I have checked and found that for Java 7, following holds true
Java Web Start version 1.7.0 is included in the Java™ Platform, Standard Edition 7 JDK
I got the above from oracle docs.
But the same I am not able to find for Java 8.Is there any doc on oracle or is there any way to check the version of java web start.
Thanks
Amanjot Singh
Related
Recently, our online web service using tomcat 7.0.23.0 and JVM 1.7.0_51-b13 need to upgrade to java 8, which tomcat version is suitable for java 8 ?
See this link
http://tomcat.apache.org/whichversion.html
for details about which tomcat versions are supported on which java versions.
According to that link, tomcat 7.0.23.0 should work on java 8
Tomcat 7 is good and works well for Java 8 however, not recommended for Java8 as all features of Java 8 were not supported in tomcat 7.
Please use tomcat 9.x with Java 8 (Recommended from Tomcat Apache)
Please refer http://tomcat.apache.org/whichversion.html
Latest stable version supported on Java 8 is Tomcat 10 but the users of Tomcat 10 onwards should be aware that, as a result of the move from Java EE to Jakarta EE as part of the transfer of Java EE to the Eclipse Foundation, the primary package for all implemented APIs has changed from javax.* to jakarta.*.
I have Java 8 installed on my computer, before it was Java 7. But I need to work with version 6.
How can I install Java 6? On Oracle website, it is no longer possible to download the old versions.
How can I downgrade Java if it was not installed before?
Please be aware that Java 6 is no longer receiving public updates. You always should use the most updated Java version.
But you can find some historical Java releases on Oracle Java Archive. The page warns:
WARNING: These older versions of the JRE and JDK are provided to help developers debug issues in older systems. They are not updated with the latest security patches and are not recommended for use in production.
These are the links to download old versions of Java SE:
Java SE 8 Archive Downloads
Java SE 7 Archive Downloads
Java SE 6 Archive Downloads
Java SE 5 Archive Downloads
Java SE 1.4 Archive Downloads
Java SE 1.3 Archive Downloads
Java SE 1.2 Archive Downloads
Java SE 1.1 Archive Downloads
It's possible. A lot of notable software can be traced to the very first version (for testing or other purposes). You can actually find and download the first version of Firefox, Chrome, Netbeans, WordPress etc. The same with Java. They just make it a little bit more difficult to dig the old versions up, and they intentionally hide it for good reasons.
These older versions of the JRE and JDK are provided to help developers debug issues in older systems. They are not updated with the latest security patches and are not recommended for use in production.
and
Keeping old and unsupported versions of Java on your system presents a serious security risk.
(and Java is already not really reputable, security-wise)
You cannot "downgrade" a certain version of Java. You install different versions of Java you need, and set your project to be built with that specific version. On a system, there can be several Java versions installed together.
I am just starting with the Oracle Java EE 7 tutorial. While I have already gained some practice with an existing Apache Tomcat Environment I wanted to get in touch with the complete tutorial to have a clear learning path and trail.
So I am currently using a Mac with OS X Mavericks. I have already installed an Oracle JDK 1.7 which is working pretty smooth. Developing is also nice so no problems with that.
Now I came to the part in order to download "Java EE 7 SDK/JDK" (http://docs.oracle.com/javaee/7/tutorial/doc/usingexamples001.htm#GEXAJ)
I have done so and run the installer. What I can see it does is installing a glassfish4 environment (which seems to be fine as the tutorial covers glassfish and I would use it in tutorial). I also ran the Update Tool to get the java-ee-7-tutorial-examples.
Anyhow adding the glassfish server to netbeans 8 I mentioned in the "Java" Tab there is just JDK 1.7 which points to me 1.7 Java JDK location on the system.
Trying to find any specific EE 7 location nothing seems to be the right location (find / -name java)
So what exactly does this installation do in other words than just installing glassfish environment?
And what is the use case of having the EE 7 SDK/JDK ? Maybe I am a bit confused but I want to have these things clear for myself in order to understand it.
GlassFish Server Open Source Edition 4 is the reference implementation of the Java EE 7 specification. So you can never download Java EE itself like you do with Java SE by downloading the JDK, but you always download an application server implementing it.
At the moment, you have JBoss WildFly 8 as alternative, but it usually takes some time after more, especially commercial application servers like Oracle's WebLogic follow.
So concerning your IDE, you add the JDK as runtime as in every other java project and GlassFish as a server and target for your deployment.
Hint: In case you experience problems when trying to get the samples via updatetool (at least it was the case when I did the Java EE 7 tutorial), just try again - java.net is so awfully slow sometimes.
Installing java for casual java developers has always been something of a minefield. E.g. do we need SE or EE edition for say STS/Grails, do we need the SDK or JDK? I am pretty sure I need the JDK 1.7 for EE edition. The question is, how do I get the JDK without the bloated SDK? My understanding of the SDK it that its additional tools such as glassfish, something I have no need for. Space on my SSD is a premium.
The oracle EE download page:
http://www.oracle.com/technetwork/java/javaee/downloads/index.html
only seems to allow you to download the JDK AND SDK, is there any way to install just the JDK?
I already have the 64 bit JDK installed, but sadly, STS only works with 32 bit (on windows). Will these conflict when I install both?
You can download JDK 7 here
The Java SDK and JDK are different you can check here difference between them
You can download any version of JDK from this oracle archive link, To download older version of JDK please register in the on click on download link
GlassFish Server Open Source Edition 4 is the reference implementation of the Java EE 7 specification. So you can never download Java EE itself like you do with Java SE by downloading the JDK, but you always download an application server implementing it.
Source
I am compiling my web app in Netbeans against Java EE 5. I know that the String.isEmpty() function is only supported in Java 6. Having said that, I can still compile my project using the .isEmpty() in my code.
How come Netbeans is allowing my web app to compile if I am compiling against Java EE 5?
The compiler level is not equal to the JDK level you use for compiling. The compiler level only checks for the syntax and of course creates a different output. But the compiler itself will use the jdk on your classpath so if you compiled with java 5 option but with the java 6 jars on your classpath the code will compile without an error.
You should check your classpath.
As many have pointed out, Java EE versions are not strictly tied with Java SE (JDK) versions. Mostly, they require a minimal Java SE version but are compatible with later versions.
Java EE 5 specification (downloadable PDF here) says:
This specification requires that containers provide a Java Compatible™ runtime
environment, as defined by the Java 2 Platform, Standard Edition, v5.0 specification
(J2SE)
Since JSE versions are backwards compatible, you can take a container compatible with Java 5 and run it on top of Java SE 6 or Java SE 7.
You can check the compatibility level that Netbeans is using by checking the project "Properties > Source > Source/Binary Format"
If you still have doubts about "Java vs Java EE" you can look for several questions here on SO about the difference between Java SE and Java EE.