Most build tools look for JAVA_HOME to find the JDK. If this points to your JRE folder, it will fail to find tools.jar .

The tools.jar file is a critical component for Java 8 development, yet it is often the source of frustrating "Could not find tools.jar" errors. Because this file was removed in Java 9 and later versions, developers working on legacy Java 8 projects must ensure it is correctly installed and configured.

Contains the full development suite, including the compiler ( javac ) and the essential tools.jar library. Where to Download Java 8 tools.jar

If you have already installed the JDK but still see the error in tools like , Eclipse , or Gradle , follow these steps: 1. Set your JAVA_HOME Variable

Where to get the tools.jar to use with the Java 8 jdk early release

The primary reason you might be looking for a tools.jar download is that your system is currently pointing to a instead of a Java Development Kit (JDK) .

Once the JDK is installed, you can find the file at: C:\Program Files\Java\jdk1.8.x_xx\lib\tools.jar (Windows). How to Fix "Could not find tools.jar" Errors