Groovy字符串加载

week = "Friday"text = "Today is $week"PRintln text // Today is Fridayweek = "Saturday"println text // Today is Friday虽然week的值发生了改变，但同时该变量的引用也发生了变化，对字符串未发生影响。2、把String改成了StringBuffer，并修改了内容，字符串的值发生了变化，说明字符串的变量加载是延迟的。
week = new StringBuffer("Friday")text = "Today is $week"println text // Today is Fridayweek.replace(0, 6, "Thursday")println text // Today is Thursday3、可以把字符串改成闭包，同样可以延迟加载。
week = "Friday"text = "Today is ${->week}"println text // Today is Fridayweek = "Saturday"println text // Today is Saturday