throw throws

what is the difference btwn throw and throws?

throw is used normally like this
throw new Exception(). This throws a new Exception wich must be catched or passed further to the calling class or method.
throws is used in the method signature. This tells the compiler that this method doesn't take care of the given exception but simply passes it to the caller. So every class/method which calls that method must either catch this exception or itself throws it.

Throw:
Before you can catch an exception, some Java code somewhere must throw one. Any Java code can throw an exception: your code, code from a package written by someone else (such as the packages that come with the Java development environment), or the Java runtime system. Regardless of who (or what) throws the exception, it's always thrown with the Java throw statement.
Throws:
this can be used to inform JRE that this method may throw some type of exception.
Example:
public Object pop() throws EmptyStackException {
Object obj;
if (size == 0)
throw new EmptyStackException();
obj = objectAt(size - 1);
setObjectAt(size - 1, null);
size--;
return obj;
}

Ravi

throw - a command to "throw an exception"
throws - a declarative statement stating that "this method throws an exception"

throw - is a verb
throws - is an action verb

If I may throw

in my 2 cents here ...
You may only "throw" objects, whereas "throws" is a declaration, and thus can only be defined by a class.
That is, you declare a function to throw a type (class) of object with the "throws" keyword, but when the time comes to actually throw an object of that class, you do so with the "throw" keyword.
public void throwMe() throws Exception /* <-- that's a class */ {
throw new Exception(); // <--- that's an object
}
Wow, I think that will even compile.