Click here to watch in Youtube :
https://www.youtube.com/watch?v=dNNF2asoAQs&list=UUhwKlOVR041tngjerWxVccw
TreeMapExample.java
Output
https://www.youtube.com/watch?v=dNNF2asoAQs&list=UUhwKlOVR041tngjerWxVccw
TreeMapExample.java
import java.util.TreeMap; /* * Example of firstKey() method. */ public class TreeMapExample { public static void main( String[] args ) { TreeMap<Integer, String> treeMap = new TreeMap<Integer, String>(); treeMap.put(10, "Cat"); treeMap.put(50, "Dog"); treeMap.put(30, "Apple"); treeMap.put(40, "Ball"); treeMap.put(20, "Ball"); System.out.println("treeMap : " + treeMap + "\n"); /* * Returns the first (lowest) key currently in this map. */ Integer firstKey = treeMap.firstKey(); System.out.println("firstKey : " + firstKey); } }
treeMap : {10=Cat, 20=Ball, 30=Apple, 40=Ball, 50=Dog} firstKey : 10
https://sites.google.com/site/javaee4321/java-collections/TreeMapDemoFirstKey.zip?attredirects=0&d=1
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