![]() ![]() Each job takes a single unit of time, so the minimum possible deadline for any job is 1. Given: An array of jobs, where every job has a deadline and an associated profit if the job is completed within the deadline.Task: What are the maximum number of activities that can be performed by a single person, assuming that one person can only work one activity at a time. Given: n activities with their start and end times.If the second object is greater than the first, returns a value If the first object is greater than the second, returns a value > 0.If both the objects are equal, returns 0.The sort method transfers control to the compare method, and compare method returns values based on the arguments passed: Let’s have a look at the code below.Ĭollections.sort(studentName, new Comparator() How Does Collections Sort Work in Java? Sorting in descending order can be done using a comparator too. List studentName = Arrays.asList("Tom","John","Harry","Philip","Max") public static void sort(List studentName) We have a list of student names, and we’ll sort them in ascending order. Let’s take an example to sort the list of elements in ascending order. public static void sort(List list, Comparator c): Sort the list according to the specified comparator.public static void sort(List list): Sort the list into ascending order, the natural ordering of its element.The Collections.sort has two overloaded methods : ![]() Implementation of the Collections Sort Method in Java Collections.sort is used to sort all data structures such as linkedList, ArrayList, and queue. By default, this method sorts the list in ascending order of elements. The sort is guaranteed to be stable, i.e., the order of equal elements after performing sort will remain unchanged. ClassCastException: If the list contains elements that are not mutually comparable using the specified comparator, it will throw ClassCastException. Comparable implementations provide a natural ordering for a class, which allows the object of that class to be sorted properly. How does it happen? String and date both implement the Comparable interface in Java. If it consists of a date element, it will be sorted into chronological order. If a list consists of string elements, then it will be sorted in alphabetical order. All the elements in the list must be mutually comparable.
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