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.

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