Execution problem with java.exe

Hi everybody. I am a student in a belgian university, and i've got a problem with the execution of my binaries in the JVM.
I'm developping my project with Eclipse. When I build the project, Eclipse launch perfectly my application with javaw.exe (I supposed it because it's written in the console when I run the project).
Thus, I wanted to try to launch my application by myself, to check if everything is right...
My project is composed like this :
- creavea/src : the sources of my project (a package called "main" , and a package "com.creavea. ..." and other .jar files like a MySQLConnector/J, edtFTPj, the JOutlookBar by lf2prod, ...
- creavea/bin : Eclipse puts the binaries there, when I run my project.
- creavea/files : Somes files like configuration files for my application, etc ...
- creavea/images : Images for my interface.
- the main class, containing the pubilc static void main method, is called CreaGesta, and is in the "main" package.
creavea is the name of my project, but i think you supposed it !
I want to run the binaries, then i do this :
- I open a ms-dos console
- I'm going in the C:\eclipse\workspace\creavea\bin folder
- I execute the command : java main.CreaGesta ...
And it doesn't work :'( ! An error appears :
Exception in thread "main" java.lang.NoClassDefFoundError : com/lf2prod/common/swing/JOutlookBar.
This class, JOutlookBar is used by my application, and the jar file containing the class is in my /bin folder. I can't understand, i'm a little bit disapointed.
It's my first big project in Java, then i don't really understand what's happening. So if someone can help me, it will be really nice for me ! Thanks a lot for your help !
J�r�me - Belgium

Thank you for your reply Atmguy ! I put in my command the classpath of the jar's who are in my /bin folder.
Like this : java -classpath edtftpj-1.4.9.jar; jdom.jar;l2fprod-common-outlookbar.jar;mysql-connector-java-3.1.8-bin.jar main.CreaGesta But now, i've got an other error message :
Exception in thread "main" java.lang.NoClassDefFoundError : main/CreaGestaOh, it changed ! but I don't understand the problem . What does it mean? "Java cannot find the class main/CreaGesta", or "An error occured in main.CreaGesta" ?
Can somebody help me to solve this new error ? Thank you !

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    i use mozilla and now with the problems with java and hackers cannot play my pogo games,what can i do? i disabled my java i tried java 6 doesnt work or is not safe,what is a safe way to play games on pogo that use java?

    Oracle has released a Java 7 Update 11 to address security vulnerabilities and you should update to that version.
    *https://support.mozilla.org/kb/how-to-use-java-if-its-been-blocked
    See also:
    *http://kb.mozillazine.org/Java#Windows_installation_issues
    You can find the latest Java version on the Oracle website.
    See Java Platform > Java SE 7U11 and Java 6U38 (Download JRE)
    *http://www.oracle.com/technetwork/java/javase/downloads/index.html

  • Problem with java swing button and loop

    Problem with java swing button and loop
    I�m using VAJ 4.0. and I�m doing normal GUI application. I have next problem.
    I have in the same class two jswing buttons named start (ivjGStart) and stop (ivjGStop) and private static int field named Status where initial value is 0. This buttons should work something like this:
    When I click on start button it must do next:
    Start button must set disenabled and Stop button must set enabled and selected. Field status is set to 1, because this is a condition in next procedure in some loop. And then procedure named IzvajajNeprekinjeno() is invoked.
    And when I click on stop button it must do next:
    Start button must set enabled and selected and Stop button must set disenabled.
    Field status is set to 0.
    This works everything fine without loop �do .. while� inside the procedure IzvajajNeprekinjeno(). But when used this loop the start button all the time stay (like) pressed. And this means that a can�t stop my loop.
    There is java code, so you can get better picture:
    /** start button */
    public void gStart_ActionEvents() {
    try {
    ivjGStart.setEnabled(false);
    ivjGStop.setEnabled(true);
    ivjGStop.setSelected(true);
    getJTextPane1().setText("Program is running ...");
    Status = 1;
    } catch (Exception e) {}
    /** stop button */
    public void gStop_ActionEvents() {
    try {
    ivjGStart.setEnabled(true);
    ivjGStart.setSelected(true);
    ivjGStop.setEnabled(false);
    getJTextPane1().setText("Program is NOT running ...");
    Status = 0;
    } catch (Exception e) {
    /** procedure IzvajajNeprekinjeno() */
    public void IzvajajNeprekinjeno() {  //RunLoop
    try {
    int zamik = 2000; //delay
    do {
    Thread.sleep(zamik);
    PreberiDat(); //procedure
    } while (Status == 1);
    } catch (Exception e) {
    So, I'm asking what I have to do, that start button will not all the time stay pressed? Or some other aspect of solving this problem.
    Any help will be appreciated.
    Best regards,
    Tomi

    This is a multi thread problem. When you start the gui, it is running in one thread. Lets call that GUI_Thread so we know what we are talking about.
    Since java is task-based this will happen if you do like this:
    1. Button "Start" is pressed. Thread running: GUI_Thread
    2. Event gStart_ActionEvents() called. Thread running: GUI_Thread
    3. Method IzvajajNeprekinjeno() called. Thread running: GUI_Thread
    4. Sleep in method IzvajajNeprekinjeno() on thread GUI_Thread
    5. Call PreberiDat(). Thread running: GUI_Thread
    6. Check status. If == 1, go tho 4. Thread running: GUI_Thread.
    Since the method IzvajajNeprekinjeno() (what does that mean?) and the GUI is running in the same thread and the event that the Start button has thrown isn't done yet, the program will go on in the IzvajajNeprekinjeno() method forever and never let you press the Stop-button.
    What you have to do is do put either the GUI in a thread of its own or start a new thread that will do the task of the IzvajajNeprekinjeno() method.
    http://java.sun.com/docs/books/tutorial/uiswing/index.html
    This tutorial explains how to build a multi threaded gui.
    /Lime

  • I have a problem with Java and an e-procurement system integrating

    I use an e-procurement system at work and yesterday I could not get my parts list from the suppliers web site to display in our in-house eprocurment finance package.
    There is not a problem with the finance package. There is not a problem with the suppliers web site. I have verified both of these by other colleagues being able to complete what I am trying to do.
    The difference between my version of Firefox and my colleagues' is that I am on version 6.0.1 and they are on 6.0.
    I have had problems with Java not displaying certain animations on the suppliers web site but, my colleague does not and I am suspicious that this is the problem. Can anyone verify this please and what can I do about it. My Java updates are up-to-date as of yesterday and are automatic.
    Thanks.

    I was quite amazed I never got a reply to this, in the past people here have been helpful. In any case I was finally able to enter this website on the exceptions list in the Java panel, and I believe it is okay  now.

  • Problem with Java after Software Update to 10.5.7

    Hi,
    I am facing problem with Java after having run Software upgrades.
    Here is the whole story. I recently moved to iMac 10.5.6 from PowerPc 10.4. On this new machine I was having problem running a 3rd party application, which requires JVM. As this application worked well on Tiger, I decided to upgrade JVM on my iMAC using Software Upgrade(was I insane!!). As I like my systems to be updated (as with linux on my personal machine) I clicked "install all". As a result I have the following upgrades run on my machine:
    2009-05-20 13:12:01 +0200: Installed "Mac OS X Update Combined" (10.5.7)
    2009-05-20 13:12:10 +0200: Installed "Remote Desktop Client Update" (3.2.2)
    2009-05-20 13:12:26 +0200: Installed "Java For Mac OS X 10.5 Update 2" (1.0)
    2009-05-20 13:58:36 +0200: Installed "Java for Mac OS X 10.5 Update 3" (1.0)
    2009-05-20 13:58:44 +0200: Installed "AirPort Utility Software Update 2009-001" (5.4.1)
    2009-05-20 13:59:07 +0200: Installed "QuickTime" (7.6)
    2009-05-20 13:59:22 +0200: Installed "iPhoto Update" (7.1.5)
    2009-05-20 13:59:28 +0200: Installed "iLife Support" (9.0.2)
    2009-05-20 13:59:38 +0200: Installed "iDVD Update" (7.0.3)
    2009-05-20 13:59:58 +0200: Installed "iTunes" (8.1.1)
    But now, simply running $java on the prompt hangs, i.e. it takes no action.
    $ which java
    /usr/bin/java
    $ ls -ltr /usr/bin/java
    May 20 15:09 /usr/bin/java -> /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java
    $java (no response)
    Here is the output of $ top
    PID COMMAND %CPU TIME #TH #PRTS #MREGS RPRVT RSHRD RSIZE VSIZE
    703 java 98.8% 0:38.54 3 110 72 480K 184K 1964K 40M
    Any clues?
    Details of JavaVM on my machine
    $ pwd
    /System/Library/Frameworks/JavaVM.framework/Versions
    $ ls -ltr
    total 56
    drwxr-xr-x 3 root wheel 102 Dec 2 2007 1.3.1
    lrwxr-xr-x 1 root wheel 3 Aug 31 2008 1.4.1 -> 1.4
    drwxr-xr-x 8 root wheel 272 Aug 31 2008 1.4.2
    drwxr-xr-x 8 root wheel 272 Aug 31 2008 1.5.0
    lrwxr-xr-x 1 root wheel 5 May 20 13:12 1.3 -> 1.3.1
    lrwxr-xr-x 1 root wheel 5 May 20 13:12 1.4 -> 1.4.2
    lrwxr-xr-x 1 root wheel 5 May 20 13:12 1.5 -> 1.5.0
    drwxr-xr-x 8 root wheel 272 May 20 13:12 1.6.0
    lrwxr-xr-x 1 root wheel 5 May 20 13:12 1.6 -> 1.6.0
    drwxr-xr-x 8 root wheel 272 May 20 13:12 A
    lrwxr-xr-x 1 root wheel 1 May 20 14:57 Current -> A
    lrwxr-xr-x 1 root wheel 3 May 20 14:59 CurrentJDK -> 1.5
    Any suggestions? Is there a cleaner approach to uninstall Java on Mac then a simpl "move to thrash"!
    cheers

    Hi,
    I am facing problem with Java after having run Software upgrades.
    Here is the whole story. I recently moved to iMac 10.5.6 from PowerPc 10.4. On this new machine I was having problem running a 3rd party application, which requires JVM. As this application worked well on Tiger, I decided to upgrade JVM on my iMAC using Software Upgrade(was I insane!!). As I like my systems to be updated (as with linux on my personal machine) I clicked "install all". As a result I have the following upgrades run on my machine:
    2009-05-20 13:12:01 +0200: Installed "Mac OS X Update Combined" (10.5.7)
    2009-05-20 13:12:10 +0200: Installed "Remote Desktop Client Update" (3.2.2)
    2009-05-20 13:12:26 +0200: Installed "Java For Mac OS X 10.5 Update 2" (1.0)
    2009-05-20 13:58:36 +0200: Installed "Java for Mac OS X 10.5 Update 3" (1.0)
    2009-05-20 13:58:44 +0200: Installed "AirPort Utility Software Update 2009-001" (5.4.1)
    2009-05-20 13:59:07 +0200: Installed "QuickTime" (7.6)
    2009-05-20 13:59:22 +0200: Installed "iPhoto Update" (7.1.5)
    2009-05-20 13:59:28 +0200: Installed "iLife Support" (9.0.2)
    2009-05-20 13:59:38 +0200: Installed "iDVD Update" (7.0.3)
    2009-05-20 13:59:58 +0200: Installed "iTunes" (8.1.1)
    But now, simply running $java on the prompt hangs, i.e. it takes no action.
    $ which java
    /usr/bin/java
    $ ls -ltr /usr/bin/java
    May 20 15:09 /usr/bin/java -> /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java
    $java (no response)
    Here is the output of $ top
    PID COMMAND %CPU TIME #TH #PRTS #MREGS RPRVT RSHRD RSIZE VSIZE
    703 java 98.8% 0:38.54 3 110 72 480K 184K 1964K 40M
    Any clues?
    Details of JavaVM on my machine
    $ pwd
    /System/Library/Frameworks/JavaVM.framework/Versions
    $ ls -ltr
    total 56
    drwxr-xr-x 3 root wheel 102 Dec 2 2007 1.3.1
    lrwxr-xr-x 1 root wheel 3 Aug 31 2008 1.4.1 -> 1.4
    drwxr-xr-x 8 root wheel 272 Aug 31 2008 1.4.2
    drwxr-xr-x 8 root wheel 272 Aug 31 2008 1.5.0
    lrwxr-xr-x 1 root wheel 5 May 20 13:12 1.3 -> 1.3.1
    lrwxr-xr-x 1 root wheel 5 May 20 13:12 1.4 -> 1.4.2
    lrwxr-xr-x 1 root wheel 5 May 20 13:12 1.5 -> 1.5.0
    drwxr-xr-x 8 root wheel 272 May 20 13:12 1.6.0
    lrwxr-xr-x 1 root wheel 5 May 20 13:12 1.6 -> 1.6.0
    drwxr-xr-x 8 root wheel 272 May 20 13:12 A
    lrwxr-xr-x 1 root wheel 1 May 20 14:57 Current -> A
    lrwxr-xr-x 1 root wheel 3 May 20 14:59 CurrentJDK -> 1.5
    Any suggestions? Is there a cleaner approach to uninstall Java on Mac then a simpl "move to thrash"!
    cheers

  • Problem with Java after System Upgrade to 10.5.7

    Hi,
    I am facing problem with Java after having run Software upgrades.
    Here is the whole story. I recently moved to iMac 10.5.6 from PowerPc 10.4. On this new machine I was having problem running a 3rd party application, which requires JVM. As this application worked well on Tiger, I decided to upgrade JVM on my iMAC using Software Upgrade(was I insane!!). As I like my systems to be updated (as with linux on my personal machine) I clicked "install all". As a result I have the following upgrades run on my machine:
    2009-05-20 13:12:01 +0200: Installed "Mac OS X Update Combined" (10.5.7)
    2009-05-20 13:12:10 +0200: Installed "Remote Desktop Client Update" (3.2.2)
    2009-05-20 13:12:26 +0200: Installed "Java For Mac OS X 10.5 Update 2" (1.0)
    2009-05-20 13:58:36 +0200: Installed "Java for Mac OS X 10.5 Update 3" (1.0)
    2009-05-20 13:58:44 +0200: Installed "AirPort Utility Software Update 2009-001" (5.4.1)
    2009-05-20 13:59:07 +0200: Installed "QuickTime" (7.6)
    2009-05-20 13:59:22 +0200: Installed "iPhoto Update" (7.1.5)
    2009-05-20 13:59:28 +0200: Installed "iLife Support" (9.0.2)
    2009-05-20 13:59:38 +0200: Installed "iDVD Update" (7.0.3)
    2009-05-20 13:59:58 +0200: Installed "iTunes" (8.1.1)
    But now, simply running $ java on the prompt hangs, i.e. it takes no action.
    $ which java
    /usr/bin/java
    $ ls -ltr /usr/bin/java
    May 20 15:09 /usr/bin/java -> /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java
    $java (no response)
    Here is the output of $ top
    PID COMMAND %CPU TIME #TH #PRTS #MREGS RPRVT RSHRD RSIZE VSIZE
    703 java 98.8% 0:38.54 3 110 72 480K 184K 1964K 40M
    Any clues?
    cheers

    Hi man,
    In the wake of this java problem I resorted to keep working on my old machine, and today in my spare time I tried to fix this new machine.
    So I execute $java on prompt, and then try to check the files it has opened, using lsof -p pid
    I see it referring to
    /System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Home/bin/java
    isn't this usually the JAVA_HOME
    However, executing $/System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Home/bin/java
    hangs!!
    but
    $/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Home/bin/java
    works!!
    $ pwd
    /System/Library/Frameworks/JavaVM.framework/Versions/1.6/Home/bin
    $ ./java -version
    java version "1.6.0_07"
    Java(TM) SE Runtime Environment (build 1.6.0_07-b06-153)
    Java HotSpot(TM) 64-Bit Server VM (build 1.6.0_07-b06-57, mixed mode)
    So, I changed the links as follows
    borgraf:Versions raveesh$ l
    total 72
    drwxr-xr-x 3 root wheel 102 Mar 6 2008 1.3.1
    lrwxr-xr-x 1 root wheel 3 May 21 19:42 1.4.1 -> 1.4
    drwxr-xr-x 8 root wheel 272 May 21 19:42 1.6.0
    lrwxr-xr-x 1 root wheel 3 May 21 19:44 OldCurrentJDK -> 1.5
    lrwxr-xr-x 1 root wheel 5 May 21 19:44 1.4 -> 1.4.2
    lrwxr-xr-x 1 root wheel 5 May 21 19:44 1.3 -> 1.3.1
    lrwxr-xr-x 1 root wheel 5 May 21 19:44 1.5 -> 1.5.0
    drwxr-xr-x 8 root wheel 272 May 21 19:44 1.4.2
    drwxr-xr-x 8 root wheel 272 May 21 19:44 1.5.0
    lrwxr-xr-x 1 root wheel 5 May 21 19:44 1.6 -> 1.6.0
    lrwxr-xr-x 1 root wheel 1 May 21 19:44 OldCurrent -> A
    drwxr-xr-x 8 root wheel 272 May 21 19:44 A
    lrwxr-xr-x 1 root wheel 3 Jun 4 17:14 CurrentJDK -> 1.6
    lrwxr-xr-x 1 root wheel 3 Jun 4 17:21 Current -> 1.6
    Linking my Current and CurrentJDK to 1.6 and it works!
    However, shall that be the reason!
    what is in your /Versions/Current/
    I got the following
    $ ls /System/Library/Frameworks/JavaVM.framework/Versions/Current
    CodeResources Frameworks JavaVM
    Commands Headers Resources
    There is no /Home in here, which is usually the case for /1.5 or /1.6
    Anyways, things seems to work for the moment. Lets see if I get problem with using Java.
    thanks

  • A Problem with java

    I have a question with the program.I have write a program that it about polynomial which is in order to desc. But my teacher want me to modify the program to in order to asc. But I don't have any idea with that. Can anyone give me some ideas for this. How can I modify it by easy method? The code is about that,
    public class Polynomial
        private int degree;
        private Node head;
        public static Polynomial addPolys(Polynomial poly1, Polynomial poly2)
            Polynomial polyRes = new Polynomial();
            int power = (poly1.degree > poly2.degree) ? poly1.degree : poly2.degree;
            while (power >= 0)
                Node n1 = poly1.head;
                while (n1 != null)
                    if (n1.power == power)
                        break;
                    n1 = n1.next;
                Node n2 = poly2.head;
                while (n2 != null)
                    if (n2.power == power)
                        break;
                    n2 = n2.next;
                if ((n1 != null) && (n2 != null))
                    polyRes.addNode(n1.coeff + n2.coeff, n1.power);
                else if (n1 != null)
                    polyRes.addNode(n1.coeff, n1.power);
                else if (n2 != null)
                    polyRes.addNode(n2.coeff, n2.power);
                power--;
            return polyRes;       
        public void addNode(int coeff, int power)
            if (head == null)
                head = new Node(coeff, power, null);
                degree = power;
            else
                Node n = head;
                Node last = null;
                while (n != null)
                    if (power > n.power)
                        if (last == null)
                            head = new Node(coeff, power, n);
                        else
                            last.next = new Node(coeff, power, n);
                        degree = power;
                        break;
                    last = n;
                    n = n.next;
                if (n == null)
                    last.next = new Node(coeff, power, null);
        public class Node
            public int coeff;
            public int power;
            public Node next;
            public Node(int coeff, int power, Node next)
                this.coeff = coeff;
                this.power = power;
                this.next = next;
        public String toString()
            StringBuffer strBuf = new StringBuffer();
            Node n = head;
            while (n != null)
                if (n.coeff >= 0)
                    strBuf.append("+ ").append(n.coeff);
                else
                    strBuf.append("- ").append(-(n.coeff));
                if (n.power > 1)
                    strBuf.append("x^").append(n.power);
                else if (n.power == 1)
                    strBuf.append("x");
                strBuf.append("  ");
                n = n.next;
            return strBuf.toString();
    }

    In the future, please use a meaningful subject. "A Problem with Java" contains no information, since by the very fact that you're posting here, it's obvious that you're having a problem with Java. The subject line should give a high level overview of what kind of problem you're having, so people can decide if they're interested and qualified to answer.

  • Problems with java j2re using mozilla

    Hi,
    i'm using j2re1.4.2_05 plugin for mozilla in linux (Fedora Core 2). My internet access goes throught a router (SMC Networks ISDN Barricade SMC7301TA). It's settings can be edited throught a web browser LAN connection. And here the problems begin. On routers settings page a java output console (for error and other messages) is running, which doesn't work, despite java applications on other web pages work well (I tested it on sun's java test page and it's working properly). Java console exits the following errorr message:
    >
    load: class DynamicTable.class not found.
    java.lang.ClassNotFoundException: DynamicTable.class
         at sun.applet.AppletClassLoader.findClass(Unknown Source)
         at java.lang.ClassLoader.loadClass(Unknown Source)
         at sun.applet.AppletClassLoader.loadClass(Unknown Source)
         at java.lang.ClassLoader.loadClass(Unknown Source)
         at sun.applet.AppletClassLoader.loadCode(Unknown Source)
         at sun.applet.AppletPanel.createApplet(Unknown Source)
         at sun.plugin.AppletViewer.createApplet(Unknown Source)
         at sun.applet.AppletPanel.runLoader(Unknown Source)
         at sun.applet.AppletPanel.run(Unknown Source)
         at java.lang.Thread.run(Unknown Source)
    Caused by: java.io.IOException: open HTTP connection failed.
         at sun.applet.AppletClassLoader.getBytes(Unknown Source)
         at sun.applet.AppletClassLoader.access$100(Unknown Source)
         at sun.applet.AppletClassLoader$1.run(Unknown Source)
         at java.security.AccessController.doPrivileged(Native Method)
         ... 10 more
    Is there a way to fix this problem? Cause without the command output it's mearly unpossible to configure the router.

    Yes i can make changes. Not everything is realised with java, just the output console, which reports if the changes i made succeded, prints out logs, gives additional info about some settings etc. So, i can make changes, but i have no response, for example: everytime i save something i don't know if the save was succesful. I can't take a look at IP routing table and DHCP configuration...
    On windows xp, using internet explorer (the default version for xp) everything works perfect. But mozilla for windows has also problems with java. I know i can still change settings on wins, but right now i'm having some problems with networking on linux and i have to set things up in it (besides i use wins only because of school purposes).

  • I have a problem with ( AppleSyncNotifier.exe - Entry Point Not Found ) The procedure entry point sqlite3_wal_checkpoint could not be locate in the dynamic link library SWLite3.dll.

    I have a problem with ( AppleSyncNotifier.exe - Entry Point Not Found ) The procedure entry point sqlite3_wal_checkpoint could not be locate in the dynamic link library SWLite3.dll.

    With Windows Explorer, navigate to your C:\Program Files\Common Files\Apple\Apple Application Support folder.
    Copy the SQLite3.dll that you should find there, navigate to the nearby Mobile Device Support folder, and Paste it in there also.
    Reboot and see if all is well
    In case that your OS is Windows 7 (64 bit)
    1. Open windows explorer, go to location C:\Program Files (x86)\Common Files\Apple\Apple Application Support
    2. Copy file "SQLite3.dll"
    3. Open new windows explorer, to to location C:\Program Files (x86)\Common Files\Apple\Mobile Device Support
    4. Paste file "SQLite3.dll" to the location.
    5. Reboot your computer, it should not display that message, it should be clear.
    Good Luck

  • Problems with Java SE6

    Hi. My system is updated (Mac OS X version 10.6.8) but I can not use Java.
    I have enabled "applet plug-in...." in Java preferences - and have seen this
    message on the Java site:
    Java for Mac
    Check your version of Mac OS X. » How do I find my Mac OS X version?
    Mac OS X Version 10.6 and below
    Use Software Update available on the Apple menu to check that you have the most up-to-date version of Java 6 for your Mac. Java 7 is not supported by these older versions of Mac OS X. If you have problems with Java 6, contact Apple Technical Support. Java.com does not provide a download for these systems.
    Mac OS X Version 10.7.3 (Lion) or newer
    Java 7 can run on your Mac. Java 7 requires an Intel-based Mac running Mac OS X 10.7.3 (Lion) or later and administrator privileges for installation.
    » Information about installing and using Java 7 on Mac
    - so must I contact Apple technical support - Java does not supply download for my system?  Am very confused.
    Hope somebody can help
    jeschaz

    Apple barred Java from running on Macs in order to safeguard users by blocking Java 7 Update 11 and adding it to the banned list in XProtect.
    This was the second time in two weeks that Apple had blocked Oracle's code from running on Macs. The threat was so serious that the U.S. Department of Homeland Security had recommended that all Java 7 users disable or uninstall the software until a patch was issued. This time Java is blocked through Apple's XProtect anti-malware feature.
    Java has come under fire as the means by which hackers have been able to gain control of computers. In April 2012 more than 600,000 Macs were reported to have been infected with a Flashback Trojan horse that was being installed on people's computers with the help of Java exploits. Then in August Macs were again at risk due to a flaw in Java, this time around, there was good news for Mac users: Thanks to changes Apple has made, most of us were safe from the threat.
    Unwilling to leave its customers open to potential threats Apple decided it's safer to block Java entirely.
    In order to block older versions of Flash, Apple has updated its "Xprotect.plist" file so that any versions that come before the current one (version 11.6.602.171) cannot be used on a Mac. Users who have older versions of Flash installed will be greeted with an alert that says "Blocked plug-in," and Safari will prompt the user to update to a newer version.
    Macs running OS X Snow Leopard and beyond are affected.
    UPDATE for those running Lion or Mountain Lion:
    Oracle on Friday February 1 released a new version reportedly addressing vulnerabilities seen with the last build.
    Apple disabled Java 7 through the OS X XProtect anti-malware system, requiring users to have at least version "1.7.0_10-b19" installed on their Macs. The release dated February 1 carries the designation "1.7.0_13-b20," meeting Apple's requirements.
    Oracle "strongly recommends" applying the CPU fixes as soon as possible, saying that the latest Critical Patch Update contains 50 new security fixes across all Jave SE products.
    Update for Snow Leopard users:
    Apple issued update 12 for Java for OS 10.6:
    http://support.apple.com/kb/DL1573
    Note:  On systems that have not already installed Java for Mac OS X 10.6 update 9 or later, this update will configure web browsers to not automatically run Java applets. Java applets may be re-enabled by clicking the region labeled "Inactive plug-in" on a web page. If no applets have been run for an extended period of time, the Java web plug-in will deactivate.
    If, after installing Java for OS X 2013-002 and the latest version of Java 7 from Oracle, you want to disable Java 7 and re-enable the Apple-provided Java SE 6 web plug-in and Web Start functionality, follow these steps:
    http://support.apple.com/kb/HT5559?viewlocale=en_US
    Further update:
    Apple issued this Java related security update No. 13 on February 19:
    http://support.apple.com/kb/HT5666
    and Update No. 14 on March 4:  http://support.apple.com/kb/DL1573
    http://support.apple.com/kb/HT5677
    You should also read this:
    https://support.apple.com/kb/HT5672
    The standard recommendation is for users to turn off Java except when they have to use it on known and trusted websites (like their bank). Javascript, which is unrelated despite the name, can be left on.
    Further useful comment in this article:
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