scala自身是没有continue，break这两个语法关键词的。

但是实际上我们还是很希望有这两个语法，那么我们是否可以自己实现呢？

• 从官网上搜索，我们可以找到一下关于break的类相关资料：

Breaks extends

A class that can be instantiated for the break control abstraction. Example usage:

val mybreaks = new Breaksimport mybreaks.{break, breakable}breakable {  for (...) {    if (...) break()  }}

Calls to break from one instantiation of Breaks will never target breakable objects of some other instantiation.

• continue测试：

import util.control.Breaks._/**  * Created by Administrator on 2016/11/15.  */object MyMain {  def main(args: Array[String]): Unit = {    println("Hello World")    for (index <- 1 to 10) {      breakable {        if (index == 6) {          println("the index is ："+index)          break()        }        else {          println("hello" + index)        }      }    }  }}

 输出结果

Hello World

hello1

hello2

hello3

hello4

hello5

the index is ：6

hello7

hello8

hello9

hello10

Process finished with exit code 0

• break测试：

import util.control.Breaks._/**  * Created by Administrator on 2016/11/15.  */object MyMain {  def main(args: Array[String]): Unit = {    println("Hello World")    breakable {      for (index <- 1 to 10) {        if (index == 6) {          println("the index is ：" + index)          break()        }        else {          println("hello" + index)        }      }    }  }}

 或者

import util.control.Breaks._/**  * Created by Administrator on 2016/11/15.  */object MyMain {  def main(args: Array[String]): Unit = {    println("Hello World")    for (index <- 1 to 10) {      if (index == 6) {        println("the index is ：" + index)        break      }      else {        println("hello" + index)      }    }  }}

 输出结果

Hello World

hello1

hello2

hello3

hello4

hello5

the index is ：6

 

参考资料： http://www.cnblogs.com/rollenholt/p/4119105.html