How to get element position from Java Map

Question

I have this Java Map:

Can you tell me how I can get the 6-th element of the Map?

private static final Map cache = new HashMap<         


        

Answer 1

HashMaps do not preserve ordering:

LinkedHashMap which guarantees a predictable iteration order.

Example

public class Users 
{
 private String Id;

 public String getId()
 {
    return Id;
 }

 public void setId(String id) 
 {
    Id = id;
 }
}


Users user;
LinkedHashMap linkedHashMap = new LinkedHashMap();

for (int i = 0; i < 3; i++)
{
  user = new Users();
  user.setId("value"+i);
  linkedHashMap.put("key"+i,user);
}

/* Get by position */
int pos = 1;
Users value = (new ArrayList(linkedHashMap.values())).get(pos);
System.out.println(value.getId());