轉載:http://blog.csdn.net/hguisu/article/details/6155636
1. 引子
try…catch…finally恐怕是大家再熟悉不過的語句了,而且感覺用起來也是很簡單,邏輯上似乎也是很容易理解。不過,我親自體驗的“教訓”告訴我,這個東西可不是想象中的那麼簡單、聽話。不信。那你看看下面的代碼,“猜猜”它執行後的結果會是什麼。不要往後看答案、也不許執行代碼看真正答案哦。如果你的答案是正確,那麼這篇文章你就不用浪費時間看啦。
<span style="background-color: rgb(255, 255, 255);">package Test; public class TestException { public TestException() { } boolean testEx() throws Exception { boolean ret = true; try { ret = testEx1(); } catch (Exception e) { System.out.println("testEx, catch exception"); ret = false; throw e; } finally { System.out.println("testEx, finally; return value=" + ret); return ret; } } boolean testEx1() throws Exception { boolean ret = true; try { ret = testEx2(); if (!ret) { return false; } System.out.println("testEx1, at the end of try"); return ret; } catch (Exception e) { System.out.println("testEx1, catch exception"); ret = false; throw e; } finally { System.out.println("testEx1, finally; return value=" + ret); return ret; } } boolean testEx2() throws Exception { boolean ret = true; try { int b = 12; int c; for (int i = 2; i >= -2; i--) { c = b / i; System.out.println("i=" + i); } return true; } catch (Exception e) { System.out.println("testEx2, catch exception"); ret = false