### [在 return 中使用 finally](https://lingcoder.gitee.io/onjava8/#/book/15-Exceptions?id=%e5%9c%a8-return-%e4%b8%ad%e4%bd%bf%e7%94%a8-finally) 因為 finally 子句總是會執行，所以可以從一個方法內的多個點返回，仍然能保證重要的清理工作會執行： ~~~ // exceptions/MultipleReturns.java public class MultipleReturns { public static void f(int i) { System.out.println( "Initialization that requires cleanup"); try { System.out.println("Point 1"); if(i == 1) return; System.out.println("Point 2"); if(i == 2) return; System.out.println("Point 3"); if(i == 3) return; System.out.println("End"); return; } finally { System.out.println("Performing cleanup"); } } public static void main(String[] args) { for(int i = 1; i <= 4; i++) f(i); } } ~~~ 輸出為： ~~~ Initialization that requires cleanup Point 1 Performing cleanup Initialization that requires cleanup Point 1 Point 2 Performing cleanup Initialization that requires cleanup Point 1 Point 2 Point 3 Performing cleanup Initialization that requires cleanup Point 1 Point 2 Point 3 End Performing cleanup ~~~ 從輸出中可以看出，從何處返回無關緊要，finally 子句永遠會執行。