How to Fix Eclipse Error: 'No Java (JRE) / (JDK) ... No Virtual Machine Found'?

Eclipse Error: "No Java (JRE) / (JDK) ... No Virtual Machine Found"

Eclipse requires a Java Runtime Environment (JRE) or Java Development Kit (JDK) to function. When this error message appears, it signifies that no Java environment has been detected. This issue can arise due to several reasons.

Firstly, ensure that you have both the JDK and SDK installed correctly. Even if installed before, fresh installations are recommended to rectify any potential corruption.

Next, verify the Eclipse configuration. By default, Eclipse utilizes the first Java executable specified in the PATH environmental variable. To ensure proper functioning, specify the latest JRE path directly in your eclipse.ini file or copy the JRE to your /jre directory, bypassing the need for PATH updates.

Additionally, differentiate between the Java environments used to launch Eclipse and within Eclipse itself. While a JRE suffices for starting Eclipse, registering a JDK is essential for project-related tasks like debugging and compilation. Notably, different Java environments can be registered within Eclipse, allowing for flexibility in running and testing applications under various conditions.

In rare cases, system inconsistences may prevent the error message from being resolved. Users have encountered success by manually editing the eclipse.ini file to specify the Java path explicitly, as Eclipse ignores the PATH variable when a value is provided in eclipse.ini.

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