No – none of our previous example programs have done this.
import java.util.* ;
public class Square
{
public static void main ( String[] a )
{
Scanner scan = new Scanner( System.in );
int num ;
System.out.print("Enter an integer: ");
num = scan.nextInt();
System.out.println("The square of " + num + " is " + num*num );
}
}
Above is the example program.
When the program asked for input,
the user entered "rats".
The nextInt() method could not
read that as an integer and
threw an InputMismatchException object.
This program lacks code to deal with Exceptions.
So, when nextInt() threw an Exception,
it went to the Java virtual machine.
Then the Java virtual machine caught the Exception,
stopped the program, and printed a trace
of what went wrong.
Could statements be added to handle this Exception?