package devmanuals.com; import java.util.*; public class SizeOfTreeSet { public static void main(String[] args) { TreeSet st = new TreeSet(); st.add("Gyan"); st.add("Rohit"); st.add("Anand"); st.add("Arunesh"); System.out.println("the size of the tree set is :"+st.size()); st.remove("Gyan"); System.out.println("the size of the tree set after removing is :"+st.size()); } }