Java SortedMap.headMap(K toKey)
Syntax
SortedMap.headMap(K toKey) has the following syntax.
SortedMap < K , V > headMap(K toKey)
Example
In the following code shows how to use SortedMap.headMap(K toKey) method.
//from www.j a va 2 s . c om
import java.util.SortedMap;
import java.util.TreeMap;
public class Main {
public static void main(String[] args) {
SortedMap<String, Integer> sortedMap = new TreeMap<String, Integer>();
sortedMap.put("A", 1);
sortedMap.put("B", 2);
sortedMap.put("C", 3);
sortedMap.put("D", 4);
sortedMap.put("E", 5);
sortedMap.put("java2s", 6);
SortedMap<String, Integer> map = sortedMap.headMap("C");
System.out.println(map);
}
}
The code above generates the following result.
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