import java.util.TreeMap; public class Main { public static void main(String[] args) { TreeMap<String,String> treeMap = new TreeMap<String,String>(); treeMap.put("1", "One"); treeMap.put("2", "Two"); treeMap.put("3", "Three"); Object obj = treeMap.remove("2"); System.out.println(obj + " Removed from TreeMap"); } }