The Java Development Kit (JDK) is a set of utilities that allow one to create software systems for the Java platform. It consists of several tools and libraries.

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OS X - Eclipse - WindowBuilder -> “Incompatible Java versions”

No matter what I do, Eclipse keeps saying that "Eclipse is running under 1.6, but this Java project has a 1.7 Java compliance level, so WindowBuilder will not be able to load classes from this project....
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2answers
67 views

Groovy console won't load on Windows 7 x64

I've never worked with Groovy before. I installed the executable and the latest JDK from the Java website. I set my system ENV variables JAVA_HOME to C:\Program Files\Java\jdk1.8.0_77 and ...
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7answers
15k 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 ...
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1answer
53 views

Error: Could not find or load main class with OpenJDK and Oracle Java on CentOS 7

On CentOS 7.2 Linux I have successfully downloaded and installed Oracle Java with: # rpm -Uvh jdk-8u91-linux-x64.rpm Also there is already OpenJDK installed: # rpm -qa | grep -i jdk java-1.8.0-...
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3answers
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What's the difference between JDK 8u91 and 8u92?

The Oracle website seems to be recommending version 8u91 when you click on "Java for your computer". But when you click "Java for Developers", it gives two options: 8u91 and 8u92. What's the ...
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2answers
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Is it safe to delete Java folders from C:\Users\(Username)\AppData\LocalLow\Sun\Java

I am using a Windows 7 64-bit PC. I have many folders in C:\Users\(Username)\AppData\LocalLow\Sun\Java with names of older Java versions like: jdk1.7.0_21_x64 jre1.7.0_45 jre1.7.0_25 These folders ...
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2answers
13k views

Upgrade to java 1.7 in eclipse on mac

I'm sort of a beginner with eclipse but I want to update the libraries or build path or whatever to java 1.7 from java 1.6 and I can't figure it out. I'm a computer science student at the university ...
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1answer
142 views

Unable to Install JDK 1.8 64-bit on Windows 10

I have installed Windows 10 64 bit on my system, Now when i am trying to install JDK 1.8 64-bit, its giving me following error message. These are my system configurations I have successfully ...
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0answers
13 views

Java JRE or JDK silent Update

Is there a way to Auto Update JRE or JDK if an update is available? Background periodically JRE or JDK says an update is available, I would like to do this check using Task Scheduler on system boot ...
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4answers
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JDK-Installer doesn't install

I can't install JDK on my Windows 7 64bit system. I downloaded the latest version (jdk-7u4-Windows-x64.exe) from Oracle and ran it. A warning appeared, because it's a download. I commited to continue. ...
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3answers
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Error: Could not find or load main class(Java)

I am using java in ubuntu machine. I can run java program from my eclipse. But I have some work that that I have to perform from command prompt. I could compile java program using javac HelloWorld....
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Wrong java -version being reported

I am running Windows 7 Professional x64 and have the following Java versions installed: x64 C:\Program Files\Java jdk1.6.0_24 jdk1.7.0_04 jdk1.7.0_07 jre6 jre7 x86 C:\Program Files (x86)\Java ...
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1answer
53 views

JDK as an archive for Windows

My company makes use of the latest version of Oracle JRE (1.8.0u66), though I use the JDK instead of only the JRE. The client I'm dispatched to requires the latest version of Oracle JDK 6 (1.6.0u45) ...
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2answers
58 views

How to set a command without defining path everytime?

I have a command which is: ./keytool But I always have to go to this folder to use it: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.65-2.b17.el7_1.x86_64/jre/bin How can I just use the following ...
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0answers
61 views

FireFox doesn't recognize correct Java RE

I have Win7 with FireFox 41.0.2 with a very old profile and 7 different Java instances. I can't simply delete old Java instances or the whole FireFox profile, and shouldn't be needed to. FireFox ...
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votes
1answer
131 views

Changing the system path variable is not saving the new path

I have just installed JDK (Windows 8 x64), when I run java in a cmd window all is fine, but when I run javac it gives an error message. I have found that when I use echo %PATH% it shows the path as ...
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2answers
615 views

Install 64-bit JDK versions with Ninite

I'm attempting to build a Ninite installer/updater for my own use and I've found it fantastic. However, as part of the profile, I would like to include the installation of multiple versions of the 64-...
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1answer
123 views

Java SE Development Kit install interrupted

I want to install Xamarin in Windows 8.1. it requires to install Java Development Kit 1.6 or above 32-bit. when I try to install JDK, I get this error message" I'm using Windows 8.1 x64. How can I ...
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1answer
25 views

How can I isolate a JPNLP (web deploy) Java version from other, legacy versions on the computer?

I have a JNLP that runs the following shortcut when installing: C:\Program Files (x86)\Java\jre1.8.0_25\bin\javaws.exe" -localfile C:\Users\akelly\AppData\LocalLow\Sun\Java\Deployment\cache\6.0\42\...
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1answer
13k views

“Java returned exit code=13” when starting Eclipse

I have some problems starting Eclipse. When I try to start it, this error window appears: Does anyone have any idea of how to fix this? I am using Windows 7.
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1answer
2k views

JDK 8u31 Not Installing on Windows 10 Preview

I'm trying out the Windows 10 Preview on my computer, and I tried to install Java and the JDK. Java installed fine from Java.com, but intalling the JDK from the JDK8 Download Page gave me the ...
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2answers
90 views

Changing terminal Java version - not all options shown

I'm trying to change the JDK that the linux terminal is using to run jar files from 1.6 to 1.7. I'm trying to do this by using the command update-alternatives --config java which is giving me the ...
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1answer
701 views

How to recover /usr/libexec/java_home executable on Mac OS X 10.8.5?

Today I accidentally delete the /usr/libexec/java_home executable on my Mac OS X 10.8.5 (Mountain Lion) while trying to install latest JDK. Then, I realized that homebrew (package manager) and some ...
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1answer
80 views

Should I trust download.oracle.com if my certificate does not match?

I've been getting this every time I try to download a JDK 8 update to my MacBook. First, I go here: http://www.oracle.com/technetwork/java/javase/downloads/index.html I click the download location ...
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1answer
870 views

Cannot install JDK on Windows 8

I am struggling to install Oracle's JDK7 on my Windows 8.1. I got the jdk-7u51-windows-x64.exe file from http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html as I should,...
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2answers
12k views

64 Bit Windows 8.1 Failure to reinstall Java JDK and JRE

Attempting to update to jre-7u67 from 65 did not appear to work. On reattempting, installation failed with a “Access is denied” message. JDK was still there but I followed recommendations to remove ...
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1answer
693 views

Switching JRE version

I have JDK 1.8.0_05 64 bit, 1.6.0_45 64 bit and 1.6.0_39 32 bit versions installed on a same machine. I am using this machine for Android app development and it was working fine with Native Android ...
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1answer
223 views

How to uninstall Java version 1.4

I would like to asks a question about how to uninstall my old version of java(1.4.2_06) if it is not shown in add/remove in control panel? I'm using windows xp. I already uninstalled all my java that ...
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4answers
9k 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 ...
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1answer
98 views

Chrome doesn't recognize that I already have Java installed

I've installed the latest JDK which also installs the JRE (1.8.0.25) The paths all seem to be set fine and Eclipse runs just fine. But my browsers do not recognize that Java is installed and want me ...
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1answer
254 views

Debian, shell and jdk 8

I'm trying to download jdk on debian 7 using wget command wget --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u25-b17/jdk-8u25-linux-x64.tar....
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0answers
97 views

JRE 7 VS JDK 7 (The jdk seems to have priority over the jre)

So I installed the JRE 7 for Minecraft and the JDK 7 for programming and when I'm not programming I want to play some craft but it seem's that having both the JDK and JRE conflicts and my Minecraft ...
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0answers
860 views

How to install Java 7 on Solaris 9?

Oracle states the following regarding Java 7: This version of the JDK is supported on the Oracle Solaris 10 Update 9 or later OS, Oracle Solaris 11 Express OS, and Oracle Solaris 11 OS ...
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1answer
336 views

Two versions of java installed in two locations on my mac, which is right?

I am having trouble with java install locations. I am using a mac running 10.9.2 and i have two versions of java installed jdk 1.7.0 & jdk 1.6.0 but both installs are in different locations. jdk ...
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0answers
189 views

Slow Windows Application Startup

I have Windows 8 Pro/i5 3320M laptop with 8GB memory. Java based applications such as Eclipse, Phpstorm takes about 15-30 mins to load. (i assume issue is with java apps, others work fine). I tried ...
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0answers
142 views

Java/JDK filesystem organization on OSX (Mavericks)

If you install the JDK via the Oracle DMG, you get content put under /Library/Java/JavaVirtualMachines/jdk1.7.0_xx/Content/Home/bin as well as /System/Library/Frameworks/JavaVM.framework/Versions/...
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1answer
639 views

Java version not recognized when JAVA_HOME defined for a particular USERACCOUNT

I have been struck with problem on my development box. I have JRE6 on my system and NO ADMIN RIGHTS. Used this command to add user variables rundll32 sysdm.cpl,EditEnvironmentVariables I have ...
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5answers
7k views

Can't install JDK on Windows 7, “Wrapper.CreateFile failed with error 123”

I'm trying to install JDK on Windows 7, 32 Bit. I'm logged in as administrator, but it tells me: Installer: Wrapper.CreateFile failed with error 123: The filename, directory name or volume label ...
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3answers
47k views

How to uninstall Java SE from the command line

Oracle states that the Java SE installer is built using MSI, but the help page, rather unhelpfully doesn't list uninstall options. I need to do a command line uninstall, and I can't figure out or ...
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3answers
955 views

Ubuntu 10.10 -bash: java: command not found

I just bought fresh VPS with Ubuntu 10.10. I following this guide http://l2jserver.com/wiki/Setup_Server_-_Ubuntu for creating Lineage2 server, but this doesn't matter. I try to use command java -...
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votes
4answers
15k views

How to install jdk with yum on Fedora 17?

I want to install jdk by yum on Federa 17 and using : su -c 'yum install java-1.6.0-openjdk' But it show "no available package". How can I do to install it ?
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1answer
198 views

How to Restore Java on Snow Leopard?

I tried to install Java 7 on my Macbook running Snow Leopard following the instruction detailed here: http://stackoverflow.com/questions/13536667/how-to-install-java-jdk-7-on-snow-leopard/18788474#...
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2answers
111 views

How to set up environmental variable in Ubuntu?

I have never used Ubuntu before. How do I go about setting an environmental variable that points to JDK? I installed it on my Desktop. I typed in "EXPORT JAVA_HOME=~/Desktop/jdk" in the command prompt ...
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Windows 8 & Java Development

I'm considering to upgrade my PC to Windows 8, but I have one concern though. I haven't yet found any "confirmation", that the JDK and Eclipse will work on Windows 8. Have anyone tried to develop/...
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0answers
115 views

Installing jdk 1.7.0 java -version not working

I have installed java jdk, following the steps as described here but the problem is when i do which jav it gives me the output /usr/bin/java but when i do java -version it says bash: /usr/...
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1answer
13k views

How to install Sun's JDK on CentOS?

I having difficult time installing Sun's JDK on CentOS. The default installing with "yum" is "openJDK", but I need to install Sun's JDK. Is there easy instruction out there I can use or any ...
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1answer
3k views

Eclipse says “Access Denied” when running javaw and how to fix it?

I'm trying to get Eclipse to compile and run a HelloWorld class but it can't even do that. I have installed Eclipse x86 SDK 4.2.0 together bit with the latest JRE and JDK both in 64 bit as well. I ...
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1answer
7k views

Should JRE 7 be kept in Program Files (x86) or Program Files in Windows 7 (64-bit)?

I have updated JRE to version 7 update 4 and JDK to version 7u4. I have two Java folders, one in Program Files another on Program Files (x86). JRE was automatically downloaded to Program Files (x86) ...
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0answers
391 views

Where to find a zipped/tarred JDK 6

Ok, I concede. I have been looking in vain for a zipped and tarred copy of any later version of Oracle's JDK 6 for Solaris SPARC (32-bit), but all I can find is the shell scrip that "installs" it. ...
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1answer
462 views

Eclipse startup Error code=1?

I just downloaded eclipse-java-helios-SR2-win32-x86_64.zip extracted the zip. When I'm trying to run I get this error: Here is my .ini file: -startup plugins/org.eclipse.equinox.launcher_1.1.1....