Difference between throw and throws

In Java, both throw and throws are used for handling exceptions, but they serve different purposes and are used in different contexts. Here’s a detailed explanation of the differences between throw and throws:

throw

• throw keyword is used to throw an exception explicitly in the code, inside the function or the block of code.

• throw is used to actually throw an exception instance within a method.

• We can use throw when we want to signal that an exception has occurred and handle it somewhere else (such as in a try-catch block).

throws

• throws keyword is used in the method signature to declare an exception which might be thrown by the function while the execution of the code.

• throws is used in a method declaration to specify that the method might throw certain types of exceptions.

• We can use throws in a method declaration to inform the caller that they need to handle or declare the exceptions that this method might throw.

In the above example, throw is used within the move method to explicitly throw an exception, while throws is used in the method signatures to indicate that certain methods may throw exceptions that need to be handled or declared by the caller.