Java NavigableMap.headMap(K toKey)
Syntax
NavigableMap.headMap(K toKey) has the following syntax.
SortedMap < K , V > headMap(K toKey)
Example
In the following code shows how to use NavigableMap.headMap(K toKey) method.
/*from w w w . ja v a2 s .c o m*/
import java.util.NavigableMap;
import java.util.TreeMap;
public class Main {
public static void main(String[] args) {
NavigableMap<Integer, String> map = new TreeMap<Integer, String>();
map.put(2, "two");
map.put(1, "one");
map.put(3, "three");
System.out.println( map.headMap(1) + "\n");
}
}
The code above generates the following result.
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