exception

I'm new to java and got an exception problem...if an exception occurs in my programme i must print the output "can't execute", but with using a new exception: throw new IllegalArgumentException();

Code:

---

try{
...
..
}
catch(NumberFormatException e) {
        throw new IllegalArgumentException();
}

---

Where and how do i have to define this IllegalArgumentException so that it can print a certain message??

The Sun tutorials show you one way to perform an output upon a thrown exception. There's also another way(as stated in the API for IllegalArgumentException - yes, exceptions have an API page too :) ) which is not much different from your existing code:

Code:

---

...
  throw new IllegalArgumentException("Exception: cannot execute.");
...

---

Pretty easy, right? ;)

Tnx Capt :)...but...it seems i didn't define my problem well enough...here goes.. i'll put a part of my programme here...i made a few classes... one extends the other...

Code:

---

public class GeometricFigure{

        private String name;
               
        public GeometricFigure(String ime) {
                this.ime = ime;
        }
       
       
        public String getName() {
                return this.name;
        }
       

}

---

Code:

---

public class Line extends GeometricFigure {
       
        public Line(int x0, int y0, int x1, int y1) {//coordinates
                super("Line");
                this.x0 = x0;
                this.y0 = y0;
                this.x1 = x1;
                this.y1 = y1;
        }
...
..
..       
        [I]public static GeometricFigure fromStringArray(String[] params) throws IllegalArgumentException{
        try{
                int arg_x0 = Integer.parseInt(params[0]);
                int arg_y0 = Integer.parseInt(params[1]);
                int arg_x1 = Integer.parseInt(params[2]);
                int arg_y1 = Integer.parseInt(params[3]);
               
                return new Line(arg_x0, arg_y0, arg_x1, arg_y1);
        }[B]
        catch(NumberFormatException e)
            {
        throw new IllegalArgumentException();
        }[/B]
       
        }[/I]
}

---

how can i make the bolded part print "Exception" when i call for example
GeometricFigure figure = Line.fromStringArray(subarray); from some other function from somewhere (one of the elements of subarray is a string).
... how to make it work ... help :confused:

EDIT: anyone...?