switch多个case执行方法一样

 switch(stateCode){
  case 'MO': taxPercentage=1.0;    statePercentage=1.5;    break;
  case 'OR':
  case 'MA':
  case 'WI': taxPercentage=3.5;    statePercentage=0.5;    break;
  case 'CA':
  case 'NY':
  case 'VT': statePercentage=2.6;    taxPercentage=4.5;    break;
  case 'TX': taxPercentage=3.0;    break;
  default:    taxPercentage=2.0;    statePercentage=2.3;
 }