Login.java Bean found on forum not working.

Question

I found this bean on this forum, It is however not correct, as it will always return true, so a it has a logic error. It has been discussed before on this forum before abut 10 times if you do a search, nobody seems to have a 100% working solution though.
Does anyone have a complete fix to this bean or an alternative they may feel will work????
package foo;
import java.sql.*;
public class Login {
private String username = "";
private String password = "";
public Login() {}
  public void setUsername(String username) {
     this.username = username;
  public void setPassword(String password) {
     this.password = password;
public boolean authenticate(String username2, String password2) throws ConnectionException, SQLException
   String query="select * from Registration;";
   String DbUserName="";
   String DbPassword="";
  try { //try
       Class.forName("com.mysql.jdbc.Driver").newInstance();
        Connection con=DriverManager.getConnection("jdbc:mysql://localhost/Users");
        Statement stat=con.createStatement();
        ResultSet rst=stat.executeQuery(query);
        while(rst.next())
            {  //while
                 DbUserName=rst.getString("UserName");
                 DbPassword=rst.getString("password");
                  if (username2.equals(DbUserName) && password2.equals(DbPassword)) {
                        break;   } //if
             }//while
     return true;
}catch(Exception e){
e.printStackTrace();
return false;
}}

Answer 1

One way is to change the "break;" line to "return true;" and remove the current "return true;" line. Then move the "return false;" line outside the catch section. It seems whatever you are doing is not throwing an exception, so whatever else it does, it always falls thru to the return true line.