Java rules for casting

When can a certain object be cast into another object? Does the casted object have to be a subtype of the other object? I’m trying to figure out the rules…

Edit: I realized that I didn’t explain my issue at all: basically I am casting an object to an interface type. However, at run-time, I get a java.lang.ClassCastException. What needs to happen with my object so that I can cast it to this interface? Does it have to implement it?

Thanks

Related Posts:

  1. Convert String to double in Java
  2. Converting double to integer in Java
  3. How do I copy an object in Java?
  4. Java Undefined Object
  5. Convert an integer to an array of characters : java
  6. How to identify object types in java
  7. If Java is Strongly typed then why does this code compile?
  8. How to sort an array of objects in Java?
  9. How to sort an array of objects in Java?
  10. Error: Generic Array Creation
  11. How to pass an object from one activity to another on Android
  12. How to cast ArrayList<> from List<>
  13. Convert boolean to int in Java
  14. Java get String CompareTo as a comparator object
  15. How to cast ArrayList<> from List<>
  16. Why cannot cast Integer to String in java?
  17. Java Runtime Environment not found error when I open an application
  18. “PKIX path building failed” and “unable to find valid certification path to requested target”
  19. What exactly does a jar file contain?
  20. What is the best way to implement constants in Java?
  21. What is the reason behind “non-static method cannot be referenced from a static context”?
  22. What does ” || ” mean in Java? [duplicate]
  23. “Error occurred during initialization of VM; Could not reserve enough space for object heap” using -Xmx3G
  24. “int cannot be dereferenced” in Java
  25. What is a Key-Value Pair?
  26. Understanding Spring @Autowired usage
  27. What is a serialVersionUID and why should I use it?
  28. SLF4J: Failed to load class “org.slf4j.impl.StaticLoggerBinder”
  29. The difference between += and =+
  30. exception in initializer error in java when using Netbeans
  31. error upon assigning Layout: BoxLayout can’t be shared
  32. Why do this() and super() have to be the first statement in a constructor?
  33. Else without if
  34. Keytool is not recognized as an internal or external command
  35. Cannot find “Package Explorer” view in Eclipse
  36. Error: Could not find or load main class in intelliJ IDE
  37. Java Hashmap: How to get key from value?
  38. Understanding the difference between null and ‘\u000’ in Java
  39. what does Dead Code mean under Eclipse IDE Problems Section
  40. Java compressing Strings
  41. Can an abstract class have a constructor?
  42. org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when ‘hibernate.dialect’ not set
  43. “NoClassDefFoundError: Could not initialize class” error
  44. Recursive print Factorial
  45. SSL peer shut down incorrectly in Java
  46. Java split string to array
  47. How can I clear or empty a StringBuilder?
  48. Generate a random double in a range
  49. Eclipse “Error: Could not find or load main class”
  50. How to get locator of current web element?
  51. javax.naming.NameNotFoundException
  52. How to print out all the elements of a List in Java?
  53. Error: cannot find symbol ArrayList
  54. Resize an Array while keeping current elements in Java?
  55. Access restriction: The type ‘Application’ is not API (restriction on required library rt.jar)
  56. Assign the negativeCntr with the number of negative values in the linked list
  57. intellij incorrectly saying no beans of type found for autowired repository
  58. Web server failed to start. Port 8080 was already in use. Spring Boot microservice
  59. No Persistence provider for EntityManager named
  60. What does it mean: JavaFX application class must extend javafx.application.Application?
  61. Using Math.round to round to one decimal place?
  62. How to replace a substring of a string
  63. accessing a variable from another class
  64. “Javac” doesn’t work correctly on Windows 10
  65. Java – get the current class name?
  66. Warning: The method assertEquals from the type Assert is deprecated
  67. koch snowflake java recursion
  68. Java word count program
  69. How to return a boolean method in java?
  70. Java read file and store text in an array
  71. MultipartException: Current request is not a multipart request
  72. How to extract a substring using regex
  73. .class vs .java
  74. Case expressions must be constant expressions for static final int?
  75. try catch ArrayIndexOutOfBoundsException?
  76. Response has aready been committed
  77. How do I test a class that has private methods, fields or inner classes?
  78. How to use regex in String.contains() method in Java
  79. Error: Module not specified (IntelliJ IDEA)
  80. Checking letter case (Upper/Lower) within a string in Java
  81. How to swap String characters in Java?
  82. Exception in thread “main” java.net.ConnectException: Connection refused: connect Socket Programming Java
  83. Why is there no multiple inheritance in Java, but implementing multiple interfaces is allowed?
  84. Resource leak: ‘in’ is never closed
  85. JavaFX and OpenJDK
  86. What’s the difference between JPA and Hibernate?
  87. Java console program
  88. “Source folder is not a Java project” error in eclipse
  89. How to memory profile in Java?
  90. java.lang.IllegalThreadStateException
  91. What is an method in Java? Can it be overridden?
  92. The sum of all squares between 1 and 100 inclusive?
  93. How do I initialize a byte array in Java?
  94. How to map a composite key with JPA and Hibernate?
  95. Javac “cannot find symbol”
  96. Difference between volatile and synchronized in Java
  97. How can I read a text file in Android?
  98. compilation error: identifier expected
  99. Setting background images in JFrame
  100. Can’t seem to disable Java Automatic Update

Leave a Comment

tech