treemap java

1import java.util.SortedMap;
2import java.util.TreeMap;
3public class TreeMapHeadMapMethodExample
4{
5   public static void main(String[] args)
6   {
7      TreeMap<Integer, String> tm = new TreeMap<Integer, String>();
8      // map string values to integer keys
9      tm.put(65, "mango");
10      tm.put(63, "apple");
11      tm.put(35, "grapes");
12      tm.put(60, "pineapple");
13      tm.put(26, "banana");
14      System.out.println("Given TreeMap is: " + tm);
15      // create SortedMap for map head
16      SortedMap<Integer, String> sm = new TreeMap<Integer, String>();
17      sm = tm.headMap(60);
18      // Getting map head
19      System.out.println("headmap is: " + sm);
20   }
21}

1import java.util.Map;
2import java.util.TreeMap;
3public class TreeMapExample
4{
5   public static void main(String[] args) 
6   {
7      TreeMap<Integer, String> tm = new TreeMap<Integer, String>();    
8      tm.put(1000, "Apple");    
9      tm.put(1002, "Raspberry");    
10      tm.put(1001, "Velvet apple");    
11      tm.put(1003, "Banana");    
12      for(Map.Entry obj : tm.entrySet())
13      {    
14         System.out.println(obj.getKey() + " " + obj.getValue());    
15      }
16   }
17}

1import java.util.*;
2
3// Declare the variable using the interface of the object for flexibility.
4// Non-primative data types only.
5Map<Integer, String> mambo = new TreeMap<Integer, String>();
6
7mambo.put(key, value);
8// TreeMap will be sorted by key.
9// Work with any comparable object as a key.
10
11mambo.put(1, "Monica");
12mambo.put(2, "Erica");
13mambo.put(3, "Rita");

1- TreeMap doesn't have null key and keys are sorted
2 Can contain only unique keys and keys are sorted in ascending order.
3

1TreeMap<Integer, String> x = new TreeMap<Integer, String>();    
2tm.put(1, "Hello");

1TreeSet: Can contain only unique values and it is sorted in ascending order
2TreeMap: Can contain only unique keys and keys are sorted in ascending order.
3