Error: Module not specified (IntelliJ IDEA)

This is because the className value which you are passing as argument for
forName(String className) method is not found or doesn’t exists, or you a re passing the wrong value as the class name. Here is also a link which could help you.

1. https://docs.oracle.com/javase/7/docs/api/java/lang/ClassNotFoundException.html
2. https://docs.oracle.com/javase/7/docs/api/java/lang/Class.html#forName(java.lang.String)

Update

Module not specified

According to the snapshot you have provided this problem is because you have not determined the app module of your project, so I suggest you to choose the app module from configuration. For example:

Related Posts:

  1. Lombok and Maven
  2. Error: Could not find or load main class in intelliJ IDE
  3. unused import statement for used ones in IntelliJ IDEA
  4. Error: JavaFX runtime components are missing, and are required to run this application with JDK 11
  5. How to fix “unsupported class file major version 60” in IntelliJ?
  6. intellij incorrectly saying no beans of type found for autowired repository
  7. JAVA_HOME should point to a JDK not a JRE
  8. IDEA: javac: source release 1.7 requires target release 1.7
  9. IntelliJ – Can’t start – “JAVA_HOME does not point to a valid JVM installation”
  10. Correct way to add external jars (lib/*.jar) to an IntelliJ IDEA project
  11. Invalid signature file digest for Manifest main attributes exception while trying to run jar file
  12. “Cannot start compilation: the output path is not specified for module…”
  13. intellij idea – Error: java: invalid source release 1.9
  14. String index out of bounds exception java
  15. Class JavaLaunchHelper is implemented in two places
  16. IntelliJ IDEA “The selected directory is not a valid home for JDK”
  17. javac is not recognized as an internal or external command, operable program or batch file [closed]
  18. What is a StackOverflowError?
  19. How to uninstall Eclipse?
  20. How do I determine whether an array contains a particular value in Java?
  21. How can I solve Exception in thread “main” java.lang.NullPointerException error [duplicate]
  22. Why am I getting a NoClassDefFoundError in Java?
  23. How to avoid “ConcurrentModificationException” while removing elements from `ArrayList` while iterating it? [duplicate]
  24. Using Pairs or 2-tuples in Java [duplicate]
  25. What’s the C++ version of Java’s ArrayList
  26. Bad Operand Types for Binary Operator “>”?
  27. Error occurred during initialization of boot layer FindException: Module not found
  28. Why would a “java.net.ConnectException: Connection timed out” exception occur when URL is up?
  29. ‘mvn’ is not recognized as an internal or external command, operable program or batch file
  30. How to use multiple classes in java in one file?
  31. Java: Multiple class declarations in one file
  32. Why do JVM arguments start with “-D”?
  33. How to split a string in Java
  34. Printing out a linked list using toString
  35. Received fatal alert: handshake_failure through SSLHandshakeException
  36. Understanding the difference between null and ‘\u000’ in Java
  37. How do you make a deep copy of an object?
  38. what does Dead Code mean under Eclipse IDE Problems Section
  39. java, get set methods
  40. How to solve DB2 SQL Error: SQLCODE=-407, SQLSTATE=23502
  41. Javadoc @see or {@link}?
  42. Remote debugging a Java application
  43. What’s the difference between next() and nextLine() methods from Scanner class?
  44. How to identify object types in java
  45. What is the result of making log4j additivity equals to true or false?
  46. Attempt to invoke virtual method ‘…’ on a null object reference
  47. how to fix EXE4J_JAVA_HOME, No JVM could be found on your system error?
  48. Error: ‘else’ without ‘if’
  49. How to create a custom exception type in Java?
  50. Extracting .jar file with command line
  51. UnsatisfiedDependencyException: Error creating bean with name
  52. Change priorityQueue to max priorityqueue
  53. Only using @JsonIgnore during serialization, but not deserialization
  54. Cannot change version of project facet Dynamic Web Module to 3.0?
  55. InvalidKeyException Illegal key size
  56. Collections.emptyMap() vs new HashMap()
  57. java howto ArrayList push, pop, shift, and unshift
  58. java.lang.ArithmeticException: / by zero
  59. How can I convert a .jar to an .exe?
  60. How to fix “error: bad operand types for binary operator ‘||’ ” in java
  61. “The system cannot find the file C:\ProgramData\Oracle\Java\javapath\java.exe”
  62. Counting an Occurrence in an Array (Java)
  63. When is the finalize() method called in Java?
  64. Java “user.dir” property – what exactly does it mean?
  65. it throws me error incompatible types: unexpected return value — return 10; please correct it make note where i am doing wrong code?
  66. Caused by: java.security.UnrecoverableKeyException: Cannot recover key
  67. How can I truncate a double to only two decimal places in Java?
  68. How do I add a simple jQuery script to WordPress?
  69. I get the error int cannot be converted to boolean?c
  70. Can’t install JDK 9 because “Another Java installation is in progress”
  71. How can I check if a single character appears in a string?
  72. Java Error – Illegal Modifier for Parameter – Only final Permitted
  73. Fatal error compiling: tools.jar not found:
  74. Java: Increment by 2 the two inputted integer
  75. Sending mail error, javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25;
  76. Cannot issue data manipulation statements with executeQuery()
  77. Why do some classes require main methods and others do not?
  78. java.util.IllegalFormatConversionException
  79. What do F and D mean at the end of numeric literals?
  80. What is the best Java email address validation method?
  81. Set Date in a single line
  82. why android studio show error of “Missing constraints in constraintlayout”?
  83. Change the size of a JTextField inside a JBorderLayout
  84. java.lang.ArrayIndexOutOfBoundsException: 0
  85. What’s wrong with overridable method calls in constructors?
  86. what is the difference between doGet() and doPost() in term of the flow?
  87. Java 3D Game Engine?
  88. How to cast ArrayList<> from List<>
  89. Using insertion sort for descending order?
  90. What is the home directory for JDK?
  91. java.lang.ClassNotFoundException: org.postgresql.Driver, Android
  92. Javadoc @author tag good practices
  93. A fatal error has been detected by the Java Runtime Environment: SIGSEGV, libjvm
  94. java.lang.IllegalStateException: Failed to introspect Class
  95. ShoppingCart.Java Program Assignment
  96. White spaces are required between publicId and systemId
  97. Http status 401 This request requires HTTP authentication (). in tomcat 6
  98. Get integer value of the current year in Java
  99. How to make the division of 2 ints produce a float instead of another int?
  100. Java Console Prompt for ENTER input before moving on [duplicate]

Leave a Comment