          m_reconPanel = new ReconPanel();
          this.getContentPane().add(m_reconPanel);
      * @param args
     public static void main(String[] args) {
          JFrame frame1 = new RunPanel();
          frame1.setVisible(true);
} // @jve:decl-index=0:visual-constraint="10,10"The only thing "unusual" I do is to put a listener on the WindowClosing so that I can go back to ReconPanel and write results to the registry.
Can anyone tell me what is going on?
Thanks,
Ilan

He IIan,
Yes, you get number of extra class files based on your number of anomyous class es used. Like in your RunPanel, you get only 1 ..$1.class file, b'coz u have used only 1 annomyous class & i.e WindowAdapter. Take a look at this code :-
this.addWindowListener(new java.awt.event.WindowAdapter() {
             public void windowClosing(java.awt.event.WindowEvent e) {
                  m_reconPanel.exitPanel();
                  System.exit(0);
        });Similarly, in your ReconPanel, you must have used such kind of classes 5 times, & hence u get such 5 extra classes. To avoiod such extra classes, if you can directly implement that interface or extend the class, if possible will be best. For example, for each button, u write
button1.addActionListener(new ActionListener() {
// Code
});Instead, of this, its better to implement ActionListener & write
button1.addActionListener(this);
public void actionPerformed(ActionEvent ae) {
   if (ae.getSource() == button1) {
   // CODE
   }Likethis, you can get rid of such numerous extra class files. In IDE, if you ask to add actionEvent, it will do the first method. To get rid of it, don't add event in the properties, instead, apply the second method. The same thing applies for anyother event. The first option is worthful, if by implementing, u got to write 5 functions from which u r gonna use just 1 method.
Hope this clears your question.
Trupti

EJB Class loader and regular Java files class loader.

Hi,
Is the EJB's class loader the same as a "regular" java files class loader OR weblogic
has 2 class loaders, one for each???
Thanks,
les.

les <[email protected]> wrote:
Hi,
Is the EJB's class loader the same as a "regular" java files class loader OR weblogic
has 2 class loaders, one for each???Yes. Exact classloading architecture depends on which WebLogic version you use. If you
use 6.x+, you may want to read this article:
http://www.onjava.com/pub/a/onjava/2001/07/25/ejb.html
Thanks,
les.--
Dimitri

Class tab when editing .java file

In version 9.x of JDev, when editing a java file, along with 'Source' and 'Design' tabs at the bottom of the editor window, there was a 'Class' tab that let you manage the class' attributes,(methods, attributes...). In 10.1.3.0.3, this tab is missing. Where can one manage getter and setter attributes like previous versions?
mike

Thanks Shay. It seems I have to type in the declaration of the attributes before they show up in the Generate Accessors Dialog. Thsi approach is a big step backward!
What happen to the 'Class' tab??!! Anyone know?
I didn't get a vote on this!
mike

Replacing Class definition comments in java files.

Hi to all,
Im trying to implement a java file replacer that opens about a thousand java files and replaces the first comment lines. That is to say assume that these thousand java files have this comment at the beginning of them:
*Date Author Changes
*${date} ${author} initial release
My application should find these comments and replace them with
* Project Name:
* File: ${file_name}
* Purpose:
* History:
*Date Author Changes
*${date} ${author} initial release
I dont need any GUI. just I will print the changed files to console.
My question is is there any example applications you guys can suggest and should I use XML and XSL to implement this application?
Any suggestions are highly appriciated.
Best Regards.
Metan

How is XML going to help you? Also for a task which you describe its easier to replace it wholesale rather than compare what is present and what is not. If you want to selectively want to remove stuff you might run into issues where you have to compare the name of the file, and you would not even know if the documentation already existing is the right one if you do not replace.
If at all you wish to go with XML it is better with XSL transforms but I guess that would be an overkill for the purpose.
As previously suggested perl is a very good option, or if you have unix operating system you can even try some basic shell scripting to do your job
Thanks

Convert pdf files back to indesign files again

my computer crashed recently so I need to recreate some idesign files from exported pdf files. Is there a program that can import PDF files and make them Indesign files again with all the original componets there and ready to edit? I created many pdf files with Indesign program but lost many original indd files when my computer crashed.

PDF2ID from Recosoft gets fairly good reviews, but don't expect miracles, and you won't get styles because they don't make it into the PDF. I belive Markzware is currently beta testing a plugin as well and you may find information on that on their site.

Loading java file in a java file

Hi everyone,
Sorry this is probably a really simple question, but i'm getting a bit stuck and i can't find anywhere that helps explain how to do it.
I've got two files that represent two questionnaires (questionaire 1 and questionnaire 2), depending on their results to the questions they are given a score of a or b at the end of each questionnaire file. The different combinations of a's and b's result in one of four files needing to loaded (file c, d, e and f). I know i need to use an if statement, but don't know how to execute the loading of the other files.
This means that if the user scores:
questionnaire 1 = a
questionnaire 2 = a
file c needs to be run
questionnaire 1 = a
questionnaire 2 = b
file d needs to be run
questionnaire 1 = b
questionnaire 2 = a
file d needs to be run
questionnaire 1 = b
questionnaire 2 = b
file e needs to be run
Would this be best achieved having one central "control file" that contains a big if statement to achieve this? or should i put both questionnaires in one file? then have the if statement at the bottom of this file and execute the chosen c,d,e,f file when the resuts are generated?
Sorry if i've made this really confusing in the way i've written it!
Any suggestions would be really appreciated!

i don't really know what you're aiming at but what you possibly could do is the "files" that you are talking about, you can extend them with JPanel, and then make one main class which extends JFrame, so you can load the extern panels you've made with an actionlistener, into the main class, but the problem there is that you need to find some way to dispose the current panel first, because else, things can be messed up
OR
instead of working with extern panels, you can just work with one main class with several panels, and display the panels true or false, which will work perfect but i don't know if this is an option for you as you were talking about extern classes

BUG: error rebuilding SQLJ files along other java files with generic

I have done a rebuild on a package containing some SQLJ files, and (consistently) got the following error:
C:\TeleMessage\trunk\src\telemessage\db\impl\dbAdmin.sqlj
    Error(44,18): Java Parsing. Encountered: <
    Expected: <IDENTIFIER> ...; "[" ...; The error at the cursor in the given file is not possible, since there was no '<' there, and besides - if I non-aggresively changed the file, e.g. narrowed imports, changed whitespace or added comments - the error remained in the same location.
I went and done a search using regex in the package, for a line starting with 17 chars followed by a '<'.
I found it in one of the normal JAVA files (not-SQLJ), at line 44 (surprise!) - in a Java 5 generics declaration, e.g. Map<String,Integer>. the 18th character was indeed the '<'.
I'm guessing that the SQLJ translator (accidentally?) parses non-SQLJ files.
If this cannot be fixed, it is really bad - it is one thing that JDeveloper cannot support Java 5 language features because of its dependancy in the SQLJ translator (which is not known to be upgraded until version 11g if at all), but the inability to compile SQLJ files in a project containing other non-SQLJ java files with Java 5 features is hard.
I could only workaround this by rebuilding SQLJ files one at a time!
I also have another type of error, when rebuilding the same project in a higher-level pacakge (root or "Application Sources"):
C:\TeleMessage\trunk\src\dbtools\CallbackNumberFiller.sqlj
    Error(24,8): Missing semicolon.
    Error(24,8): Unbalanced curly braces.Again, the specified file could not be the one to blame - the location of the error is in the middle of the public modified keyword in a method declaration; nothing is neither missing nor unbalanced.
This appears to be different, as it pops in the log near the end of the build process, when the JSPs are being built, specfically during the time the message log fills with "writing <...>" lines (after "translating <...>" and "compiling <...>".
I can consistently reproduce both cases - please advise how I can help you find out what causes this.
Regards,
Yaniv Kunda

First of all, this bug not JDeveloper's problem, but the SQLJ team's.
You can read more posts about this:
Re: BUG: Cannot translate SQLJ files with Java5 generics code
Re: How to use SQLJ with Java 1.4 and 1.5?
Re: SQLJ discontinued??
And if we're at it, this is strange - I can't seem to find the oracle doc you quoted...
SQLJ 11g? The latest release is a part of JPublisher 10.2 available from
http://www.oracle.com/technology/software/tech/java/sqlj_jdbc/index.html
I also didn't find anything on google on 11g, nor about the part number you specified.
Didn't find any Java 1.5 supporting SQLJ translators from other vendors as well.
Do you have any link to this statement?
But if we examine this bug again, the problem involves JDeveloper passing Java 5 featured JAVA files to the SQLJ translator.
Isn't there a way to instruct the translator to use CLASS files compiled by a normal Java 5 compiler, instead of trying to compile the files itself?
Regards,
Yaniv Kunda

How to execute one java file in another java file

Hi All!
I hava a problem.. I need to validate functionality of one java file in my Junit test case.. so, I need to run that java file in my test file..
How should I start with???? Are there any java API's for that.. I checked 'system' ..but which function will suite that functionality,,I am not sure about..

I need to check the functionality of deletetion which
is done by a java class.. Now I need to check this
functionality..whether it is deleting or not... in my
test case.. so, for that I need to execute that java
file in similar manner as how we normally do it...,
in my test case..So let the test case create a file and have your class delete it. What's there to run?

How to run java source files from other java files??

hello all,
i need to run 3 to 4 .java files (first.java,second.java,third.java) from one file.
i tried the
Runtime.getRuntime().exec(cmd); but here cmd must be an exe file.
NOTE THAT i need to run the first.java file ,second.java file each time to generate their .class files(ie I NEED TO COMPILE THEM ALL TIMES AND THEN RUN THEM)
PLZ. help me if this can be done,
warm regards,
Vishal.

One way to do this is to put all your commands into a batch file (this is Windows?) try unix shell otherwise. Anyway here's an example .bat file called cmplrun.bat:
@echo off
javac -classpath . TestCase*.java
java -cp . TestCase01
java -cp . TestCase02
java -cp . TestCase03Then the Java pgm can look like this:
import java.io.*;
public class RunProcess {
public static void main(String[] arg) {
    try {
      Process myProcess;
      myProcess = Runtime.getRuntime().exec("cmd /c cmplrun");
      String s = null;
      DataInputStream in = new DataInputStream(
                           new BufferedInputStream(
                               myProcess.getInputStream()));
      while ((s = in.readLine()) != null) {
        System.out.println(s);
      System.exit(0);
    catch (IOException e) {
      System.out.println("Exception: "+ e);
      System.exit(-1);
}Just one way to do this, all caveats apply and HTH;
~Bill

Is it possible convent .Class file back to .java file? or human readalbe .

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