How to use SortedMap interface in Java?

Question

I have a

 Map

What is the best way to keep the map sorted according to the float?

Is SortedMap

Answer 1

A TreeMap is probably the most straightforward way of doing this. You use it exactly like a normal Map. i.e.

Map mySortedMap = new TreeMap();
// Put some values in it
mySortedMap.put(1.0f,"One");
mySortedMap.put(0.0f,"Zero");
mySortedMap.put(3.0f,"Three");

// Iterate through it and it'll be in order!
for(Map.Entry entry : mySortedMap.entrySet()) {
    System.out.println(entry.getValue());
} // outputs Zero One Three 

It's worth taking a look at the API docs, http://download.oracle.com/javase/6/docs/api/java/util/TreeMap.html to see what else you can do with it.