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NavigableMap pollLastEntry() method in Java
The NavigableMap pollLastEntry() method remove and returns a key-value mapping associated with the greatest key in this map.
Let us first create a NavigableMap and add some elements to it −
NavigableMap<Integer, String> n = new TreeMap<Integer, String>(); n.put(5, "Tom"); n.put(9, "John"); n.put(14, "Jamie"); n.put(1, "Tim"); n.put(4, "Jackie"); n.put(15, "Kurt"); n.put(19, "Tiger"); n.put(24, "Jacob");
Now, use the following method −
n.pollLastEntry();
The following is an example to implement the pollLastEntry() method −
Example
import java.util.*;
public class Demo {
public static void main(String[] args) {
NavigableMap<Integer, String> n = new TreeMap<Integer, String>();
n.put(5, "Tom");
n.put(9, "John");
n.put(14, "Jamie");
n.put(1, "Tim");
n.put(4, "Jackie");
n.put(15, "Kurt");
n.put(19, "Tiger");
n.put(24, "Jacob");
System.out.println("NavigableMap elements...
"+n);
System.out.println("
Removed (last) key-value is "+n.pollLastEntry());
System.out.println("
Updated NavigableMap elements...
"+n);
}
}Output
NavigableMap elements...
{1=Tim, 4=Jackie, 5=Tom, 9=John, 14=Jamie, 15=Kurt, 19=Tiger, 24=Jacob}
Removed (last) key-value is 24=Jacob
Updated NavigableMap elements...
{1=Tim, 4=Jackie, 5=Tom, 9=John, 14=Jamie, 15=Kurt, 19=Tiger}
Updated on: 30-Jul-2019
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