${}

在Scala中使用字符串插值函数，需要再字符串前加上字符"s"，然后再字符串中的每个插值变量前加上“$”符号。 scala> val name = "Fred" name: String = Fred scala> val age = 18 age: Int = 18 scala> val weight = "200" weight: String = 200 scala> println(s"$name is $age years old, and weights $weight pounds") Fred is 18 years old, and weights 200 pounds 除了可以使用变量外还可以在字符串插值中使用表达式代码。 scala> println(s"$age next year is ${age + 1}") 18 next year is 19 scala> println(s"$age is 18: ${age == 18}") 18 is 18: true 还可以在插值表达式中使用对象。 scala> println(s"${student.name} is ${student.age} age years old.") Fred is 18 age years old. Scala为我们提供了更多的字符串插值函数，比如使用"f