![]() Why would you need the JDK then? Because the application server will convert JSP into Java servlets and needs to use the JDK to compile the servlets. For example, if you are deploying a web application with JSP, you are technically just running Java programs inside the application server. Sometimes, even if you are not planning to do any Java development on a computer, you still need the JDK installed. On the other hand, if you are planning to do some Java programming, you need to install the JDK instead. Usually, if you only care about running Java programs on computer you will only install the JRE. Ive configured the Server Runtime Environment under Window > Preferences > Server > Runtime environments. It compiles and runs on JDK 11 to JDK 20. In project properties > build path, Eclipse reports 'Unbound'. ![]() You may try JDK 9 as well, but it's not supported, since it has not been released yet. It is capable of creating and compiling programs. GlassFish 7.0.4 is a final release, containing final Jakarta EE 10 APIs. If that is the case, on the Glassfish download page the requirements listed are as follows: Java EE 7 requires JDK 7 or above, JDK 8 u60 or above is recommended for GlassFish 4.1.1. It has everything the JRE has, but also the compiler ( javac) and tools (like javadoc and jdb). JRE The Java Runtime Environment (JRE) consists of the barebones. Paths and Environment Settings for the JDK Software Use the Correct Java Version Use the JDK Binaries Set the JAVAHOME Environment Variable Set Other Environment Variables As Necessary Known Issues Known Issues in GlassFish Server 3.1. GlassFish Server 3. You experience JDK-related issues in a variety of circumstances. ![]() The JDK is the Java Development Kit, the full-featured SDK for Java. It contains tools that allow compilation of Java code, running and debugging of Java code. Experience Issues Related to the JDK Description. However, it cannot be used to create new programs. It is a package of everything necessary to run a compiled Java program, including the Java Virtual Machine (JVM), the Java Class Library, the java command, and other infrastructure.
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