Get first value in Java TreeSet

Java 8Object Oriented ProgrammingProgramming

To get the first value in TreeSet, use the first() method.

First, get the TreeSet and add elements to it

TreeSet<String> tSet = new TreeSet<String>();
tSet.add("10");
tSet.add("20");
tSet.add("30");
tSet.add("40");
tSet.add("50");
tSet.add("60");

Now, get the first value

tSet.first()

The following is an example to get the first value in TreeSet

Example

 Live Demo

import java.util.*;
public class Demo {
   public static void main(String args[]){
      TreeSet<String> tSet = new TreeSet<String>();
      tSet.add("10");
      tSet.add("20");
      tSet.add("30");
      tSet.add("40");
      tSet.add("50");
      tSet.add("60");
      System.out.println("TreeSet elements...");
      Iterator i = tSet.iterator();
      while(i.hasNext()){
         System.out.println(i.next());
      }
      System.out.println("First Value = " + tSet.first());
   }
}

Output

The output is as follows

TreeSet elements...
10
20
30
40
50
60
First Value = 10
raja
George John
Published on 17-Jan-2019 09:54:27
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