code: private void txtXDimensionFocusLost(java.awt.event.FocusEvent evt) {//GEN-FIRST:event_txtXDimensionFocusLost
          if (txtXDimension.getText().matches("[0-9]+")) {
              if (Integer.parseInt(txtXDimension.getText()) != 0) {
                  moduleWidth = Integer.parseInt(txtXDimension.getText());
                  encodeData();
              } else {
                  txtXDimension.setText(String.valueOf(moduleWidth));
              }
          } else {
              txtXDimension.setText(String.valueOf(moduleWidth));
          }
      }
docs: GEN-LAST:event_txtBorderWidthFocusLost