{"id":12102,"date":"2023-01-25T08:04:59","date_gmt":"2023-01-25T08:04:59","guid":{"rendered":"https:\/\/www.prepbytes.com\/blog\/?p=12102"},"modified":"2023-04-18T08:25:32","modified_gmt":"2023-04-18T08:25:32","slug":"throw-and-throws-in-java","status":"publish","type":"post","link":"https:\/\/prepbytes.com\/blog\/throw-and-throws-in-java\/","title":{"rendered":"Throw and Throws in Java"},"content":{"rendered":"

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Throw and Throws in Java are two important keywords that are used for implementing the concept of Exception Handling. Here we will learn about the Throw and Throws in Java in detail. Before delving into the topic of Throw and Throws in Java, let us about Exception and Exception Handling in Brief.<\/p>\n

What is an Exception?<\/h2>\n

An exception is an unfavorable condition that occurs while a program is running. It refers to errors that arise when there is a problem in the code being executed. For example, when a number is divided by zero ArithmeticException is thrown. In java, we can throw an exception on our own.<\/p>\n

But why would anyone want to throw an exception on their own?<\/p>\n

Imagine a user is asked to enter their age as input. We know that the age of a person can only be a positive number. So, if the user enters a negative or zero value as their age, we may throw an exception.<\/p>\n

There can be more cases where the input entered by the user is considered invalid for our program. In those cases, we can manually throw an exception.<\/p>\n

What is Exception Handling in Java?<\/h2>\n

Exception Handling in Java is one of the effective ways to handle errors that occur at run time so that the regular flow of the program can be preserved. Java Exception Handling is a process that deals with errors occurring during runtime, such as SQLException, ArrayIndexOutOfBoundsException, ClassNotFoundException, IOException, and more. It is a technique used in Java programming to detect and manage these types of errors.<\/p>\n

What are Throw and Throws in Java?<\/h2>\n

Throw<\/strong> and Throws<\/strong> in Java would seem similar having only a difference in tenses. But, these two are very distinct from each other and are used to do different tasks. Throw and Throws in java are simple keywords used in exception handling.<\/p>\n

What is throw in Java?<\/h3>\n

The throw keyword<\/strong> in java is used to throw an exception manually and logically defined by the programmer during the execution of a program, the control moves from one block to another with the assumption that the exception of the error is defined and handled accordingly.<\/p>\n

Syntax of Throw in Java is shown below:<\/strong><\/p>\n

throw throwableObject;<\/code><\/pre>\n
A throwable object can be an instance or subclass of the Throwable class. All exceptions defined in Java are subclasses of Throwable.<\/p>\n
Implementation of Throw in Java:<\/strong>
\nHere is a simple Java program to help understanding how to use Throw<\/strong> in Java.<\/p>\n\t\t\t\t\t\t