Click here to watch in Youtube :
https://www.youtube.com/watch?v=lW6LMFO1DLA&list=UUhwKlOVR041tngjerWxVccw
TreeMapExample.java
Output
https://www.youtube.com/watch?v=lW6LMFO1DLA&list=UUhwKlOVR041tngjerWxVccw
TreeMapExample.java
import java.util.Set; import java.util.TreeMap; /* * Example of keySet() method. */ public class TreeMapExample { public static void main( String[] args ) { TreeMap<Integer, String> treeMap = new TreeMap<Integer, String>(); treeMap.put(1, "Cat"); treeMap.put(2, "Dog"); treeMap.put(4, "Apple"); treeMap.put(3, "Ball"); System.out.println("treeMap : " + treeMap + "\n"); /* * Returns a Set view of the keys contained in this map. The set is * backed by the map, so changes to the map are reflected in the set, * and vice-versa. * * If the map is modified while an iteration over the set is in progress * (except through the iterator's own remove operation), the results of * the iteration are undefined. The set supports element removal, which * removes the corresponding mapping from the map, via the * Iterator.remove, Set.remove, removeAll, retainAll, and clear * operations. It does not support the add or addAll operations. */ Set<Integer> set = treeMap.keySet(); System.out.println("set : " + set + "\n"); System.out.println("-----------------------"); System.out.println("Key" + " | " + "value"); System.out.println("-----------------------"); for( Integer key : set ) { String value = treeMap.get(key); System.out.println(key + " | " + value); } } }
treeMap : {1=Cat, 2=Dog, 3=Ball, 4=Apple} set : [1, 2, 3, 4] ----------------------- Key | value ----------------------- 1 | Cat 2 | Dog 3 | Ball 4 | Apple
https://sites.google.com/site/javaee4321/java-collections/TreeMapDemoKeyandValue.zip?attredirects=0&d=1
See also:
Ram,
ReplyDeleteExcellent Tutorials. Do you have any plans for Spring and Hibernate Framework?
Thanks
Anantha
Thanks for the feedback :) ... yes I am planning to do...
Delete