Unless otherwise specified, passing a null argument to any method or constructor in this class will cause a {@link NullPointerException} to be thrown.
Constructs an instance of this class with the unknown conversion.params Unknown conversion if (s == null) throw new NullPointerException(); this.s = s;
if (s == null) throw new NullPointerException(); this.s = s;
Returns the unknown conversion.returnThe unknown conversion. return s;
return s;
return String.format("Conversion = '%s'", s);