Question

Say I have an ArrayList of custom object, such as

class fileOjb
{
    String path;
    String format;
    int size;
    int dateadd;
}

How should I sort it by
– path, format, size or dateadded?

Thanks!

Answer 1

Here is the code example.for sorting by dateAdded.
for sorting by other properties..you have to first decide your criteria.
(what is criteria for String path1 to be greater than path2)

public class MyComparableByDateAdded implements Comparator<fileOjb>{

    @Override
    public int compare(fileOjb o1, fileOjb o2) {
        return (o1.dateAdd>o2.dateAdd ? -1 : (o1.dateAdd==o2.dateAdd ? 0 : 1));
    }
}

Collections.sort(list, new MyComparableByDateAdded());