import treemap java code example

Example 1: TreeMap headMap() method in java

import java.util.SortedMap;
import java.util.TreeMap;
public class TreeMapHeadMapMethodExample
{
   public static void main(String[] args)
   {
      TreeMap<String, Integer> tm = new TreeMap<String, Integer>();
      // map string values to integer keys
      tm.put("mango", 65);
      tm.put("apple", 63);
      tm.put("grapes", 35);
      tm.put("pineapple", 60);
      tm.put("banana", 26);
      System.out.println("Given TreeMap is: " + tm);
      // create SortedMap for map head
      SortedMap<String, Integer> sm = new TreeMap<String, Integer>();
      sm = tm.headMap("pineapple");
      // Getting map head
      System.out.println("headmap is: " + sm);
   }
}

Example 2: java treemap

import java.util.*;

// Declare the variable using the interface of the object for flexibility.
// Non-primative data types only.
Map<Integer, String> mambo = new TreeMap<Integer, String>();

mambo.put(key, value);
// TreeMap will be sorted by key.
// Work with any comparable object as a key.

mambo.put(1, "Monica");
mambo.put(2, "Erica");
mambo.put(3, "Rita");