package Tools;import java.sql.*;public class sql{      String dbDriver = "com.mysql.jdbc.Driver";          String ConnStr = "jdbc:mysql://localhost:3306/Bank";      Connection Conn = null;      ResultSet Rst = null;   public sql(){        try{         Class.forName("com.mysql.jdbc.Driver");         }catch(java.lang.ClassNotFoundException e){                System.err.print(e.getMessage());         }   }   public ResultSet sqlQuery(String cmdText){       Rst = null;       try{           Conn = DriverManager.getConnection(ConnStr, "root", "wb");           Statement stmt = Conn.createStatement();           try{           Rst = stmt.executeQuery(cmdText);           }catch(java.sql.SQLException e){              System.err.println("falier1"+e);           }           //Conn.close();        }catch(java.sql.SQLException e){              System.err.println("failer2"+e);       }       return Rst;     }     public void sqlUpdate(String cmdText){         try{              Conn = DriverManager.getConnection(ConnStr, "root", "wb");              Statement stmt = Conn.createStatement();              stmt.executeUpdate(cmdText);             //Conn.close();         }catch(java.sql.SQLException e){              System.err.println(e);         }     }   }