Arrays Custom Sort The following example shows how to sort any given array using Arrays.sort() API.
The sort functionality is embedded inside custom Comparator . This is
especially useful when we want to sort the same array different fashions.
package com.bethecoder.tutorials.utils.arrays; import java.util.Arrays; import java.util.Comparator; public class ArraysCustomSort { public static void main ( String [] args ) { Rank [] rankList = new Rank [] { new Rank ( 6 ) , new Rank ( 2 ) , new Rank ( 4 ) , new Rank ( 1 ) , new Rank ( 5 ) , new Rank ( 3 ) , new Rank ( 9 ) , new Rank ( 8 ) } ; System.out.println ( "Before sort : " + Arrays.toString ( rankList )) ; Arrays.sort ( rankList, new Comparator<Rank> () { @Override public int compare ( Rank first, Rank second ) { if ( second.getRank () < first.getRank ()) { return 1 ; } else if ( first.getRank () < second.getRank ()) { return - 1 ; } return 0 ; } }) ; System.out.println ( "After sort : " + Arrays.toString ( rankList )) ; } } class Rank { int rank; public Rank ( int rank ) { super () ; this .rank = rank; } public int getRank () { return rank; } public void setRank ( int rank ) { this .rank = rank; } public String toString () { return "Rank[" + rank + "]" ; } }
Before sort : [Rank[6], Rank[2], Rank[4], Rank[1], Rank[5], Rank[3], Rank[9], Rank[8]]
After sort : [Rank[1], Rank[2], Rank[3], Rank[4], Rank[5], Rank[6], Rank[8], Rank[9]]
