Fixing Popular Error : “kotlin could not find the required jdk tools in the java installation. make sure kotlin compilation is running on a jdk, not jre.”

If you’re a Kotlin developer, you may have come across the following error message: “kotlin could not find the required jdk tools in the java installation. make sure kotlin compilation is running on a jdk, not jre.” This error message can be frustrating, especially if you’re not sure how to fix it. In this blog, we’ll explore what this error means and how you can fix it.

What does the error message mean?

The error message “kotlin could not find the required jdk tools in the java installation. make sure kotlin compilation is running on a jdk, not jre” means that Kotlin cannot find the necessary JDK (Java Development Kit) tools in your Java installation. The JDK is required for Kotlin compilation because it contains tools such as the Java compiler and the Java Virtual Machine (JVM). The error message is telling you that you’re trying to compile Kotlin on a JRE (Java Runtime Environment), which does not contain the necessary JDK tools.

How to fix the error?

To fix this error, you need to ensure that Kotlin compilation is running on a JDK, not a JRE. Here are some steps you can take to fix the error:

1. Check if JDK is installed: The first step is to check if you have JDK installed on your system. You can do this by opening a terminal or command prompt and typing “java -version”. This will display the version of Java that is installed on your system. If it displays “Java(TM) SE Runtime Environment”, then you only have a JRE installed, and you need to install a JDK.
2. Install JDK: If you don’t have a JDK installed, you can download it from the official Java website. Make sure you download the appropriate version for your operating system.
3. Set the JAVA_HOME environment variable: Once you have installed JDK, you need to set the JAVA_HOME environment variable to point to the JDK installation directory. To do this, open the terminal or command prompt and type “echo %JAVA_HOME%”. If it returns nothing, you need to set the variable. On Windows, you can set the variable by going to the System Properties > Advanced > Environment Variables and adding a new variable called JAVA_HOME with the JDK installation directory as its value. On Linux or macOS, you can set the variable in the terminal by typing “export JAVA_HOME=/path/to/jdk”.
4. Update the PATH environment variable: You also need to update the PATH environment variable to include the JDK bin directory. To do this, add “%JAVA_HOME%\bin” to the PATH variable on Windows or “$JAVA_HOME/bin” on Linux or macOS.
5. Test Kotlin compilation: Finally, test if Kotlin compilation is running on a JDK by typing “kotlinc -version” in the terminal or command prompt. This should display the Kotlin version and the JDK version it’s running on.

Conclusion:

The “kotlin could not find the required jdk tools in the java installation. make sure kotlin compilation is running on a jdk, not jre” error message is a common error that Kotlin developers may face. It’s caused by Kotlin compilation running on a JRE instead of a JDK. To fix the error, you need to ensure that JDK is installed, set the JAVA_HOME environment variable, update the PATH environment variable, and test Kotlin compilation. With these steps, you can ensure that your Kotlin code compiles without any errors

Advice

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