Why Does Eclipse Show \'No Compiler is Provided\'?

Compiler Error: Running on a JRE Instead of JDK

When compiling projects in Eclipse using m2eclipse, users may encounter the error "No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?" This indicates that the project is attempting to compile with a Java Runtime Environment (JRE), which lacks the compilation capabilities of a Java Development Kit (JDK).

To resolve this issue, follow these steps:

1. Navigate to Eclipse's Window > Preferences.
2. Select Java > Installed JREs.
3. Ensure that a JDK is installed and select it as shown below:

4. Click OK.
5. Right-click on the project and select Maven > Update Project.

Additionally, verify the Maven JRE settings by following these steps:

1. Access the Run Configurations window through the Run menu.
2. Select the Maven Build configuration.
3. Navigate to the JRE tab and ensure that Workspace default JRE is selected.

By performing these steps, Eclipse will recognize the installed JDK and allow you to compile projects successfully.

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