Forked from tejainece/LinkedHashMapValueByIndexArray.java
Created
May 11, 2018 14:41
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Get element by index in LinkedHashMap
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import java.util.LinkedHashMap; | |
import java.util.Map; | |
import java.util.Set; | |
public class LinkedHashMapValueByIndexArray { | |
public static void main(String []args){ | |
LinkedHashMap<String, Integer> map = new LinkedHashMap<String, Integer>(); | |
map.put("Qatar", 98814); | |
map.put("Luxembourg", 78670); | |
map.put("Singapore", 64584); | |
map.put("Norway", 54947); | |
map.put("Brunei", 53431); | |
map.put("United States", 53101); | |
map.put("Hong Kong", 52722); | |
map.put("Switzerland", 46430); | |
Set<Map.Entry<String, Integer>> mapSet = map.entrySet(); | |
Map.Entry<String, Integer> elementAt5 = (Map.Entry<String, Integer>) mapSet.toArray()[5]; | |
System.out.println(elementAt5.getKey()); | |
} | |
} |
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import java.util.LinkedHashMap; | |
import java.util.Map; | |
import java.util.Set; | |
import java.util.ArrayList; | |
public class LinkedHashMapValueByIndexArrayList { | |
public static void main(String []args){ | |
LinkedHashMap<String, Integer> map = new LinkedHashMap<String, Integer>(); | |
map.put("Qatar", 98814); | |
map.put("Luxembourg", 78670); | |
map.put("Singapore", 64584); | |
map.put("Norway", 54947); | |
map.put("Brunei", 53431); | |
map.put("United States", 53101); | |
map.put("Hong Kong", 52722); | |
map.put("Switzerland", 46430); | |
Set<Map.Entry<String, Integer>> mapSet = map.entrySet(); | |
Map.Entry<String, Integer> elementAt5 = (new ArrayList<Map.Entry<String, Integer>>(mapSet)).get(5); | |
System.out.println(elementAt5.getKey()); | |
} | |
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import java.util.LinkedHashMap; | |
import java.util.Map; | |
import java.util.Set; | |
import java.util.ArrayList; | |
import java.util.Iterator; | |
public class LinkedHashMapValueByIndexIterate { | |
public static void main(String []args){ | |
LinkedHashMap<String, Integer> map = new LinkedHashMap<String, Integer>(); | |
map.put("Qatar", 98814); | |
map.put("Luxembourg", 78670); | |
map.put("Singapore", 64584); | |
map.put("Norway", 54947); | |
map.put("Brunei", 53431); | |
map.put("United States", 53101); | |
map.put("Hong Kong", 52722); | |
map.put("Switzerland", 46430); | |
Set<Map.Entry<String, Integer>> mapSet = map.entrySet(); | |
Iterator<Map.Entry<String, Integer>> ite = mapSet.iterator(); | |
int n = 5; | |
while(n-- > 0) { | |
if(ite.hasNext()) { | |
ite.next(); | |
} | |
} | |
if(n == -1 && ite.hasNext()) { | |
System.out.println(ite.next().getKey()); | |
} | |
} | |
} |
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