TreeMap: headMap(K toKey) : TreeMap « java.util « Java by API






  1. Java by API
  2. java.util
  3. TreeMap

TreeMap: headMap(K toKey)

  
/*
 Output:

Virginia, New York, Massachusetts

 * */

import java.util.TreeMap;

public class MainClass {
  public static void main(String args[]) {
    TreeMap map = new TreeMap();
    map.put("Virginia", "Richmond");
    map.put("Massachusetts", "Boston");
    map.put("New York", "Albany");
    map.put("Maryland", "Annapolis");

    if (!map.isEmpty()) {
      Object last = map.lastKey();
      boolean first = true;
      do {
        if (!first) {
          System.out.print(", ");
        }
        System.out.print(last);
        last = map.headMap(last).lastKey();
        first = false;
      } while (last != map.firstKey());
      System.out.println();
    }
  }
}








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4.TreeMap: get(K k)
5.TreeMap: headMap(K toKey, boolean inclusive)
6.TreeMap: higherKey(K key)
7.TreeMap: lastKey()
8.TreeMap: lowerKey(K key)
9.TreeMap: put(K k, V v)
10.TreeMap: size()
11.TreeMap: subMap(K fromKey, K toKey)
12.TreeMap: tailMap(T fromKey)
13.TreeMap: values()