Sorting List By Comparator

[nazeer hussain]

Hi

I have a code to sort the object list by a specific attribute as follows.

public GenericComparator(String field, String order) {
super();
this.fieldName=field;
if (order == null || order.equals(ASC)){
this.sortOrder=ASC;
} else if (order.equals(DESC)){
this.sortOrder=DESC;
}

}

public int compare(Object o1, Object o2) {
Object value1;
Object value2;
try{
Field f = this.getAccessibleField(o1);

if (f == null) return 0;

if (this.sortOrder.equals(ASC)){
value1 = f.get(o1);
value2 = f.get(o2);
} else {
value2 = f.get(o1);
value1 = f.get(o2);

}

return this.compareField( value1, value2);
}catch (Exception nsfe){
System.out.println(nsfe);
return 0;
}

}


But I want to sort the objects after calculating a ratio of two different attributes in the objects in object list.

Please give me an idea.

Thanks in advance

Nazeer

[Campbell Ritchie]

You have already had a useful reply on the beginners' forum.

A Comparator doesn't return a ratio, unless you have done lots of arithmetic in it.