what does throw keyword do in java code example

Example 1: throw keyword in java

Generally JVM throws the exception and
we handle the exceptions by 
using try catch block. But there are
situations where we have to throw 
userdefined exceptions or runtime exceptions.
  In such case we use throw keyword 
to throw exception explicitly.

  Syntax : throw throwableInstance;

Example 2: throw keyword in java

Generally JVM throws the exception and we handle the exceptions by 
using try catch block. But there are situations where we have to throw 
userdefined exceptions or runtime exceptions. In such case we use throw keyword 
to throw exception explicitly.

  Syntax : throw throwableInstance;

Throwable instance must be of type throwable or any of its subclasses.
After the throw statement execution stops and subsequent statements are not 
executed. Once exception object is thrown JVM checks is there any catch 
block to handle the exception. If not then the next catch statement till it 
finds the appropriate handler. If appropriate handler is not found, 
then default exception handler halts the program and prints the description 
and location of exception. In general we use throw keyword for throwing 
userdefined or customized exception.