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Get the element ordered first in Java TreeSet
To get the element ordered first i.e. the first element in TreeSet, use the first() method.
Create a TreeSet and add elements to it −
TreeSet<String> set = new TreeSet<String>();
set.add("65");
set.add("45");
set.add("19");
set.add("27");
set.add("89");
set.add("57");Now, get the first element −
set.first()
The following is an example to get the element ordered first in TreeSet −
Example
import java.util.*;
public class Demo {
public static void main(String args[]) {
TreeSet<String> set = new TreeSet<String>();
set.add("65");
set.add("45");
set.add("19");
set.add("27");
set.add("89");
set.add("57");
System.out.println("TreeSet elements (Sorted)...");
Iterator<String> i = set.iterator();
while(i.hasNext()) {
System.out.println(i.next());
}
System.out.println("Element order first = "+set.first());
}
}Output
TreeSet elements (Sorted)... 19 27 45 57 65 89 Element ordered first = 19
Updated on: 30-Jul-2019
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