If i write things like this :

public static void main(String[] args) { try { } catch (MalformedURLException e) { e.printStackTrace() }; } 

Java compiler shows compilation error at catch clause of MalformedURLException. If i insert line URL url = new URL("HI"); in try block , complaining stops. I thought java must be binding these checked exceptions with package. Then i tried another class of java.net package by inserting " CookieManager manager = new CookieManager(); " only in try block. Compilation error again starts.

So how does JVM bind these checked exceptions with java classes for compilation time errors like this?