1: //UnknownOpException.java
2:
3: public class UnknownOpException extends Exception
4: {
5: public UnknownOpException( )
6: {
7: super("UnknownOpException");
8: }
9:
10: public UnknownOpException(String message)
11: {
12: super(message);
13: }
14:
15: public UnknownOpException(char op)
16: {
17: super(op + " is an unknown operator.");
18: }
19: }