java

Throw And Throws Exception in Java

Throw

Throw is a keyword that is used in Java to declare an exception which is similar to the try/catch block. It is used to declare an explicit exception inside a block of code or method.

Example

public class AgeCheck {
 void checkAge(int age) {
  if(age < 18){
   throw new ArithmeticException("Not eligible to vote");
  }else {
   System.out.println("Eligible to vote");
  }
 }

public static void main(String args[]){
//Create an object of the class to access the method
AgeCheck ageCheck = new AgeCheck();
ageCheck.checkAge(13) //Not eligible to vote
}
}

Throws

Throws is a keyword also as well as a method signature used to declare an exception which might be thrown by the method during the program execution.

public class DivisionCheck {
 int divide(int a, int b) throws ArithmeticException {
 int result = a/b;
 return result;
 }
public static void main(String args[]){
//Create an object of the class to access the method
 DivisionCheck divisionCheck = new DivisionCheck();
 try {
  System.out.println(divisionCheck.divide(15,0));
 }catch(ArithmeticException e){
  System.out.println("You cannot divide by zero);
 }
}
}

Throws is usually used to check the process of program execution, especially when you are not sure of the input you might get from the user.

THE END.

Recent Posts

How to Dynamically Create, Update, and Delete HTML Elements

In modern web development, dynamically manipulating HTML elements is essential for creating interactive and responsive…

4 days ago

Why parseInt(’09’) Returns 0

If you've ever encountered the puzzling behavior of parseInt('09') returning 0 in JavaScript, you're not…

1 week ago

Event Bubbling and Capturing: Why Your Click Listener Fires Twice (And How to Fix It)

If you’ve ever built an interactive web application, you may have encountered a puzzling issue:…

2 weeks ago

Practical Array Methods for Everyday Coding

Arrays are the backbone of programming, used in nearly every application. Whether you're manipulating data,…

2 weeks ago

What the Heck Is the Event Loop? (Explained With Pizza Shop Analogies)

If you've ever tried to learn JavaScript, you’ve probably heard about the "Event Loop"—that mysterious,…

3 weeks ago

Why [] === [] Returns false in JavaScript (And How to Properly Compare Arrays & Objects)

JavaScript can sometimes behave in unexpected ways, especially when comparing arrays and objects. If you've…

3 weeks ago