Null Pointer Exception while using Java Compiler API

by

I got the same error. Maybe I am too late to answer this question, but I share my own experiences, it might help someone else facing the same issue in the future. I was playing around with the source code at Compile Java Files At Runtime.

I was getting java.lang.NullPointerException as it is mentioned. I printed out the Java home directory with System.out.println(System.getProperty("java.home"));, and noticed my Eclipse was pointing to “C:\Program Files\Java\jre7” even after I changed my preferences to use JDK1.7 instead of JRE1.7.

I found a workaround by forcing the usage of JDK1.7 by setting system property like this:

System.setProperty("java.home", "C:\\Program Files\\Java\\jdk1.7.0_02");

Then I compiled my program and did not get any NullPointerException.

More Related Contents:

  1. Android, NullPointerException
  2. What is a NullPointerException, and how do I fix it?
  3. Why is my Spring @Autowired field null?
  4. NullPointerException accessing views in onCreate()
  5. Which @NotNull Java annotation should I use?
  6. Returning null as an int permitted with ternary operator but not if statement
  7. NullPointerException in Java with no StackTrace
  8. Compile code fully in memory with javax.tools.JavaCompiler [duplicate]
  9. java.lang.NullPointerException is thrown using a method-reference but not a lambda expression
  10. Error invoke virtual method ‘double android.location.Location.getLatitude()’ on a null object reference
  11. JavaFX Location is not set error message [duplicate]
  12. Filter values only if not null using lambda in Java8
  13. Why does int num = Integer.getInteger(“123”) throw NullPointerException?
  14. How do you tell if a checkbox is selected in Selenium for Java?
  15. How to set classpath when I use javax.tools.JavaCompiler compile the source?
  16. Android: Pass data(extras) to a fragment
  17. Why static fields are not initialized in time?
  18. When is it OK to catch NullPointerException?
  19. Why does null reference print as “null”
  20. Java conditional operator ?: result type
  21. JPA/Hibernate Static Metamodel Attributes not Populated — NullPointerException
  22. Apache POI – FileInputStream works, File object fails (NullPointerException)
  23. Spring Boot – Environment @Autowired throws NullPointerException
  24. Why can I throw null in Java? [duplicate]
  25. java.lang.NullPointerException: Attempt to invoke virtual method on a null object reference [duplicate]
  26. Is Catching a Null Pointer Exception a Code Smell?
  27. NullPointerException stack trace not available without debug agent
  28. Gracefully avoiding NullPointerException in Java
  29. Attempt to invoke virtual method ‘void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)’ on a null object reference
  30. No Exception while type casting with a null in java

Leave a Comment