Throws

In some situations methods can cause exceptions which can be handle by throws clause by including it in the method declaration as follows

type method-name(parameter-list) throws exception-list

{

// body of method

}

exception-list---these are the list of exceptions that method can throw, except Error, Run-time Exceptions and its sub classes all the exceptions that method can throw should be declared in this list which are separated by comma.

// example for throws clause.
public class ThrowsDemo
{
 static void throwOne() throws IllegalAccessException //should throws the exception throw in method.
 {
 System.out.println("Inside throwOne.");
 throw new IllegalAccessException("demo");  //to catch this exception try catch should be used  in main() method
 }

  public static void main(String args[]) 
  {
 try 
 {
 throwOne();
 } 
    catch (IllegalAccessException e) 
    {
 System.out.println("Caught " + e);
 }
 }
}

Output:

Inside throwOne.

Caught java.lang.IllegalAccessException: demo