Click here to watch in Youtube :
https://www.youtube.com/watch?v=PSftLa7dmCY&list=UUhwKlOVR041tngjerWxVccw
TreeMapExample.java
Output
https://www.youtube.com/watch?v=PSftLa7dmCY&list=UUhwKlOVR041tngjerWxVccw
TreeMapExample.java
import java.util.TreeMap; /* * Example of containsKey(Object key) 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 true if this map contains a mapping for the specified key. */ boolean isKeyExist = treeMap.containsKey(2); System.out.println("isKey '2' Exist : " + isKeyExist); isKeyExist = treeMap.containsKey(8); System.out.println("isKey '8' Exist : " + isKeyExist); } }
treeMap : {1=Cat, 2=Dog, 3=Ball, 4=Apple} isKey '2' Exist : true isKey '8' Exist : false
https://sites.google.com/site/javaee4321/java-collections/TreeMapDemoContainsKey.zip?attredirects=0&d=1
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