private void jButton4ActionPerformed(
     java.awt.event.ActionEvent evt) { // GEN-FIRST:event_jButton4ActionPerformed
   BitcoinAccount btcAcct = new BitcoinAccount(serverID);
   String balance = String.valueOf(btcAcct.checkBalance(jTextField2.getText()));
   // jTextField1.setText(balance);
   JOptionPane.showMessageDialog(null, "Your total balance is " + balance);
 } // GEN-LAST:event_jButton4ActionPerformed
 private void jButton6ActionPerformed(
     java.awt.event.ActionEvent evt) { // GEN-FIRST:event_jButton6ActionPerformed
   BitcoinAccount btcAcct = new BitcoinAccount(serverID);
   jTextField3.setText(btcAcct.getBlockNumber());
 } // GEN-LAST:event_jButton6ActionPerformed