优化下面代码的最佳方法或设计模式是什么？(我已经考虑过使用switch语句但是switch语句在单例中不能处理多个条件.)
以下是代码段.每个专业都由一定的数值范围决定.
public String getMajor(String major) {
crnCompare = Integer.parseInt(major);
if ((crnCompare >= 90702 && crnCompare <= 90733) || (crnCompare >= 10004 && crnCompare <= 10037)) {
this.major = "AC";
} else if ((crnCompare >= 10087 && crnCompare <= 10108) || (crnCompare >= 10471 && crnCompare <= 10482) || (crnCompare >= 90024 && crnCompare <= 90071)) {
this.major = "CS";
} else if ((crnCompare >= 10109 && crnCompare <= 10158) || (crnCompare >= 90072 && crnCompare <= 90116)) {
this.major …