How to protect java program from hotspot sa

I tried several methods(eg. custom classloader、jvmti) to protected my java program from decompile. They work well until meeting hotspot sa. "Hotspot sa classdump" is so powerf that it can directly dump class from java process's memory in a non invasive debug mode, which make any protect method useless. Is there any way to protect from "hotspot sa classdump"?

There's really no secure way to protect code, in the way that you imagine.
However, your code is most likely not so important that it matters (if it were important, you would already know that it's impossible to give your code away to someone and protect it at the same time).
Of course if you provide your software as a service, the code is never executed by the client and he can't decompile it. Of course not all software can be provided as a service.

Similar Messages

  • How to call  java program from ABAP

    Hi Experts,
         My requirement is to call java programs from ABAP. For that i have set up SAP JCO connection by using this link http://www.sdn.sap.com/irj/scn/weblogs?blog=/pub/wlg/739. [original link is broken] [original link is broken] [original link is broken] Connection gets sucessfully. After this how to call java program from ABAP as per our requirement. Please help me out.
      Also i tried this way also.. but while executing the DOS Command line appear & disappear in few seconds. So couldnt see the JAVA output. Please help me out to call java programs in ABAP..
    DATA:command TYPE string VALUE 'D:Javajdk1.6.0_20 injavac',
    parameter TYPE string VALUE 'D:java MyFirstProgram'.
    CALL METHOD cl_gui_frontend_services=>execute
    EXPORTING
    application = command
    parameter = parameter
    OPERATION = 'OPEN'
    EXCEPTIONS
    cntl_error = 1
    error_no_gui = 2
    bad_parameter = 3
    file_not_found = 4
    path_not_found = 5
    file_extension_unknown = 6
    error_execute_failed = 7
    OTHERS = 8.
    Thanks.

    This depends on the version of your Netweaver Java AS. If you are running 7.0, you will have to use the Jco framework. The Jco framework is deprecated since 7.1 though. If you want to build a RFC server in 7.1 or higher, it is adviced that you set it up through JRA.
    Implement an RFC server in 7.0:
    http://help.sap.com/saphelp_nw04/helpdata/en/6a/82343ecc7f892ee10000000a114084/frameset.htm
    Implement an RFC server in 7.1 or higher:
    http://help.sap.com/saphelp_nwce72/helpdata/en/43/fd063b1f497063e10000000a1553f6/frameset.htm

  • How to run java program from website?

    Hello
    I'd like to know how to run java program from my web page.
    I'd like to push some button in this web page so java program that would be on my server
    would pop-up. Can it be done automaticaly upon running this web site? (without any buttons - I just enter website and program pops up).
    Cheers

    I rather thought about RMI. But I could try servlets. So how it would look like?.
    I would make http request in browser (enter address) and program would show up in its window?. And I would not have to change anything in my program?. This program would run then on both boxes?. One remotely and one not?.
    But I would have to learn some basics, I've never worked with servlets. Could you suggest some good sites about it?. With ready examples so I could tweak them to my purpose.
    Message was edited by:
    macmacmac

  • How to call java program from javascript

    Hi,
    I have an java program which will transform one xml to another xml using XSLT.
    I want to call this java program from Javascript? Is this possible? Please suggest me.
    Thanks,
    Gopal

    is it not possible?
    do i have to refresh the page and read in the values like...
    <%
    String ename = request.getParameter( "EmployeeName");
         session.setAttribute( "ename", ename);
    %>and then call the class from here?
    looking around ive come across ajax but i dont know how to use it and what you need to install and if its compatable with tomcat and jsp?
    is ajax better or not really worth it?
    i have anything up to 100 fields that need saving at one save click

  • How to run java programs from a master java program?

    Hello,
    I have several java programs which run from the command prompt. I am seeking help with code for starting java programs from within a java program. For example, a program called master.java works something like this:
    import java.*;
    create connection pool
    create variables and result sets
    start/run slave1.java (var1, var2);
    start/run slave2.java (var3, var4, var5);
    start/run slave3.java (var1, var4);
    end of program master.java
    Each of the slave.java programs will run for up to an hour. I do not want the master.java program to pause for each slave program to stop. Instead, the master program will keep running and multiple slave programs will be running simultaneously with the master program. When a slave program starts, it is on its own. Also, if possible, I would like to have each of these slave.java programs open in a new separate command window, so I can observe each slave program running in separate windows.
    Any suggestions for code or helpful documentation are greatly appreciated.
    Thank you,
    Logan

    Thank you all.
    At the bottom of master.java I have successfully started a batch file with these lines:
    String jcmd = "cmd.exe /c start c:/data/simulations/MsgViewCount2.bat";
    Process proc = Runtime.getRuntime().exec(jcmd);
    But I still cannot get a java program to start. Here is one variation I have tried:
    String [] cmdArray = new String[2];
    cmdArray[0] = "java";
    cmdArray[1] = "slave1";
    Runtime runtime = Runtime.getRuntime();
    Process process = runtime.exec(cmdArray);
    This compiles, and no errors occur, but nothing happens.
    Regarding this comment:
    Why Runtime.exec? Either make the slaves Runnable or
    just call their main() methods.
    Oh, I see. Sepearate output. :PNone of the slave.java programs have any output.
    Thanks again.

  • URGENT: How to run a Java program from a different directory?

    Hi.
    How do I run a Java program from a directory that the file is not located in? So lets say im in c:\Java. But the file is in c:\Java\abc\efg\.
    What would be the command to run the Java file from c:\Java.
    I can't remember it and I need it asap.
    Cheers.

    If the class you are trying to run is MyApp.class, try
    c:\Java\>java -cp abc\efg MyAppThe actual classpath you specify will depend on whether or not MyApp.class is in a package (I've assumed it isn't) and whether or not any 3rd party jars are involbed (I've assumed not).
    Edited by: pbrockway2 on Apr 1, 2008 6:42 PM
    The command arguments read as "Run the MyApp class using as a classpath abc\efg relative to here (c:\Java)".

  • How to invoke a Java Program from Oracle 10g?(uRGENT)

    Hello.
    I've a query, that i have a program, that basically retreives the records from the
    oracle table and then parser this information and then insert the values in corresponding database base tables. I want that, whenever the new program is inserted, a Trigger should fire and pass the most recently entered record to the Parser Program, means
    1) Firing a Trigge
    2)Storing the most latest data and pass it to the Parser PROGRAM
    Can someone tell me how to do this? How to invoke a Java Program from within the database? Please if anyone has examples provide me. Its very urgent and tell me what is the basic mechanism.
    Thankyou.
    Ben

    With Java Stored Procedures Java may be caleed from a database.
    http://www.oracle.com/technology/tech/java/jsp/index.html

  • Can we run EXE file/ Another Java Program from Java Application? How?

    Can we run EXE file and another java program from java application?
    Thanks in advance

    Example running adobe acrobat
    String command = "C:\\Program Files\\Adobe\\Acrobat 5.0\\Reader\\AcroRd32.exe /t "+selectedDocument+" \\\\CONTROL\\HP LaserJet 4L";
    Runtime rn = Runtime.getRuntime();
    Process process = rn.exec(command);
    process.waitFor();rykk

  • How to execute a Java program from ODI

    Hi All,
    I am new to ODI. I would like to know whether its possible to execute a java program from ODI.
    Reason for this is, I would like to write information in error tables into a file. And after that another program will mail that error log to concerned person.
    Could anyone please help me with this?
    Thank you in advance
    Regards,
    Srini

    if you have the java code then u can create a procedure with Java BeanShell as the Technology and write your java code in the procedure

  • How to call java program by HTML page

    Hi guys,
    I'm new java programer and want to build an HTML page to access to ORACLE database on NT server by JDBC, Can anyone give me a sample?
    I already know how to access database by JDBC, but I don't know how to call java program by HTML page.
    If you have small sample,pls send to me. [email protected], thanks in advance
    Jian

    This code goes with the tutorial from this web page
    http://java.sun.com/docs/books/tutorial/jdbc/basics/applet.html
    good luck.
    * This is a demonstration JDBC applet.
    * It displays some simple standard output from the Coffee database.
    import java.applet.Applet;
    import java.awt.Graphics;
    import java.util.Vector;
    import java.sql.*;
    public class OutputApplet extends Applet implements Runnable {
    private Thread worker;
    private Vector queryResults;
    private String message = "Initializing";
    public synchronized void start() {
         // Every time "start" is called we create a worker thread to
         // re-evaluate the database query.
         if (worker == null) {     
         message = "Connecting to database";
    worker = new Thread(this);
         worker.start();
    * The "run" method is called from the worker thread. Notice that
    * because this method is doing potentially slow databases accesses
    * we avoid making it a synchronized method.
    public void run() {
         String url = "jdbc:mySubprotocol:myDataSource";
         String query = "select COF_NAME, PRICE from COFFEES";
         try {
         Class.forName("myDriver.ClassName");
         } catch(Exception ex) {
         setError("Can't find Database driver class: " + ex);
         return;
         try {
         Vector results = new Vector();
         Connection con = DriverManager.getConnection(url,
                                  "myLogin", "myPassword");
         Statement stmt = con.createStatement();
         ResultSet rs = stmt.executeQuery(query);
         while (rs.next()) {
              String s = rs.getString("COF_NAME");
              float f = rs.getFloat("PRICE");
              String text = s + " " + f;
              results.addElement(text);
         stmt.close();
         con.close();
         setResults(results);
         } catch(SQLException ex) {
         setError("SQLException: " + ex);
    * The "paint" method is called by AWT when it wants us to
    * display our current state on the screen.
    public synchronized void paint(Graphics g) {
         // If there are no results available, display the current message.
         if (queryResults == null) {
         g.drawString(message, 5, 50);
         return;
         // Display the results.
         g.drawString("Prices of coffee per pound: ", 5, 10);
         int y = 30;
         java.util.Enumeration enum = queryResults.elements();
         while (enum.hasMoreElements()) {
         String text = (String)enum.nextElement();
         g.drawString(text, 5, y);
         y = y + 15;
    * This private method is used to record an error message for
    * later display.
    private synchronized void setError(String mess) {
         queryResults = null;     
         message = mess;     
         worker = null;
         // And ask AWT to repaint this applet.
         repaint();
    * This private method is used to record the results of a query, for
    * later display.
    private synchronized void setResults(Vector results) {
         queryResults = results;
         worker = null;
         // And ask AWT to repaint this applet.
         repaint();

  • Not able to execute one Java program from another one via. exec()

    Hi,
    I am new to this forum, so I might be asking a very trivial quetion.
    My program Ap1 is :
    class Ap1
    public static void main(String a[]) throws Exception
    Runtime rt=Runtime.getRuntime();
    Process p=null;
    p=rt.exec("javac,Pr.java");
    Runtime.getRuntime().exec("javac,Pr.java");
    When I run the above program, I get below error at the line 7(bold one):
    D:\batchwe>javac Ap1.java
    D:\batchwe>java Ap1
    Exception in thread "main" java.io.IOException: CreateProcess: javac,Pr.java err
    or=2
    at java.lang.ProcessImpl.create(Native Method)
    at java.lang.ProcessImpl.<init>(ProcessImpl.java:81)
    at java.lang.ProcessImpl.start(ProcessImpl.java:30)
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:451)
    at java.lang.Runtime.exec(Runtime.java:591)
    at java.lang.Runtime.exec(Runtime.java:429)
    at java.lang.Runtime.exec(Runtime.java:326)
    at Ap1.main(Ap1.java:7)
    Path is set as below(which seems correct):
    D:\batchwe>path
    PATH=C:\Program Files\Java\jdk1.5.0_05\bin
    I am just wondering how to call one Java program from another one?!
    Please help.
    thanks
    Rashmi

    Hi diptaPB,
    Thanks for your suggestion.
    Here is how I tried it again, but not getting the desired output:
    Class Pr looks like below -->
    class Pr
    public static void main(String a[])
    System.out.println("hi from process");
    When I run 'Pr' from command prompt, i get the desired output:
    D:\batchwe>java Pr
    hi from process
    However, when I call 'Pr' from another program Ap2.java, it seems that it does not call 'Pr':
    class Ap2
    public static void main(String a[]) throws Exception
    Runtime rt=Runtime.getRuntime();
    Process p=null;
    String[] cmd=new String[2];
    cmd[0]="javac";
    cmd[1]="Pr.java";
    p=rt.exec("cmd");
    D:\batchwe>javac Ap2.java
    D:\batchwe>java Ap2
    ************* no output appears here***********************
    Looking forward for your help.
    regards
    Rashmi

  • Execute a java program from an another program

    Like we can compile a code from wihin a java file by using the following :
    Tool javac = ToolProvider.getSystemJavaCompiler();
    Similarly,can we execute i.e. run a java program from within a java file i.e. running d java command from within the java file ??If yes then please tell me how??

    suppose on the Unix box or from a Unix script ( korn, perl, bourne, bash) you can run the following java program
    java ${JAVA_OPTS} -jar ${GMR_APPS_DIR}/risk.jar -I -c ${COB} -r ${BATCH} -o ${XML_DIR}
    in java you can do the following :
    Runtime rt = Runtime.getRuntime();
              try {
                   Process process = rt.exec("java ${JAVA_OPTS} -jar ${GMR_APPS_DIR}/risk.jar -I -c ${COB} -r ${BATCH} -o ${XML_DIR}
    // OR
                   Process process = rt.exec("/export/apps/Tools/apache-tomcat-5.5.17/bin/startup.sh");
                   // process.destroy(); if you want to kill the process
                   process.waitFor();
                   int RC = process.exitValue();      
                   System.out.println(returnOutput(process.getErrorStream()));
                   System.out.println(returnOutput(process.getInputStream()));
              } catch (Exception ex) {
                   ex.printStackTrace();
    empty the output stream from the script
    private String returnOutput(InputStream is) throws Exception {
                   String s;
                   StringBuffer strBuff = new StringBuffer();
                   BufferedReader br = new BufferedReader(new InputStreamReader(is));
                   while ((s = br.readLine()) != null) {
                        strBuff.append(s);
                   return strBuff.toString();
              }You need to relace the ${} by the appropriate values.
    Regards,
    Alan Mehio
    London, UK
    Edited by: alan_mehio on Jan 16, 2008 4:21 PM

  • How to protect ABAP programs

    Hi experts
             I want to protect my ABAP programs from other users from changing it.
             How to protect my program by setting password or not allowing only display mode like.
             Please suggest me on this.
    Thanks in advance.
    Regards
    Rajaram

    Hi Raja,
    If in case you want to lock the development done by you in SAP,then while the report is open in the ABAP edtor,click on GoTo and then Attributes at the menu bar and then check the checkbox "Editor Lock".
    Nobody will be able to make any changes to your program unless and until logged by your user ID.
    In case you have any further clarifications,do let me know.
    Regards,
    Puneet Jhari.

  • Calling one java program from another

    Hello,
    How can I start another java program from one? Lets
    say I want Second.java to start by calling it from
    First.java. How do I do it? The two programs are given
    below. Any help is appreciated.
    Thanks,
    Amanda
    First.java
    import java.io.*;
    import java.lang.reflect.*;
    public class  First
         public static void main(String[] args)
              Process theProcess=null;
              System.out.println("Hello World from First.java!");
              String second=new String("Second.java");
              //System.load(second);
              //Runtime.getRuntime().load(second);
              try
                   theProcess=Runtime.getRuntime().exec( "Second.java"
                   System.out.println("after exec");
              catch (IOException ioe)
                   System.out.println(">>IOException thrown in
    First.java while calling
    Second.java."+ioe.getMessage());
    Second.java
    public class  Second
         public static void main(String[] args)
              System.out.println("Hello World from Second.java!");
    }

    Thanks, warnerja
    What if Second.java is on a remote machine i.e.
    First.java and second.java are on different machines?
    Will I have to use RMI?Well, you'd have to do some kind of remote invocation. Depends on what kinds of apps house the classes. There are all kinds of ways - web services, servlets, RMI, (maybe others...)
    That's a totally different question than what you originally posted, and would have been very relevant to say so in the first place.

  • How to call Java Pgm from a VB / C / C++ Application???

    Hi,
    I have 3 applications in VB, C, C++ respectively.
    I have a java program which accepts a message id & message description.
    How can i call this java program from my VB, C, C++ applications and pass the parameters.
    Thanks,
    Karthik Narain

    o You could use an exec() call to run it in another process.
    o You could write JNI code to start the JVM and run your program. (Complicated)

Maybe you are looking for