Widely-used object-oriented programming language, emphasizing portability.

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6
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3answers
5k views

How do I run a JAR file without installing Java?

My question may seem odd but this is indeed what I need to do. For the first in the last (maybe) 10 years I have to run a JAR file in my computer. But I don't want to install 'the Java' (and all those ...
6
votes
2answers
36k views

Uninstall Java on Mac OS X?

I'm working on a trouble shooting document for some desktop software that runs in Java. One of the last resort steps is to completely uninstall and reinstall the Java runtime. In Windows XP this can ...
6
votes
1answer
4k views

Switching from Java 1.7 to Java 1.6 in Windows 7

I changed the JAVA_HOME and Path Variable pointing to my Java 1.6 Location from Java 1.7-> tried checking the version using java -version. It showed Java 1.7. Next, tried deleting the Java 1.7 ...
6
votes
2answers
5k views

Microsoft JScript compilation error

For the past month until now, I'm getting the follow dialog from time to time. Probably few times a week. I'm running Windows 7 Ultimate x64 SP1 with all latest updates, and Java 6U29 (1.6.0_29-b11) ...
6
votes
1answer
3k views

Are there any credit cards that run Java? [closed]

When installing Java I noticed credit cards listed among the devices that run Java. Is this true? How do they work?
6
votes
1answer
4k views

Suppressing the “Picked up _JAVA_OPTIONS” message

I'm using _JAVA_OPTIONS to set some defaults for Java on RHEL. It works fine but now every time I start java I get the following message Picked up _JAVA_OPTIONS: -foo -bar -baz is it possible to ...
6
votes
3answers
12k views

How can I set one browser to use JRE 1.5 and another to use JRE 1.6?

I think this has to be a common issue, but I haven't found any clear solution. We have several products that are accessed via a browser (IE 7) with JRE version 1.5. We now need to be able to support ...
6
votes
1answer
7k views

ClassNotFoundException returned for all plugins

I am trying to use a Java applet (any Java Applet), but I always get a messages saying "Error. Click for details". When I do so, the pop-up says: Application Error ClassNotFoundException ...
6
votes
3answers
1k views

Is it possible to preload JVM to make starting of little one-shot java applications faster?

Expected algorithm: You start JVM without actual application (only telling it to load some jars), it loads and listens a socket and waits in a background. When you start the application ...
6
votes
1answer
3k views

Firefox, how to force a specific plugin (i.e. Java) to always load through 'click-to-play'?

After I've updated Java to version 7 update 17 it no longer activates 'click-to-play' when I am browsing to a site that uses Java. I really like to put it back to 'click-to-play' list in light of ...
6
votes
1answer
445 views

Why can't I start Eclipse and Minecraft at the same time?

I'm running Java SE Development Kit Update 25 (64-bit). It appears that I'm unable to run both Eclipse and Minecraft at the same time. This is really really weird, since I can easily start two ...
5
votes
6answers
30k views

MATLab crashes on launch OS X Yosemite

I've just installed the OS X Yosemite beta and can't open MATLab 2014a. It displays this error dialog: Does anyone have any ideas as to how this could be resolved?
5
votes
5answers
21k views

install sun java 6 and sun java 7 side-by-side on linux (fedora 16) using rpm

This is what I would like to achieve, but I'm failing (I'm a newbie in Linux). I have a Fedora 16 box (64 bit) and would like to install multiple versions of oracle java (java 6 and java 7 for the ...
5
votes
2answers
6k views

Find path to current JVM

I need to find the path to the current Java VM running on my Windows machine. How can I do that?
5
votes
2answers
11k views

What applications use Java on a desktop? [closed]

I get the "There's a update for Java" notification on my computer. And as its a security update, I feel like I should get the new update and each time, I need to go through an installation process and ...
5
votes
3answers
60k views

How to disable the Java update message balloon in Windows 7? [duplicate]

I've looked in the Java section of the Control Panel, but don't see an obvious way to disable the automatic message balloon that pop up in Windows 7 asking me to update my version of Java. How do I ...
5
votes
4answers
39k views

How to install java enviroment on Windows 8?

I want to try the newest Windows 8 64-bit. I installed it successfully. I tried to install one trading application called Interactive Brokers Trading Station which requires at least jre-1.4. I went ...
5
votes
3answers
909 views

Was/Is there a version of the Java VM for Windows 3.1?

...And can you still scare up a copy? This came up in a combination of curiosity and technical archeology today, and while there seems to have been one for the Win 3.1.x platform, I can't seem to get ...
5
votes
3answers
15k views

Allowing unsigned Java applications on all sites

Java stopped running unsigned applications one day. Your security settings have blocked an untrusted application from running. The documentation states that I can add a site to an exception ...
5
votes
1answer
1k views

File only visible to cygwin, not windows?

Problem: We have a file created with keytool (from jdk 1.5) that is only visible with the ls command. When we do a dir, it's not there. Specifics: This file is owned by the user, all other files ...
5
votes
2answers
13k views

How to configure applet plugin for OpenJDK in Firefox on Linux?

I am using Kubuntu 10.04 with Firefox 3.6 from Mozilla's website and I use OpenJDK from the Ubuntu repsitories. I want to know how do I configure OpenJDK with the Firefox to view Java applets in the ...
5
votes
1answer
2k views

Why do the fonts in the Java application I'm running look different in Mac OS X than in Windows?

Shouldn't they look exactly the same? Or does Java not have its own fonts? Does it just map font names to OS fonts?
5
votes
2answers
8k views

How do I easily elevate when running a .jar file?

When trying to run an installer Jar file, I am getting an error saying that write access is denied to create a directory under the Program Files folder. Right click -> Run as Administrator is not ...
5
votes
4answers
10k views

Problem with remoted display of java applications

I'm trying to remote display Java based development environments, such as NetBeans and IntelliJ, from a linux machine to a windows machine. When I do this, the right click functionality of the ...
5
votes
3answers
15k views

Will Window RT have a JVM?

Java is supposed to be a way to write portable programs, and one person we work with wrote some of our buisness applications in Java. Doing some prelimiary compatibility checking and it seems that ...
5
votes
1answer
12k views

Running Java 32bit and 64bit on same computer

I ran into a rather puzzling problem, trying to install Vuze 4.2.0.2 on my Windows 7. I have a Java 6 JDK 64bit, but Vuze complains that it can't find a correct 32bit JRE. Yet, as far as I know it ...
5
votes
2answers
6k views

How to add Java System Runtime Parameters?

I'm given the following instructions: You must set the sun.lang.ClassLoader.allowArraySyntax system property to true by adding the following to the JVM arguments: ...
5
votes
1answer
751 views

How to get back to Oracle Java after installing OpenJDK

I've installed Oracle JDK using this guide. Then I accidently installed OpenJDK(tried to prepare PC to build Android). How do I get back to Oracle Java? Can I keep OpenJDK, but set Oracle Java as ...
5
votes
3answers
2k views

java.exe -version and pushd?

I have noticed that when I run the following command Pushd \\RemoteMachine\C$ && java.exe -version I get the java version of the computer I am on. However when I run the pushd command with ...
5
votes
3answers
3k views

Java sound doesn't work under Linux

I just installed Fedora 12 and after downloading and running the Java Sound Demo I get exceptions. If I run just a vanilla Java program that plays a .wav file it runs silently with no sound and no ...
5
votes
3answers
544 views

jEdit slow on Linux

Jedit is a great text editor, and I love that it is truly cross-platform. I usually use it on windows and just recently spent a long while working on some stuff on my linux box and noticed a large ...
5
votes
1answer
902 views

Java in browser: application blocked (multiple domains)

Java made me to update to the latest version and now I get the "Application Blocked" error all the time. Alright, I have lowered the security (although it only allows for the "medium" level, omg), and ...
5
votes
1answer
3k views

How to Kill Java Process in Windows, without killing java.exe through command line?

I need to kill the process activemq-all-5.5.1.jar(....\app-launcher\target\lib\activemq-all-5.5.1.jar). I use taskkill /im java.exe, but it kills all other applications related with java. I need to ...
5
votes
0answers
394 views

Error from egit installation

Just installed a fresh 32 bit copy of java and eclipse. and am now trying to add egit for the first time. Following the instructions here (using the main repositiry) I receive this error when I try ...
5
votes
2answers
14k views

How do I display the Java console?

I'm aware of the fact that you can set it to "show" in the Java control panel, but that's not what I'm asking about. I'm curious about the other options... "Do not start" is pretty straightforward, ...
4
votes
3answers
2k views

Where is Java hiding on my PC?

In my efforts to root out the mysterious Java 1.5.0_11 installation I have hiding somewhere on my PC, I completely uninstalled Java. Now, a search in Explorer turns up nothing, but on the command ...
4
votes
6answers
13k views

Unable to install Android for Windows 7 because JDK is not found

I have JDK SE7u4 installed in windows 7. I tried to install Android on Windows 7 using the installer_r18-windows.exe but no avail. The setup window showed the message saying that the Java SE JDK not ...
4
votes
2answers
12k views

Java 7 update 6 installation fails on Windows 7 when Chrome is default browser

I am configuring a brand new Lenovo U410 system with Windows 7 Home Premium for a user. I received the system direct from the shop. As part of the configuration I installed Java using the online ...
4
votes
2answers
7k views

How to know the JVM path in a Linux system?

I want to copy some files in the subdirectories of the JVM path , java is already installed. How to know the JVM's path ?
4
votes
4answers
6k views

Java not detected by browser

I have java installed on my computer, but none of my browsers seem to detect it a and I'm not able to run any applets. (Trivial, as it may seem) I've wasted a lot of time googling and trying to ...
4
votes
5answers
13k views

Why there is no sun-java in Debian Wheezy and how can I fix this?

Sun's java is in Debian Lenny and Debian Squeeze repos (non-free) but no in wheezy1,2. Why? edit: after further research I found that java has been removed. reson: ROM; security issues and newer ...
4
votes
2answers
8k views

How to check Java version remotely

How can I check the Java version installed on a remote computer that I can't remote on. It's being used by someone so I can only check by \\computer-name\c$... Thank you!
4
votes
2answers
11k views

how to install java 1.7 runtime on macos 10.9 mavericks?

I tried to install Java 7 Update 51.pkg, downloaded from here (http://java.com/en/download/mac_download.jsp?locale-=en), following the instructions here ...
4
votes
1answer
176 views

How do Java applets get loaded?

I had this conversation yesterday with a friend of mine and I was trying to explain to him that applets are precompiled code that is loaded by the JVM through the Java browser plugin. I am trying to ...
4
votes
3answers
9k views

Java issue (nonexistent Java Runtime)

I'm currently having an issue with playing Minecraft. I played Minecraft perfectly before I had an issue with my computer. Now when I open the minecraft.exe file (or try to open Java itself from the ...
4
votes
3answers
5k views

In what directory should I install Jetty on Ubuntu Linux?

I've downloaded jetty-6.1.14.zip into my home directory on my Ubuntu 8.04 box. Where is the appropriate place to unzip it? I put it in /opt because /opt is supposedly for "storing random data that ...
4
votes
6answers
6k views

Android SDK emulator freezes on a Mac running OS X 10.6 Snow Leopard

I'm having trouble running the Android SDK on both of my Macs running OS X 10.6.2 Snow Leopard. This appears to be a 64-bit vs. 32-bit issue, as Snow Leopard now defaults to 64-bit everything, ...
4
votes
2answers
17k views

How can I make JDK 7 the default JDK in NetBeans?

I uninstalled JDK 1.6.26, then installed JDK 7 and changed my PATH to point to the new version. However when I now open NetBeans it shows me this error: Cannot locate java installation in ...
4
votes
3answers
181 views

Java installed, but “java -version” showed nothing, why?

I just bought a Win 7 PC, installed jdk1.6 and Netbeans, NB works fine, but when I did "java -version" in a command prompt, it can't find java, why ? How to fix it ? Edit : I thought the installation ...
4
votes
2answers
274 views

How do I toggle Java on/off in Safari browser?

In Safari preferences there is an option to disable Java which is nice but a bit cumbersome. Is there a plugin/addon/extension or an easy way to toggle Java on/off?