private void jCheckBox1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jCheckBox1ActionPerformed
        if (jCheckBox1.isSelected() == true) {
            txtContratante.setText(null);
            txtContratante.setEditable(false);
        } else {
            txtContratante.setEditable(true);
        }

    }