Java Language
SortedMap

소개

정렬 된 맵 소개.

핵심 :-

• SortedMap 인터페이스는 맵을 확장합니다.
• 항목은 오름차순 키 순서로 유지됩니다.

정렬 된지도 방법 :

• 비교기 비교기 ().
• 객체 firstKey ().
• SortedMap headMap (Object end)입니다.
• Object lastKey ().
• SortedMap subMap (객체 시작, 객체 끝).
• SortedMap tailMap (Object start).

예

public static void main(String args[]) {
      // Create a hash map
      TreeMap tm = new TreeMap();
      
      // Put elements to the map
      tm.put("Zara", new Double(3434.34));
      tm.put("Mahnaz", new Double(123.22));
      tm.put("Ayan", new Double(1378.00));
      tm.put("Daisy", new Double(99.22));
      tm.put("Qadir", new Double(-19.08));
      
      // Get a set of the entries
      Set set = tm.entrySet();
      
      // Get an iterator
      Iterator i = set.iterator();
      
      // Display elements
      while(i.hasNext()) {
         Map.Entry me = (Map.Entry)i.next();
         System.out.print(me.getKey() + ": ");
         System.out.println(me.getValue());
      }
      System.out.println();
      
      // Deposit 1000 into Zara's account
      double balance = ((Double)tm.get("Zara")).doubleValue();
      tm.put("Zara", new Double(balance + 1000));
      System.out.println("Zara's new balance: " + tm.get("Zara"));
   }