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Java Program to merge duplicates of a List with TreeSet
Let’s say the following is a List. In this, we have duplicates elements as well −
List<String>ls = new ArrayList<String>();
ls.add("A");
ls.add("B");
ls.add("C");
ls.add("D");
ls.add("D");
ls.add("E");
ls.add("F");
ls.add("G");
ls.add("E");Now, create a TreeSet and merge the duplicates of the List −
TreeSet<String>set = new TreeSet<String>(); set.addAll(ls);
Example
import java.util.ArrayList;
import java.util.TreeSet;
import java.util.List;
public class Demo {
public static void main(String[] args) {
List<String>ls = new ArrayList<String>();
ls.add("A");
ls.add("B");
ls.add("C");
ls.add("D");
ls.add("D");
ls.add("E");
ls.add("F");
ls.add("G");
ls.add("E");
TreeSet<String>set = new TreeSet<String>();
set.addAll(ls);
System.out.println("TreeSet = "+set);
}
}Output
TreeSet = [A, B, C, D, E, F, G]
Updated on: 30-Jul-2019
363 Views
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