I installed new Java from https://www.java.com/en/ but I am little confused about where installer store the java folder. It is stored in Program Files (x86). I don't understand what it means. I would like to to use 64-bit architecture. Why is it installed in (x86) program folder? Is that mean I am using 32-bit java?
Yes, it appears that you have installed the 32 bit version of Java. You can verify this by opening a Command Prompt, changing to the bin directory of the Java install, and typing:
java -version
If you are running 64 bit Java 8 you would see something like this:
java version "1.8.0_40"
Java(TM) SE Runtime Environment (build 1.8.0_40-b26)
Java HotSpot(TM) 64-Bit Server VM (build 25.40-b25, mixed mode)
You want to download the Windows version which is labelled Windows x64.
Here is a link where you can download it.
Related
I want to make a python-android-app using this software. I have installed java JDK, when i run java -version i get:
java version "1.8.0_91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)
However running the line python android.py installsdk from witin rapt directory (as described in the tutorial) tells me that i have no JDK:
I'm compiling a short test program, to see if you have a working JDK
on your system.
I was unable to use javac to compile a test file. If you haven't
installed the Java Development Kit yet, please download it from:
http://www.oracle.com/technetwork/java/javase/downloads/index.html
The JDK is different from the JRE, so it's possible you have Java
without having the JDK. Without a working JDK, I can't continue.
You need to set your jdk to be accesible, and within path / java home :)
Here help from google:
To set JAVA_HOME environment variable, do the following: Launch
Terminal by pressing Ctrl + Alt + T on your keyboard. Depending on
where you installed your Java, you will need to provide the full path.
For this example, I installed Oracle JDK 7 in the
/usr/lib/jvm/java-7-oracle directory.Aug 13, 2012
I setup Java 6 to be used by all other application. Normal setup with JAVA_HOME, JRE_HOME, etc. This is working fine.
I have another application that needs Java 7. I downloaded Java 7.exe and extraced tools.zip from it to a folder. Now I am trying to check the version going to the bin folder. When I type in java -version, I get the following error.
error occurred during initialization of vm
java/lang/noclassdeffounderror java/lang/object
where as java -fullversion shows Java 7. It looks like even though I am in the bin folder where Java.exe exists, it still getting the one from PATH?!?!
How do I use the java.exe from a folder ignoring the one from PATH?
You need much more than java to run java. You need all the rt.jar and lib which come with Java. It sounds like you are missing some part of the JRE or it can't find your JRE.
I suggest you re-install the version you need and run it using the full path name like
c:\>"c:\Program Files\Java\jdk1.7.0_60\bin\java" -version
java version "1.7.0_60"
Java(TM) SE Runtime Environment (build 1.7.0_60-b19)
Java HotSpot(TM) 64-Bit Server VM (build 24.60-b09, mixed mode)
c:\>"c:\Program Files\Java\jdk1.8.0_45\bin\java" -version
java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b15)
Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)
By using the full path name you can use any specific version from any directory.
I was using openjdk 7, then all of a sudden I wasn't able to stream a video with JWplayer. I tried setting $PATH in Ubuntu 14.04 among lots of other things until I just gave up and purged openjdk completely. I installed Oracle 8, and I still get the same issue.
$ java -version
java version "1.8.0_20"
Java(TM) SE Runtime Environment (build 1.8.0_20-b26)
Java HotSpot(TM) 64-Bit Server VM (build 25.20-b23, mixed mode)
The videos just say that Java is not installed, to install it and restart my browser, etc.
This is extremely frustrating. Any ideas?
JW Player does not make any use of Java at all. It is a script written in Javascript, which is simply part of your browser.
Recently reinstalled system and meet interesting problem. I installed java jdk8, however when I try to verify version on java.com it asks to install java. Meanwhile:
java - version
java version "1.8.0_05"
Java(TM) SE Runtime Environment (build 1.8.0_05-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.5-b02, mixed mode)
echo %JAVA_HOME%
E:\Programms\Java\JDK8
echo %JRE_HOME%
E:\Programms\Java\JDK8\jre
echo %PATH%
C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Windows\system32;C:\Wi
ndows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;E:\Pr
ogramms\Java\JDK8\bin;E:\Programms\Java\JDK8\jre\bin;
Java Control Panel > Security > Enable Java content in Browser is checked
Why browser and java.com does not recognize my java instalation? Java plug-in is not included in jdk?
I suspect that you need to install the JRE rather than a JDK using the Windows installer at (java.oracle.com).
This should set up everything properly.
Posting comments as an answer as per request by Yarh:
Probably the browser is 32 bits, then indeed there are not going to be any Java plugins installed in it if you installed the 64 bits Java runtime as part of the JDK. I always install the 64 bits JDK and then separately I install the 32 bits runtime through java.com (minding not to install the flipping toolbar).
There is no conflict to install both a 32 bits runtime and a 64 bits runtime, that is the advised way to support all types of browsers.
Eclipse complains: JRE version is 1.6.0; version 1.7.0 or later is needed to run Google Plugin for Eclipse.
In the Terminal, java concurs:
> java -version
java version "1.6.0_65"
Java(TM) SE Runtime Environment (build 1.6.0_65-b14-462-11M4609)
Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-462, mixed mode)
But in System Preferences \ Java \ the Java Control Panel says Your system has the recommended version of Java: Java 7 Update 51
and points to /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java.
Eclipse preferences show that the installed JRE is at:
/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
To point Eclipse to Java 7 (1.7.0), it's enough to change the preference:
What is the source of the discrepancy in Java versions? Is this an instance of having different PATHs between the command-line Mac and the windowed-Mac?
Edit
If I edit /usr/local/adt-bundle-mac-x86_64/eclipse/Eclipse.app/Contents/MacOS/eclipse.ini by adding
-vm
"/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java"
Eclipse refuses to start.
And yet this is indeed 1.7:
> "/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java" -version
java version "1.7.0_51"
Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode)
If you want to be certain of the JVM that is used to run Eclipse, you need to specify it in your eclipse.ini file, according to these instructions.
Installing this update might fix your problem:
http://support.apple.com/kb/dl1572