If you are not using Maven or Gradle, you must manually add the JAR to your classpath:
couldn't find aspectjrt.jar on classpath in intellij - Stack Overflow org.aspectj.lang.joinpoint jar download
org.aspectj aspectjrt 1.9.22.1 Use code with caution. Add this to your build.gradle file: implementation 'org.aspectj:aspectjrt:1.9.22.1' Use code with caution. 3. Manual Installation (No Build Tool) If you are not using Maven or Gradle,
Visit Maven Central: org.aspectj:aspectjrt to download the latest .jar file directly. org.aspectj.lang.joinpoint jar download