MY_TEST=
  (DESCRIPTION=
    (ADDRESS=
      (PROTOCOL=TCP)
      (HOST=host-test)
      (PORT=1521))
    (CONNECT_DATA=
      (SERVER=dedicated)
      (SERVICE_NAME=servtest)))

DriverManager.getConnection("jdbc:oracle:thin:@host-test:1521:servtest", "LOGIN", "PASS");

Class.forName("oracle.jdbc.OracleDriver"); 
Class.forName("oracle.jdbc.driver.OracleDriver");

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class Main {
	public static void main(String[] args) throws SQLException {

		Connection myConn = null;
		Statement myStmt = null;
		ResultSet myRes = null;

		String connectName;
		String userName;
		String password;

		connectName = "MY_TEST";
		userName = "USER1";
		password = "PASSUSER1";

		try {
			System.setProperty("oracle.net.tns_admin", "d:\\Oracle\\product\\12.1.0\\client_1\\network\\admin\\");
			String url = "jdbc:oracle:thin:@" + connectName;
			myConn = DriverManager.getConnection(url, userName, password);
			myStmt = myConn.createStatement();
			myRes = myStmt.executeQuery("select name from user");
			
			while (myRes.next()) {
				System.out.print(myRes.getString("name"));
			}
		} catch (SQLException e) {
			System.out.println("ERROR");
		} finally {
			try {
				if (myStmt != null) {
					myStmt.close();
				}
				if (myRes != null) {
					myRes.close();
				}
				if (myConn != null) {
					myConn.close();
				}
			} catch (SQLException e) {
				System.out.println("ERROR 2");
			}
		}

	}
}

Exception in thread "main" java.lang.UnsatisfiedLinkError: C:\Windows\System32\ocijdbc12.dll: Can't load IA 32-bit .dll on a AMD 64-bit platform