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Get Tail Map from TreeMap in Java
To get Tail Map from TreeMap, use the tailMap() method. It gets a part or view of the map whose keys are greater than equal to the key set as a parameter.
Let us first create a TreeMap −
TreeMap<Integer,String> m = new TreeMap<Integer,String>();
Now, we will add some elements −
m.put(1,"PHP"); m.put(2,"jQuery"); m.put(3,"JavaScript"); m.put(4,"Ruby"); m.put(5,"Java"); m.put(6,"AngularJS"); m.put(7,"ExpressJS");
Get the Tail Map −
m.tailMap(4)
The following is an example to get Tail Map from TreeMap in Java −
Example
import java.util.*; public class Demo { public static void main(String args[]){ TreeMap<Integer,String> m = new TreeMap<Integer,String>(); m.put(1,"PHP"); m.put(2,"jQuery"); m.put(3,"JavaScript"); m.put(4,"Ruby"); m.put(5,"Java"); m.put(6,"AngularJS"); m.put(7,"ExpressJS"); System.out.println("TreeMap Elements...
"+m); System.out.println("Tail Map has: " + m.tailMap(4)); } }
Output
TreeMap Elements... {1=PHP, 2=jQuery, 3=JavaScript, 4=Ruby, 5=Java, 6=AngularJS, 7=ExpressJS} Tail Map has: {4=Ruby, 5=Java, 6=AngularJS, 7=ExpressJS}
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