Returns true if this set contains the specified element.we can say returns true if and only if this set contains an element e such that (o==null ? e==null :
o.equals(e)).
import java.util.HashSet;
import java.util.Set;
public class ContailsElement {
public static void main(String[] args) {
Set<String> hs = new HashSet<String>();
hs.add(“java”);
hs.add(“php”);
hs.add(“html”);
hs.add(“javascript”);
hs.add(“mysql”);
//print hashset
System.out.println(“hashset = “+hs);
System.out.println(hs.contains(“java”));
System.out.println(hs.contains(“HTml”));
System.out.println(hs.contains(“delhi”));
}
}
hashset = [javascript, php, html, java, mysql]
true
false
false