🚀 go-pugleaf

Dear All;

please help!
Let me explain you first about my problem

1- connectToMySqlJoke
------------------------------
import java.sql.*;
public class connectToMySqlJoke {

 private String serverHost;
 private String port;
 private String userName;
 private String password;
 private String schema;
 private Connection connection=null;
 private Boolean connected;

 public connectToMySqlJoke(){
  this.serverHost="localhost";
  this.port="3306";
  this.userName="root";
  this.password="123456";
  this.schema="jokedb";
  Connect();
 }


 public void Connect(){
  String connStr = "";
  try {
   Class.forName("com.mysql.jdbc.Driver");

   connStr="jdbc:mysql://"+ this.serverHost +":";
   connStr+=this.port + "/" + this.schema;

   connection =
DriverManager.getConnection(connStr,this.userName,this.password);

   this.connected=true;


  }
  catch (SQLException e){
   this.connected=false;
   //System.out.println("Sql error");

  }
  catch (ClassNotFoundException e){
   this.connected=false;
   //System.out.println("jdbc driver not found!");
  }


 }
 public Connection getConncetion() {
  return connection;
 }
 public void closeConnection(){
  try {
   connection.close();
  }
  catch (Exception e){}

 }
 public Boolean IsConnected(){
  return this.connected;
 }

}


2- TestConnection
---------------------

public class TestConnection {
 public static void main(String[] args) {
  connectToMySqlJoke mycnt=new connectToMySqlJoke();
  System.out.print(mycnt.IsConnected());
 }

}


Yes, it works after i compile it and it returns TRUE. it connects.
But after i make JAR file. it do not work. i wonder why?

I make like this:

My mainClass file contain:    Main-Class: TestConnection

jar cmf mainClass Test.jar *.class

then i run

java -jar Test.jar

it return false


help help