This tutorial will teach you how to find the account holder balance using Key Release Event Java and Mysql.
Select the txtaccountno textfield right click ->Key->Event->KeyReleased
past the code inside the KeyReleased event
private void txtaccnoKeyReleased(java.awt.event.KeyEvent evt) { Connection con; PreparedStatement pst; ResultSet rs; String accno = txtaccno.getText(); try { Class.forName("com.mysql.jdbc.Driver"); con = DriverManager.getConnection("jdbc:mysql://localhost/vbank","root",""); pst = con.prepareStatement("select accno,bal from account where accno = ?"); pst.setString(1, accno); rs = pst.executeQuery(); if(rs.next() == true) { String balance = rs.getString(2); txtbal.setText(balance); } else { txtbal.setText(""); } } catch (ClassNotFoundException ex) { } catch (SQLException ex) { } }
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