System.out.println("Inside try block"); }catch(Exception e) { System.out.println("Exception caught"); }finally{ System.out.println("Finally block always executes"); } 它主要用于放置必须执行的清理代码,如关闭文件流、释放数据库连接等。 finally块中的代码总是在try和catch执行之后、方法返回之前执行。
the previous statement of try blockException in thread "main" java.lang.ArithmeticException: / by zeroat com.bj.charlie.Test.test(Test.java:15)at com.bj.charlie.Test.main(Test.java:6)另外，如果去掉上例中被注释的两条语句前的注释符，执行结果则是：return value of test(): 0 在以上两种情况...
System.out.println("finally block"); } } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 清单1 的执行结果如下: the previous statement of try block Exception in thread "main" java.lang.ArithmeticException: / by zero at com.bj....
The above flow-diagram sums up all you need to know regarding try-catch-finally construct in Java. Summary: When an exception occurs, JVM creates and pass the exception object to the first matching catch block. Once the code within the first matching catch block is executed, if found, the...
Finally block executed! Exception in thread "main" java.lang.RuntimeException: Test Exception 总结 finally块通常会被执行,它是 Java 保证资源清理的重要机制。 特殊情况导致finally不执行: JVM 崩溃(如OutOfMemoryError)。 调用了System.exit(int)。
} public static void main(String a[]) { try { methodA(); } catch (Exception e) { System.out.println("Exception caught in main = "+e); } methodB(); methodC(); }} Output: We are inside methodA()The methodA()'s finally block executesException caught in main = java.lang.Run...
问‘'finally block不能正常完成’Eclipse警告EN删除其中的return语句。最后一个块被认为是清除块，返回...
finally内部使用 return 语句是一种很不好的习惯,如果try中还有return语句,它会覆盖了try 区域中return语句的返回值,程序的可读性差。面对上述情况,其实更合理的做法是,既不在try block内部中使用return语句,也不在finally内部使用return语句,而应该在 finally 语句之后使用return来表示函数的结束和返回。
the previous statementoftryblock Exceptioninthread"main"java.lang.ArithmeticException:/by zero at com.bj.charlie.Test.test(Test.java:15)at com.bj.charlie.Test.main(Test.java:6) 另外,如果去掉上例中被注释的两条语句前的注释符,执行结果则是: ...
If an exception is thrown in thetryblock and a subsequent exception is thrown in thefinallyblock the original exception is lost. The problem where an exception is hidden by a subsequent exception is well known and is discussed in a number of books:Thinking in Java[Eckel] 'the lost exception...