sort treeset in ascending order java code example
Example 1: sort treeset in descending order using comparator
import java.util.TreeSet;
public class Main {
public static void main(String[] args) {
TreeSet<Object> treeSet = new TreeSet<Object>();
treeSet.add(45);
treeSet.add(15);
treeSet.add(99);
treeSet.add(70);
treeSet.add(65);
treeSet.add(30);
treeSet.add(10);
treeSet.add(60);
treeSet.add(80);
System.out.println("TreeSet\n" + treeSet);
TreeSet<Object> res = (TreeSet<Object>)treeSet.descendingSet();
System.out.println("TreeSet after sorting in descending order\n" + res);
}
}
Example 2: treeset java descending order using comparator
TreeSet<Integer> set = new TreeSet<Integer>(new Comparator<Integer>()
{
public int compare(Integer i1,Integer i2)
{
return i2.compareTo(i1);
}
});