A narrowing conversion is a conversion from a larger numeric type to a smaller numeric type. : Type Casting « Type Casting « SCJP

1. SCJP
2. Type Casting
3. Type Casting

//Narrowing conversions require the cast operator.
//Casting enables numeric conversions that would not be allowed by the compiler. 
public class MainClass{
    public static void main(String[] argv){
        long l = 100000000L;
        short s = (short)l;
        System.out.println();
    }
}