Error:Cannot determine path to 'tools.jar' library for 21(2)(C:/Program Files/Java/jdk-21)

### JDK 21 Tools.jar Path Configuration Error Solution In modern versions of Java Development Kit (JDK), including JDK 21, `tools.jar` has been deprecated and removed as part of modularization efforts introduced with Java 9. Instead of relying on `tools.jar`, developers should use the appropriate modules provided by the JDK. To resolve issues related to missing or undefined paths for `tools.jar` in JDK 21: #### Use Modularized APIs Directly Instead of referencing classes from `tools.jar`, applications can now directly depend on specific JDK modules that provide equivalent functionality. For example, compiler-related functionalities are available through the `jdk.compiler` module[^1]. ```java import jdk.compiler.com.sun.tools.javac.api.JavacTool; ``` Ensure project dependencies correctly specify required modules via build tool configurations like Maven or Gradle. #### Update Build Tool Configurations For projects using Apache Maven, update the POM file to include necessary dependency management without referring to external JAR files such as `tools.jar`. Similarly, adjust Gradle scripts accordingly. Maven Example: ```xml <dependencies> <!-- Compiler plugin configuration --> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.0</version> <configuration> <source>21</source> <target>21</target> </configuration> </plugin> </plugins> </build> ``` Gradle Example: ```groovy apply plugin: 'java' tasks.withType(JavaCompile) { options.release = 21 } ``` By adopting these practices, compatibility concerns associated with older development environments utilizing `tools.jar` will be mitigated effectively while ensuring seamless integration with newer JDK releases.