Question

I am creating a simple registration frame that adds records onto a database. It gives me an error message every time it runs the SQL query that adds records in the database, however it still adds them, but because of that my programs gets to a standstill, instead of opening another window.

here’s that part of the code:

regButton.addActionListener(new ActionListener() {

@Override public void actionPerformed( ActionEvent e ) {
   //Execute when button is pressed
   if(   uNameField.getText().equals("")
      || new String(newPassField.getPassword()).equals("")
      || new String(repeatPassField.getPassword()).equals("") ) {
      errorLabel.setForeground(Color.red);
      errorLabel.setText("Some fields are left blank");
   }
   else if( new String(newPassField.getPassword()).equals(
            new String(repeatPassField.getPassword()))){
      Statement stmt;
      ResultSet res;
      try
      {
         //SET USERNAME AND PASSWORD FROM FIELDS TO UPPER CASE
         String username = uNameField.getText().toUpperCase();
         String password = new String(newPassField.getPassword()).toUpperCase();
         //SQL INSERT QUERY
         String sql;
         sql = "INSERT INTO Employees VALUES ('" +username +"','" +password +"');";
         stmt = con.createStatement();
         res = stmt.executeQuery(sql);
         System.out.println("Added to database!");
         con.close();
      }
      catch(SQLException exe) {
         System.out.println("Error creating or running statement: " + e.toString());
         try {
            con.close();
         }
         catch(Exception eex){}
      }
   }
   else {
      errorLabel.setForeground(Color.red);
      errorLabel.setText("Password missmatch");
   }
}

Every time it registers a new employee (user) it displays this “Error creating or running statement: ….. ” although, I can find the newly added employees in the employee list.

What may be causing this problem?

Answer 1

You need to use executeUpdate for SQL INSERTs

int rowCount = stmt.executeUpdate(sql);