In this example, we will use Collections.sort() method to sort a list of integers in ascending and descending order in Java.
Sort List of integers using Collections.sort() method
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public class SortList {
public static void main(String[] args) {
// create list
List < Integer > list = new ArrayList < Integer > ();
list.add(10);
list.add(30);
list.add(20);
list.add(50);
list.add(40);
Collections.sort(list); // ascending order
System.out.println(list);
Collections.reverse(list); // descending order
System.out.println(list);
}
}
Output:
[10, 20, 30, 40, 50]
[50, 40, 30, 20, 10]
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