1:
2: public class UnknownOpException extends Exception
3: {
4: public UnknownOpException( )
5: {
6: super("UnknownOpException");
7: }
8: public UnknownOpException(char op)
9: {
10: super(op + " is an unknown operator.");
11: }
12: public UnknownOpException(String message)
13: {
14: super(message);
15: }
16: }