Using a sorted map...

[Greg Walker]

Can anyone show me an easy example of storing items in a sorted map? (The java tutorial is kinda confusing)

[Tim LeMaster]

    
import java.util.Iterator;
import java.util.SortedMap;
import java.util.TreeMap;
 
public class UseSortMap
{
public static void main(String[] argv)
{
SortedMap map = new TreeMap();

map.put("foo", "foo");
map.put("bar", "bar");
map.put("zed", "zed");
map.put("alpha", "alpha");

Iterator i = map.keySet().iterator();

while (i.hasNext())
{
String key = (String)i.next();
String value = (String)map.get(key);

System.out.println(key + ":" + value);
}
}
}
 

Produces the output

alpha:alpha
bar:bar
foo:foo
zed:zed

[Greg Walker]

Now what if I wanted to do a one-to-many mapping, such as a group name <K> mapped to group numbers <V>, in which the values will be stored in a List?

[Ilja Preuss]

http://jakarta.apache.org/commons/collections/apidocs/org/apache/commons/collections/map/MultiValueMap.html