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Remove the last entry of the TreeMap in Java
To remove the last entry of the TreeMap, use the pollLastEntry() method.
Let us first create a TreeMap and add elements
TreeMap<Integer, String> m = new TreeMap<Integer, String>(); m.put(1,"India"); m.put(2,"US"); m.put(3,"Australia"); m.put(4,"Netherlands"); m.put(5,"Canada");
Remove the last entry now
m.pollLastEntry()
The following is an example to remove the last entry of the TreeMap
Example
import java.util.*; public class Demo { public static void main(String args[]){ TreeMap<Integer, String> m = new TreeMap<Integer, String>(); m.put(1,"India"); m.put(2,"US"); m.put(3,"Australia"); m.put(4,"Netherlands"); m.put(5,"Canada"); System.out.println("TreeMap Elements = "+m); System.out.println("Removing Last Entry : "+m.pollLastEntry()); System.out.println("Updated TreeMap Elements = "+m); } }
Output
The following is the output
TreeMap Elements = {1=India, 2=US, 3=Australia, 4=Netherlands, 5=Canada} Removing Last Entry : 5=Canada Updated TreeMap Elements = {1=India, 2=US, 3=Australia, 4=Netherlands}
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