Difference Between Throw And Throws And Throwable In Java
Understanding Java Exception Handling: throw vs throws vs Throwable
Difference Between Throw And Throws And Throwable In Java
In Java, “throw” is a keyword used to explicitly throw an exception within a method, interrupting the normal flow of the program. “throws,” on the other hand, is part of a method declaration used to indicate that the method may throw a specific type of exception. When a method is declared with “throws,” it means that the method itself does not handle the exception but rather passes it to the calling code. In terms of “Throwable,” it is the parent class of all exceptions and errors in Java, providing a common superclass for handling exceptions. Subclasses of Throwable include Exception (checked exceptions that must be caught or declared to be thrown) and RuntimeException (unchecked exceptions that do not need to be caught or declared).
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1 - `throw` is a keyword in Java used to explicitly throw an exception within a method. It is followed by an instance of an exception that needs to be thrown.
2) `throws` is used in method signatures to declare the exceptions that a method might throw to the calling method. It specifies the exceptions that a method can throw, allowing the calling method to handle these exceptions.
3) `Throwable` is the superclass of all exceptions and errors in Java. All exceptions and errors are subclasses of Throwable. This class provides common methods and properties that are inherited by its subclasses.
4) When using `throw`, you are explicitly raising an exception at a specific point in your code to handle exceptional situations.
5) The `throws` keyword is used in method signatures to indicate that the method might throw an exception, allowing the calling method to anticipate and handle the potential exceptions.
6) The `Throwable` class provides common methods such as `getMessage()` and `printStackTrace()` that can be used to obtain information about the exception.
7) The `throw` keyword allows you to create custom exceptions and throw them based on specific conditions in your code.
8) When a method declares that it `throws` an exception, it specifies the types of exceptions that the method might produce during execution.
9) `Throwable` class is directly extended by two subclasses: `Exception` (for exceptional conditions that programs should catch) and `Error` (for exceptional conditions that are not expected to be caught by programs).
10) Learning about `throw`, `throws`, and `Throwable` in Java is essential for understanding how exceptions and error handling work in Java programs. It helps developers write more robust and reliable code.
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