mysql - How to know if an sql statement executed in java? -

mysql - How to know if an sql statement executed in java? -

I want to know if this delete statement actually deleted something, the code below always executes the second . Whether it has destroyed something or not, what is the proper way to do it? Public Deliver (String Pimm, String Powered) {{Create the created space Player = conn.prepareStatement ("Remove from players, where P_Name = '" + pname + "' and P_Word = '' + Pword + "''); createPlayer.execute (); if (createPlayer.execute () == true) {JOptionPane.showMessageDialog (tap," Player successfully deleted! ");} Else {JOptionPane. ShowMessageDialog (empty, "player is not present!", "Not deleted", joptionpan.rrro_mmseg);}} hold (exception e) {}}

you actually remove This statement is executing twice, since you call .execute () twice in most cases, you do not have the possibility of data that can be deleted by the statement if you can Run another time.

Instead, use the row that has been modified to the number of rows you have:

  int lines generated = createPlayer.executeUpdate (); if (Affected by rows & gt; 0) {JOptionPane.showMessageDialog (tap, "Player Successful Apurwk deleted! "); } Else {JOptionPane.showMessageDialog (empty, "Player is not present!", "Not deleted", JOHNPANPAN.ARROOM_MMSEG); }








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