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I would like to the list to be sorted on the basis of the employeeID of Employee class. How can I do it?

+1 vote
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If an Employee class is present and its objects are added in an arrayList.

posted Sep 22, 2013 by Vivek Singh

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please avoid your homework question

2 Answers

+2 votes

1.Implement Comparable interface for the Employee class and override the compareTo(Object obj) method in which compare the employeeID of person
2.Then call Collections.sort() method and pass that list as an argument.

Now consider that Employee class is a jar file.
1.Since Comparable interface cannot be implemented, create Comparator and override the compare(Object obj, Object obj1) method .
2.Call Collections.sort() on the list and pass comparator as an argument

answer Sep 23, 2013 by Arvind Singh
+1 vote

Treeset will be a better DS to use for this usecase.

answer Oct 1, 2013 by Vikalp Kumar
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