TreeMap Sorting - Java

[Odc]

Hi all!

Is there anyway to sort a TreeMap via it's keys and values? The keys are strings and values are integers. I wish to sort via the highest value, and then the key alphabetically

For example,

treemap.put("test", 5);
treemap.put("hello", 5);
treemap.put("face", 1);
treemap.put("lol", 8);

How can I make the output

lol - 8
hello - 5
test - 5
face - 1

At the moment, it just sorts the keys alphabetically.

[benjus]

I'm haven't worked with Java for ages - I'm more of a C++/C# guy. But as a general data structures question, I'd say a map isn't the ideal structure for this sort of thing - can you use a TreeSet and define an object that contains both the number and the string, and define the ordering that you want on that object?

Of course, if you need to be able to look up elements by the string only this approach won't help.

[Odc]

I created another tree map and defined a comparator for it, then copied all the elements from the original map into the new one. All sorted !

[yamangman]

According to a 5 second look at the docs TreeMap has a constructor accepting a type implementing the interface Comparator that is used for ordering. Is this not what you want? Do you actually need 2 instances of TreeMap?