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                ## **finally關鍵字** finally 關鍵字用來創建在 try 代碼塊后面執行的代碼塊。 無論是否發生異常,finally 代碼塊中的代碼總會被執行。 在 finally 代碼塊中,可以運行清理類型等收尾善后性質的語句。 finally 代碼塊出現在 catch 代碼塊最后,語法如下: ``` try{ // 程序代碼 }catch(異常類型1 異常的變量名1){ // 程序代碼 }catch(異常類型2 異常的變量名2){ // 程序代碼 }finally{ // 程序代碼 } ``` ### **finally關鍵字案例** ``` package day02try; public class day07Excption { public static void main(String[]args){ int a[] = new int[2]; try{ System.out.println("Access element three:" + a[3]); }catch(ArrayIndexOutOfBoundsException e){ System.out.println("Exception thrown:" + e); } finally{ a[0] = 6; System.out.println("First element value:" + a[0]); System.out.println("The finally statement is executed"); } } } ``` **運行結果:** Exception thrown:java.lang.ArrayIndexOutOfBoundsException: 3 First element value:6 The finally statement is executed **注意下面事項:** * catch 不能獨立于 try 存在。 * 在 try/catch 后面添加 finally 塊并非強制性要求的。 * try 代碼后不能既沒 catch 塊也沒 finally 塊。 * try, catch, finally 塊之間不能添加任何代碼。
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