[Judas]

mutator methods change values. when i learned it methods didnt have those gay names ... not sure why they are necessary.

getSomething() <- access

setSomething() <- mutate

so all its asking you to do is to redefine that method so that you can set refnumber to whatever you want ( a string in this case ) in other methods , classes, and the main method.

not sure what all the variables are in the class but

public void setRefNumber (String ref)
{
refnumber = ref;
}

public String getRefNumber()
{
return refNumber;
}