Added till 18th

TreeSet18b.java

@@ -0,0 +1,16 @@
+// write a java code to demonstrate treeset
+import java.util.*;
+public class TreeSet18b {
+	public static void main(String args[]){
+		TreeSet<String> home = new TreeSet<String>();
+		home.add("Hall Room");
+		home.add("Bed Room");
+		home.add(null);
+		home.add("Bed Room");
+		home.add("Kitchen");
+		Iterator<String> itr = home.iterator();
+		while(itr.hasNext()){
+			System.out.println(itr.next());
+		}
+	}
+}