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Check if a particular value exists in Java TreeSet
The contains() method is used to check if a particular value exists.
First, create a TreeSet and add elements −
TreeSet<String> set = new TreeSet<String>();
set.add("34");
set.add("12");
set.add("67");
set.add("54");
set.add("76");
set.add("49");Use the contains() method to check if a value exist or not i.e. 12 in this case −
set.contains("12")The following is an example to check whether a particular value exist or not −
Example
import java.util.*;
public class Demo {
public static void main(String args[]){
TreeSet<String> set = new TreeSet<String>();
set.add("34");
set.add("12");
set.add("67");
set.add("54");
set.add("76");
set.add("49");
System.out.println("TreeSet elements...");
Iterator<String> i = set.iterator();
while(i.hasNext()) {
System.out.println(i.next());
}
System.out.println("Does element 12 exist in the TreeSet ? " + set.contains("12"));
}
}Output
TreeSet elements... 12 34 49 54 67 76 Does element 12 exist in the TreeSet ? true
Updated on: 30-Jul-2019
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