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Get first value in Java TreeSet
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
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
Updated on: 29-Jun-2020
1K+ Views
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