I have downloaded and installed tomcat 9 to my machine, but on Eclipse > Window > Preferences > Server > Runtime Environment, after clicking on Add, I see only Tomcat 7 and Tomcat 8, but not Tomcat 9.
What I have done:
1) installed tomcat 9 to local server;
2) updated eclipse to Mars (latest as of 2015-11-25);
3) installed eclipse "JST Server Adapters" and "JST Server Adapters Extensions"
Note:
My purpose of using tomcat 9 is it seems to be the only version that explicitly support java 8 and later, and my web app is using java 8. (http://tomcat.apache.org/whichversion.html)
I also have tomcat 7 exist in project but I also want to keep it in the machine, not to delete it.
Please see screenshot.
Please let me know about any config that I missed!
There are two things to note here:
Tomcat 9 is not released yet. Not a final version that is. If you check the official website, you will see that the only available version is an M1 version. Hence there is no support from Eclipse WTP for this early version. It will come soon, but not yet.
Tomcat 9 is not the only version that explicitly supports Java 8. If you check this page, you will see that "Supports Java version: 8 and later", which in this context means, that it officially support only Java 8 and above. It does not mean however this is the only one supporting Java 8. Theoretically you should be able to use any Tomcat version, in practice a Tomcat 8 will work perfectly well, since it support Java 7 and above. The majority of people with a Java8 + Tomcat combination are using Tomcat 8. Tomcat 8 also has Eclipse WTP support.
I was able to get the adapters for Apache 9 by installing Eclipse Java EE Developer Tools 3.9.4
Use a later version of eclipse e.g. Eclipse Neon.
It should work.
I tried all the above methods but still was unable to find solution for the problem then I did the following and that helped me to add Apache tomcat to my Eclipse IDE:
After following Help>Eclipse Marketplace and installing Eclipse Java EE Developer Tools 3.10 still tomcat was not available so I went to Help>Eclipse Marketplace>Installed>Eclipse Java EE Developer Tools 3.10>Change I put tick on the following and then I got the Apache Tomcat finally in my Eclipse IDE:
JST Server Adapters
JST Server Adapters Extensions
JSF Tools-Tag Library Metadata(Apache Trindad)
Git Integration for Eclipse
Use later EE version of Eclipse! Contains Tomcat adapters 8.5 and 9.0
I had same problem, but not now.
On my side, eclipse marketplace was stucked on previous WST server adapters.
I've used old update feature Windows > Install New Software
In main update site, I found Web, XML, Java EE and OSGi Enterprise Development part, where WST Adapters where ready to update ...
Eclipse MarketPlace often embed too much features & plugins.
On my own point view, easier to keep a light eclipse ;-)
Tested on eclipse 2020-09
I have just installed WindowBuilder for Eclipse and java 1.7 JDK, but when I create a new JFrame in Eclipse, and try to open the "design-view" in WindowBuilder I get the following error: "Eclipse is running under 1.6, but the Java project has a 1.7 Java compliance level, so WindowBuilder will not be able to load classes from the project. Use a lower level of Java for the project, or run Eclipse using a newer Java version."
How to Resolve Incompatible Java version Error in Eclipse in mac?
You might have installed the Java 1.7 SDK but it looks like Eclipse is started with the older one (1.6).
The WindowBuilder is integrated into Eclipse and will use the same Java instance as Eclipse (that is the 1.6 version).
However your project will use Java 7. The WindowBuilder (Java 6) will be unable to load classes from the higher version which your project uses (Java 7).
What you need to do is:
Configure your eclipse to start with the newer (Java 7) version. This can be done in the Eclipse.ini file.
Which Eclipse you're running?
You definitely need to upgrade your Eclipse to a newer x64 Version to use Java 1.7.0
I have Eclipse Indigo for Java SE and I have Tomcat in Ubuntu. I would like to develop a Java EE application, using Servlet and JSP.
My Eclipse doesn't include Java EE support. Can I add this somehow? If yes, any extra tool or plugin I need to install or download?
Yes. You'll need to use a server like Tomcat to run your application anyway. (Which you have already.) It comes with <tomcat install>/lib/servlet-api.jar. Just include this in your classpath when developing so the code compiles.
Since Tomcat doesn't support the full Java EE spec, it only gives you the Servlet APIs. But that is enough for what you are doing.
I am just starting with Java EE6. i have installed netbeans 7.2 though the sample applications based on java EE6 runs successfully. My question is do i still need to install Java EE6 SDK?? if not, then why is that Java EE6 SDK comes separately???
No you don't need it.
Java EE SDK is available as a standalone package because SUN's philosophy was not to require any specific environment (IDE) to do Java development.
I'm using Eclipse 3.7 classic and I need to do Java EE development.
How can I start development in eclipse 3.7 itself? A different version of Eclipse is available for Java EE development, but is it possible to use the 3.7 version itself?
From where can I get add-on plugins to do the Java EE development and web page creation?
You can accomplish this by going to update sites for all the add-ons and plug-ins that you'd like. The Eclipse for Java EE download is still 3.7 Indigo. It just already has the typical suite of plugins for Java EE development installed.
http://www.eclipse.org/downloads/
http://www.eclipse.org/downloads/packages/eclipse-ide-java-ee-developers/indigosr2