对象java列表上的Collections.sort

Question

I'm need to make sure i understand correctly someone else code at work this block sort this object: theObjectList by the variable getId() what do i need to do in order to add another variable to the sorting ? for example getName()

    protected void fillData(List<AnyObject> theObjectList) {
        Collections.sort(theObjectList, (A, B) -> A.getId() - B.getId());
/*  more code */
}

Answer 1

You can use Comparators.comparing

Collections.sort(theObjectList, 
                 Comparator.comparing(x -> x.getId()).andThen(x -> x.getName()));

Answer 2

Believe you'd need to understand and pickup lambda expressions. They have been introduced since jdk8 .