#Java array sort comparator how to#

* sort(T a, int fromIndex, int toIndex, Comparator c) */Īrrays.sort(intSortArrayMixedMode, pivotPosition, intSortArrayMixedMode.length, objSortArray. * Arrays.sort(int a, int fromIndex, int toIndex) */Īrrays.sort(intSortArrayMixedMode, 0, pivotPosition) ('Descending order from element ' + (pivotPosition + 1) + ' to ' + intSortArrayMixedMode.length) ('Ascending order from element 1 to ' + pivotPosition) Int pivotPosition = intSortArrayMixedMode.length / 2 You can use a reverse Comparator or Collections.reverseOrder() method to sort an object array in descending order e.g. * Sort k+1th position to nth/last in Descending order If it is not sorted, the results are undefined. * Sort 1st/first position to kth in Ascending order The array must be sorted into ascending order according to the specified comparator (as by the sort(T, Comparator) method) prior to making this call. sort array of characters in the order of occurrence within a string. Array Sorting Using A Comparator in Java.

This is passed in as a second parameter in the sort () method so that the sorted array can be rearranged in descending order. To sort an array in descending order, we used the reverseOrder () method provided by the Collections class.

#Java array sort comparator how to#

This is my Comparator so far: class StringSorter. Sorting with Comparable and Comparator in Java Comparable or Comparatorwhich should it be Learn how to choose the correct interface for the sorting algorithm you need. The sort () method takes in the array to be sorted as a parameter. * Use Comparator to sort Array in Descending order */Īrrays.sort(intSortArrayDescending, paratorDescending()) So Im trying to sort a String Array using a Comparator but the sorting is based on the length of String then on the third Character of the String. SortArray objSortArray = new SortArray() Its worth understanding code for future interview of yours. In addition this question was asked in leading Multi National Company(MNC). We will sort Array in Ascending, Descending and Mixed mode(1st/first to kth in Ascending order and k+1th to nth/last in Descending order, you can choose different position for 1st,kth and nth). class provides many options for sorting an Array.