treemap containskey 28 29 method in java

1import java.util.TreeMap;
2public class TreeMapContainsKeyMethodExample
3{
4   public static void main(String[] args)
5   {
6      TreeMap<Integer, String> tm = new TreeMap<Integer, String>();
7      // map String values to Integer keys
8      tm.put(56, "orange");
9      tm.put(62, "indigo");
10      tm.put(43, "red");
11      tm.put(91, "green");
12      tm.put(38, "yellow");
13      System.out.println("TreeMap before using containsKey() method: " + tm);
14      // check for key element '62'
15      System.out.println("Does key '62' present? " + tm.containsKey(62));
16      // check for key element '90'
17      System.out.println("Does key '90' present? " + tm.containsKey(90));
18   }
19}

1map Integer values to String Keys
2import java.util.TreeMap;
3public class TreeMapContainsKeyMethodExample
4{
5   public static void main(String[] args)
6   {
7      TreeMap<String, Integer> tm = new TreeMap<String, Integer>();
8      // Mapping Integer values to string keys
9      tm.put("violet", 18);
10      tm.put("red", 12);
11      tm.put("violet", 14);
12      tm.put("green", 16);
13      tm.put("blue", 20);
14      System.out.println("Given TreeMap Mappings are: " + tm);
15      // check for key element 'green'
16      System.out.println("Is key 'green' present? " + tm.containsKey("green"));
17      // checking for key element 'yellow'
18      System.out.println("Is key 'yellow' present? " + tm.containsKey("yellow"));
19   }
20}