How to sort ArrayList in java, Sorting java Collections

let us see how to sort values in java collections, List/ArrayList.  We can achieve this by using Collections class, Collections class contains a method sort(Collection Object), just give your collection object to the sort() method that’s it, consider this example….

SortCollection.java

package java4s; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.List; public class SortCollection { public static void main(String... args) { List li = new ArrayList(); li.add("India"); li.add("United States"); li.add("Malaysia"); li.add("Australia"); li.add("Lundon"); Collections.sort(li); for(String temp: li) { System.out.println("Countries : "+temp); } } }

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package java4s; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.List; public class SortCollection {     public static void main(String... args)     {             List li = new ArrayList();             li.add("India");             li.add("United States");             li.add("Malaysia");             li.add("Australia");             li.add("Lundon");             Collections.sort(li);             for(String temp: li)             {                 System.out.println("Countries : "+temp);             }     } }

Output

Countries : Australia
Countries : India
Countries : Lundon
Countries : Malaysia
Countries : United States