Correct URL for connecting to java jdbc - postgresql

Question

I'm having trouble setting up a connection with my database here and was wondering what I may be doing wrong.
The error is as follows:
Exception in thread "main" java.sql.SQLException: No suitable driver found for jdbc:postgresql://168.16.1.128:5432/dbname
at java.sql.DriverManager.getConnection(DriverManager.java:689)
at java.sql.DriverManager.getConnection(DriverManager.java:270)
at sample.DbConnect.getConnection(DbConnect.java:21)
at sample.UserTest.main(UserTest.java:41)
My connecting class looks as follows:
public class DbConnect {
public java.sql.Connection getConnection() throws SQLException,IllegalAccessException, ClassNotFoundException {
java.sql.Connection conn = null;
String url = "jdbc:postgresql://168.16.1.128:5432/dbname";
conn = DriverManager.getConnection(url);
System.out.println("Connected to database");
return conn;
}
}
and heres where it gets called:
public class UserTest {
public static void main(String[] args) throws JSONException, SQLException, InstantiationException, IllegalAccessException, ClassNotFoundException{
DbConnect db = new DbConnect();
db.getConnection();
}
}
I have a feeling the error may come from the way the url is written and if this is the case can someone please explain to me how to properly write the url?
This database doesnt require a password and username to be connected to. I hope anyone can be so kind as to help me.
Thanks!