try{
       Class.forName("com.mysql.jdbc.Driver").newInstance();
       Connection conn= DriverManager.getConnection("jdbc:mysql://localhost:3306/database?zeroDateTimeBehavior=convertToNull","root","");
       Statement state= conn.createStatement();

       String sql="SELECT * FROM login where username="+"'"+nama.getText()+"'"+"AND katasandi="+"'"+pw.getText()+"'";
       ResultSet rs = state.executeQuery(sql);
       String user = null;
       String pass = null;
       while(rs.next()){
       user = rs.getString(1);
       pass = rs.getString(2);
       }
        if(!user.equals(null)&& !pass.equals(null))
        {
            this.setVisible(false);
            new MENU().setVisible(true);
        }
        else {
         JOptionPane.showMessageDialog(null,"Username Password Salah");
            nama.setText("");
            pw.setText("");
            nama.requestFocus();
                }
       }
       catch (Exception e)
       {
           JOptionPane.showMessageDialog(null,"Username Password Salah"+e.getMessage());
       }