throw vs throws
throw :
The throw keyword in Java is an essential part of exception handling. It allows you to create and throw exceptions explicitly within your code when specific conditions or situations arise. This can be useful for signaling exceptional circumstances that need to be handled further up the call stack.
Creating Exception syntax:
throw new SomeException("An error occurred");
Catching and Handling Exceptions:
To handle exceptions that you throw using the throw keyword, you use try-catch blocks. A catch block specifies the type of exception it can handle and provides the code to execute when that exception occurs.
try-catch exception handling:
try {
// Some code that might throw an exception
} catch (SomeException ex) {
// Code to handle the exception
}
throws :In Java, the throws keyword is used as part of a method declaration to indicate that the method might throw one or more types of exceptions. It provides information to the caller of the method about the exceptions that the method might generate, which helps the caller handle those exceptions appropriately.
throws method declaration syntax:
public ReturnType methodName(parameters) throws ExceptionType1, ExceptionType2 {
// Method code that might throw exceptions
}
throws exception handling:When a method is declared with a throws clause, any code that calls this method needs to either handle the declared exceptions using try-catch blocks or declare the same exceptions in its own throws clause. This ensures that the exceptions are either caught and handled at an appropriate level or propagated further up the call stack.
throws exception handling code example:
public void callingMethod() {
try {
someMethod(); // May throw ExceptionType1 or ExceptionType2
} catch (ExceptionType1 ex1) {
// Handle ExceptionType1
} catch (ExceptionType2 ex2) {
// Handle ExceptionType2
}
}
throw vs throws :throw: It's used to forcefully create and throw a specific exception instance within a method.
throws: It's used in a method signature to indicate that the method might throw specific types of
exceptions, making it necessary for the caller to handle or declare those exceptions.
