the+java_home+environment+nb:java_home+should+point+to+a+jdk+not+a+jre

the `JAVA_HOME` environment variable is used to specify the location of the Java Development Kit (JDK) on your system. It should point to the root directory of the JDK installation, not the Java Runtime Environment (JRE).

The JDK is required for developing Java applications, as it includes tools such as the Java compiler (`javac`) and other utilities. The JRE, on the other hand, is only needed for running Java applications.

To set the `JAVA_HOME` environment variable, you can follow these steps:
1. Determine the installation directory of your JDK.
2. Open the System Properties window on your operating system.
3. Go to the "Advanced" tab and click on the "Environment Variables" button.
4. In the "System Variables" section, click on the "New" button.
5. Enter `JAVA_HOME` as the variable name and the path to your JDK installation directory as the variable value.
6. Click "OK" to save the changes.

Make sure to restart any open command prompts or IDEs for the changes to take effect. By correctly setting the `JAVA_HOME` environment variable, you ensure that your system uses the correct JDK for Java development.