Teste conexao BD

Class.forName("org.gjt.mm.mysql.Driver");

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

  
 public class TesteConexaoBD {  
     public static void main (String s[]){     
         try{  
           Class.forName("com.mysql.jdbc.Driver");  
           Connection con;  
           con = DriverManager.getConnection("jdbc:mysql://localhost:3306/algo", "meu usuario", "umasenha");  
           PreparedStatement sta= con.prepareStatement("SELECT *FROM usuarios");  
           ResultSet res = sta.executeQuery();  
           while(res.next()){  
                System.out.println(res.getString("nome"));  
           }  
       }catch (Exception e){  
          System.out.println("erro de conexao\n\n"+ e);  
       }  
    }  
  
 }