Java7特性：Switch("")

在JDK7的时候，switch语句开始可以直接判断一个字符串是否等于各个case的字符串了，只是这种判断的效率是否能够保证呢？了解一下这个特性吧。

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package hengbao.study;public class LearnSomething {    public static void printDay(String dayOfWeek){        switch(dayOfWeek){        case "Sunday":            System.out.println("周日快乐！");            break;        case "Monday":            System.out.println("周一快乐！");            break;        case "Tuesday":            System.out.println("周二快乐！");            break;        case "Wednesday":            System.out.println("周三快乐！");            break;        case "Thursday":            System.out.println("周四快乐！");            break;        case "Friday":            System.out.println("周五快乐！");            break;        case "Saturday":            System.out.println("周六快乐！");            break;        default:            System.out.println("输入不合法");            break;        }    }    public static void main(String[] args) {        // TODO Auto-generated method stub        printDay("Tuesday");    }}