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Error

  • Core java Error
    25 October

    [Fixed] Unsupported Class File Major Version 61 in Java

    1. Introduction Java developers often face the challenge of compatibility issues, such as the unsupported class file major version 61" error. This problem arises when a Java program, compiled with Java 17 (denoted by major version 61), is run on a Java version that’s older than Java 17. This guide is crafted to be beginner-friendly […]

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  • java.lang.ClassCastException: java.util.Arrays$ArrayList cannot be cast to java.util.ArrayList
    Core java Error Java Collections
    22 February

    [Fixed] java.lang.ClassCastException: java.util.Arrays$ArrayList cannot be cast to java.util.ArrayList

    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 […]

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  • HashMap values cannot be cast to list
    Core java Error
    21 February

    [Fixed] java.util.HashMap$Values cannot be cast to class java.util.List

    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-681debd75928e406898880/] Output: […]

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  • Unable to obtain LocalDateTime from TemporalAccessor
    Core java Error Java 8
    20 February

    [Fixed] Unable to obtain LocalDateTime from TemporalAccessor

    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 […]

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  • Error
    15 April

    [Solved] Variable might not have been initialized in Java

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

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  • Error
    30 December

    [Solved] Class names are only accepted if annotation processing is explicitly requested

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

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  • Error
    30 December

    [Solved] Exception in thread “main” java.util.InputMismatchException

    Learn about how to fix java.util.InputMismatchException.

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  • Error
    29 December

    [Solved] uses unchecked or unsafe operations. recompile with -xlint:unchecked for details.

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

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  • Error
    29 December

    [Fixed] uses or overrides a deprecated api. recompile with -xlint:deprecation for details.

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

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