I would like to know how Internet Explorer picks the JRE version. When I load an applet through browser, how does browser decides to use which JRE version when there are multiple JRE installed on the machine?
Does IE browser always picks latest version of JRE, or it can use a lower version which is installed on the machine?
Latest version is picked in principle, but JRE family version is specified and it matches the security baseline, IE can use a lower version.
For example, if 1.8.0_45 and 1.7.0_80 are installed, IE can use Java7 and Java8. But if 1.8.0_45 and 1.7.0_71, only Java8 is available.
Deploying Java Applets With Family JRE Versions in Java Plug-in for Internet Explorer
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I am looking to Download IBM Java JDK 8 for windows 10 OS or Windows Server 2012 R2 OS.
Does IBM provide JAVA JDK 8 software so that we can install and test it?
Or
Does IBM provide only AIX and Linux supported IBM Java 8 installation software?
I referred the IBM page, it contains only AIX, Linux version of Java installation software.
https://developer.ibm.com/javasdk/downloads/sdk8/
IBM says
The SDK is available only as part of an IBM product.
Which means follow the links at the end of the page you linked from your question, download Eclipse, use the JDK that will be installed with Eclispe. Then, if you don't want Eclipse, delete it and keep the SDK.
OR
You can use OpenJ9, which is the JDK used by the IBM SDK.
As an aside I have to wonder why you need the IBM JDK in particular.
I just installed JDK 1.8.0_102 along with its JRE. In Eclipse Mars.2 (4.5.2) when I go to project settings for a project created before I installed JDK 1.8.0_102, I see that the current JRE (for that project) is 1.8.0_20. This is expected. When I attempt to select a different JRE (I want to use 1.8.0_102), I see this list:
So, with JRE 1.8.0_102 I can have compatibility with Java versions 1.2 through 1.7, but if I want compatibility with Java version 1.8, I must pick JRE 1.8.0_20. How can this be? Why is there no 1.8.0_102 version that is compatible with Java 1.8?
I think this is because you have 1.8.0_20 set as the JRE to use for this execution environment as an exact match.
In the Preferences open 'Java > Installed JREs > Execution Environments' and select the 'JavaSE-1.8' entry. Change the selected 'compatible JRE' to be the 1.8.0_102 JRE.
The other execution environments probably don't have a explicit JRE selected so they are just using the newest available.
I want to run my app only with particular JRE 1.7 version. If the client has lower versions of JRE installed, I want to auto-install the JRE 1.7 before launching the app via JNLP file.
I have the following line in my JNLP file ...
j2se version="1.7+" href="http://java.sun.com/products/autodl/j2se
But, when I launch the application with JRE6, I am getting the error ...
"The application has requested a version of the JRE (version 1.7+) that currently is not locally installed. Java Web Start is unable to automatically download and install the requested version. This JRE must be installed manually."
what changes are required in the JNLP file to auto download and install a required JRE 1.7 version on the client machine.
Since the "flag as duplicate" function, no matter what subset of the target title I enter in the search box, does not offer the following question, here it is as answer:
See Java Web Start is unable to automatically download and install the requested version.
In my personal view however, leaving it to the Java runtime to "upgrade" itself on demand feels risky. The Java deployment toolkit (which I think would be involved) has been found to be vulnerable more than once. I would prefer requiring admins or users to manually install the required JRE version.
I need to run the Oracle JVM in the "client mode". Is there any option to do this on an x64 operating system?
I installed Oracle 7 JDK per apt-get. It installed the Oracle JDK and JRE x64 edition. So i have only /usr/lib/jvm/java-7-oracle/jre/lib/amd64/server directory and no amd64/client directory.
On the Oracle website, you can download the JRE Linux x64 and x86 packages, precompiled. I download them both and looked into the folders.
x64 package contains only amd64/server directory.
x86 package contains i386/server AND i386/client directories.
So, what can I do to use the client mode? Have I install the x86 edition of java? I think I can do this only manually and not with apt-get because it recognize that I have a x64 operating system.
Thanks!
AFAIK the 64bit version of the Oracle JVM only supports the server mode at the moment (my guess is we'll never see a client version). This FAQ would see to support that. I don't think the Open JDK project has a 64bit client version either but it's been a while since I checked: this post confirms my suspicion. It seems the server VM is as good as or better than any dedicated client VM would be.
I was working in a Java 1.6 project in Windows, and now I have to work from my laptop, that is a Macbook Pro (Intel Core 2 Duo) with a MacOsX Leopard 10.5.8 installed.
In the same laptop I've worked in the past with Java 1.5 with any problems, but now I can't work with 1.6, and I don't know what I'm doing wrong.
When in a terminal I write: java -version I get java version "1.6.0_26"
But when I'm trying to install last version of Netbeans (7.0.1) I get the message:
It's not possibe to install NetBeans 7.0.1 in this volume. This
software can be installed and work only with Java 6
Then I tried to work with Eclipse. I've download last version of the IDE, and open the project. I get some compile errors (the parts of Java 1.6).
I went to Preferences -> Java -> Compiler->Compiler compliance level from 1.5 to 1.6
Then I get a message that says:
When selecting 1.6 compliance, make sure to have a compatible JRE
installed and activated (currently 1.5) Configure
But when I try to change to 1.6
The selected JRE does not support the current compiler compliance
level of 1.6
What I have to do to work with Java 1.6?
EDIT:
I've noticed that at
/System/Library/Frameworks/JavaVM.framework/Versions/
1.6 seems not to be installed
On OS X Leopard (10.5) the JDK 1.6 can only be used on 64bit-hardware (also in the Apple FAQ). If you are on a 32bit-hardware, you will not be able to run Java 1.6.
If you are on 64bit hardware, you can install it via SoftwareUpdate or via the Developer Tools. To select the running version of Java you can use the Java Preferences.
Here you will find a chart which (Apple)-JDK is running under which OS X version.
There is an "unofficial" port I have not tried: The project SoyLatte brings JDK 1.6 to OS X 10.4. and later - perhaps you can have a try with this.