Java by API/java.util/SortedMap

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SortedMap: firstKey()

   <source lang="java">

import java.util.Calendar; import java.util.Locale; import java.util.Map; import java.util.NavigableMap; import java.util.TreeMap; public class Main {

 public static void main(String args[]) {
   Calendar now = Calendar.getInstance();
   Locale locale = Locale.getDefault();
   Map<String, Integer> names = now.getDisplayNames(Calendar.DAY_OF_WEEK, Calendar.LONG, locale);
   NavigableMap<String, Integer> nav = new TreeMap<String, Integer>(names);
   System.out.printf("Whole list:%n%s%n", nav);
   System.out.printf("First key: %s\tFirst entry: %s%n", nav.firstKey(), nav.firstEntry());
 }

}

 </source>
   
  
 
  



SortedMap: lastKey()

   <source lang="java">

import java.util.Calendar; import java.util.Locale; import java.util.Map; import java.util.NavigableMap; import java.util.TreeMap; public class Main {

 public static void main(String args[]) {
   Calendar now = Calendar.getInstance();
   Locale locale = Locale.getDefault();
   Map<String, Integer> names = now.getDisplayNames(Calendar.DAY_OF_WEEK, Calendar.LONG, locale);
   NavigableMap<String, Integer> nav = new TreeMap<String, Integer>(names);
   System.out.printf("Whole list:%n%s%n", nav);
   System.out.printf("Last key: %s\tLast entry: %s%n", nav.lastKey(), nav.lastEntry());
 }

}

 </source>