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vichet · Guest

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

Paul Furbacher [TeamB] · Guest

vichet wrote: