exception handling - Why am I receiving the error: "must be caught or declared thrown java"? -

my current code:

class throwdemo {     static void throwmethod()     {         system.out.println("inside throwmethod");         throw new illegalaccessexception("demo");     }     public static void main(string args[])     {         try         {             throwmethod();         }         catch(illegalaccessexception e)         {             system.out.println("caught"+e);         }     } } 

upto knowledge exception thrown throwmethod must caught. why illegalaccessexception thrown throwmethod not caught catch?