Removing trailing zeros from java.math.BigDecimal produces infinite loop

[code]
 /**
     * Trim all trailing zeros found after the decimal point of {@link
java.math.BigDecimal}
     * @param n {@link java.math.BigDecimal}
     * @return n {@link java.math.BigDecimal}
     * <a href="http://groups.google.com/group/
comp.lang.java.programmer/browse_frm/thread/5ad5a973fcbf442b/
52012c87f1051dd5?lnk=st&q=removing+trailing+zeros
+java&rnum=2&hl=en#52012c87f1051dd5">more information</a>
     */
    public static BigDecimal trim(BigDecimal n) {
        try {
            while (true) {
                n = n.setScale(n.scale() - 1);
            }
        } catch (ArithmeticException e) {} // DO NOTHING NO MORE
TRAILING ZEROS FOUND
        return n;
    }
[/code]

This method is supposed to remove any and all trailing zeroes from a
given java.math.BigDecimal parameter n and return it "trimmed".

However, if n < 1 or n > -1 the method goes into an infinite loop.
Not sure how to patch this method to prevent this from occurring from
this condition. What tips do you have to prevent this from occurring?
I thought of BigDecimal.ROUND_HALF_UP, but to no avail.

Thanx
Phil