How to connect to jdbc with Connector/j 8.0.20 (1 reply)

Faild to connect to jdbc Jdk 8.0.u251
MySql Server 8.0
The connector/j 8.0.20
IDE : NetBeans 8.2

My code :
public Connection MySqlConnection() {
Connection conn = null;
try {
Class.forName("com.mysql.jdbc.Driver");
conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/aliens","root", "*************");
JOptionPane.showMessageDialog(null,"Mysql DB connection successful...");
return conn;
} catch (Exception e) {
JOptionPane.showMessageDialog(null,"Mysql connection failed....");
return null;
}
}