Java Language Java LinkedHashMap class


Example

Key Points:-

  • Is Hash table and Linked list implementation of the Map interface, with predictable iteration order.

  • inherits HashMap class and implements the Map interface.

  • contains values based on the key.

  • only unique elements.

  • may have one null key and multiple null values.

  • same as HashMap instead maintains insertion order.

Methods :-

  • void clear().
  • boolean containsKey(Object key).
  • Object get(Object key).
  • protected boolean removeEldestEntry(Map.Entry eldest)

Example :-

public static void main(String arg[])
    {
        LinkedHashMap<String, String> lhm = new LinkedHashMap<String, String>();
        lhm.put("Ramesh", "Intermediate");
        lhm.put("Shiva", "B-Tech");
        lhm.put("Santosh", "B-Com");
        lhm.put("Asha", "Msc");
        lhm.put("Raghu", "M-Tech");
        
        Set set = lhm.entrySet();
        Iterator i = set.iterator();
        while (i.hasNext()) {
            Map.Entry me = (Map.Entry) i.next();
            System.out.println(me.getKey() + " : " + me.getValue());
        }
                
        System.out.println("The Key Contains : " + lhm.containsKey("Shiva"));
        System.out.println("The value to the corresponding to key : " + lhm.get("Asha"));    
    }