TreeMap(Comparator <? super K > comparator) constructor from TreeMap has the following syntax.
public TreeMap(Comparator <? super K> comparator)
In the following code shows how to use TreeMap.TreeMap(Comparator <? super K > comparator) constructor.
import java.util.Collections; import java.util.TreeMap; //from www .java 2s .c om public class Main { public static void main(String[] args) { TreeMap<Integer, String> db = new TreeMap<Integer, String>(Collections.reverseOrder()); db.put(1000, "1000"); db.put(1011, "1011"); db.put(1102, "1102"); db.put(2023, "2023"); db.put(2034, "2034"); System.out.println(db); } }
The code above generates the following result.