An exception is an event that occurs during the execution of programs. … Throw keyword is used to explicitly throw an exception. Generally, throw keyword is used to throw user defined exceptions.
exception handling is built upon three keywords: try, catch, and throw.
In simple Way try is used for RISKY CODE where a programmes can think that There may be a chance Of occurring Exception then Programmer will use try block and if there is any Exception occurs like (Division /O) then it will Throw that exception to CATCH block and Catch is use to verify exception type and Handle It. #Every try must have atleast 1 Catch or finally or Both.. #Throws block never handle any exception It only Delegate the Exception to Main method or Caller method..
Try – Catch: Syntax
try
{
//Protected code
}catch(ExceptionName e1)
{
//Catch block
}
The throw keyword will allow you to throw an exception (which will break the execution flow and can be caught in a catch block). The throws keyword in the method prototype is used to specify that your method might throw exceptions of the specified type.
Throw: Syntax
public class TestThrow1{
static void validate(int age){
if(age<18)
throw new ArithmeticException(“not valid”);
else
System.out.println(“welcome to vote”);
}
public static void main(String args[]){
validate(21);
System.out.println(“rest of the code…”);
}
To know more in detail about Exception Handling inC++, Java and Python.
Join class at TCCI Computer Coaching in Bopal and Satellite in Ahmedabad.
Online Computer Coaching also available for all computer course.
Call us @ 9825618292
Visit us @ http://tccicomputercoaching.com/
tccicomputercoaching 