Jul 23, 2025 · How to solve this error? In order to avoid java.lang.IllegalStateException in Java main Thread we must ensure that any method in our code cannot be called at an illegal or an …

Signals that a method has been invoked at an illegal or inappropriate time. In other words, the Java environment or Java application is not in an appropriate state for the requested operation.

Nov 24, 2013 · Usually, IllegalStateException is used to indicate that "a method has been invoked at an illegal or inappropriate time." However, this doesn't look like a particularly typical use of it.

Jul 5, 2024 · An IllegalStateException is a runtime exception in Java that is thrown to indicate that a method has been invoked at an illegal or inappropriate time. To use an analogy, invoking a …

Nov 12, 2025 · In the Java programming language, exceptions play a crucial role in handling errors and unexpected situations. One such exception is the `IllegalStateException`. This …

Feb 2, 2024 · This tutorial demonstrates what is java.lang.IllegalStateException in Java and when it occurs.

The IllegalStateException is a runtime exception that is thrown when a method is invoked at an illegal or inappropriate time or if the object is in an inappropriate state.

Learn how to fix IllegalStateException blocking in Java with this detailed tutorial. Discover practical solutions and coding best practices.

Oct 16, 2025 · This exception typically arises when there is an attempt to convert a value from one type to another, but the conversion is not possible due to various reasons. Understanding …

Learn how to resolve Java IllegalStateException by checking object state and preconditions. Actionable solutions for developers.