Error

In this post, we will see how to fix Unsupported class file major version 61 in Java. Reason for Unsupported class file major version 61 in Java You will get this error when you have compiled the class with Java 17(major version 17) and you are trying to run class file under lower java version […]

In this post, we will see how to fix java.lang.ClassCastException: java.util.Arrays$ArrayList cannot be cast to java.util.ArrayList. ClassCastException is runtime exception which indicate that code has tried to cast an object to a subclass which is not an instance. Reason for java.lang.ClassCastException: java.util.Arrays$ArrayList cannot be cast to java.util.ArrayList Although static method Arrays.asList() returns List, it returns […]

In this post, we will see how to fix error java.util.HashMap$Values cannot be cast to class java.util.List. Why HashMap values cannot be cast to list? HashMap values returns java.util.Collection and you can not cast Collection to List or ArrayList. It will throw ClassCastException in this scenario. Let’s understand with the help of example: [crayon-63ddf5e744de0276190067/] Output: […]

In this article, we will see how to fix Unable to obtain LocalDateTime from TemporalAccessor in Java 8. Unable to obtain LocalDateTime from TemporalAccessor : Reason You will generally get this error, when you try to convert String to LocalDateTime and Formatted String does not have time related information. Let’s understand with the help of […]

Learn about how to solve Variable might not have been initialized in Java.

Learn about how to fix class names are only accepted if annotation processing is explicitly requested in java.

Learn about how to fix java.util.InputMismatchException.

Learn about how to resolve uses unchecked or unsafe operations. recompile with -xlint:unchecked for details.

Learn about how to fix uses or overrides a deprecated api in java.