System.out.println("this is try method"); return "this is try return"; }catch(Exception e){ e.printStackTrace(); }finally{ System.out.println("this is finally method"); return "this is finally return"; } } public static void main(String[] args) { System.out.println(m1()); } 1...
Java编译器要求Java程序必须捕获或声明所有的非运行时例外,但对运行时例外可以不做处理。 2.3 异常处理关键字 Java的异常处理是通过5个关键字来实现的:try,catch,throw,throws,finally。JB的在线帮助中对这几个关键字是这样解释的: Throws: Lists the exceptions a method could throw. Throw: Transfers control of...
try { obj.method() } catch (NullPointerException e) { ... } 正例: if (obj != null){ ... } 1. 2. 3. 4. 5. 6. 7. 8. 9. 十、注意异常匹配的顺序,优先捕获具体的异常 注意异常的匹配顺序,因为只有第一个匹配到异常的catch块才会被执行。如果你希望看到,是NumberFormatException异常,就抛...
public static void main(String[] args)throws IOException { // TODO Auto-generated method stub boolean flag=true; while(flag) { try { System.out.println("输入学生分数:"); Scanner in =new Scanner(System.in); int score=in.nextInt(); if(score<=100&&score>=0) { //正常分数 if(score>=...
the following actions. If the stamp represents holding a write lock, releases it and obtains a read lock. Or, if a read lock, returns it. Or, if an optimistic read, acquires a read lock and returns a read stamp only if immediately available...
");}结果：调用estException出现异常，异常信息为：java.lang.ArrayIndexOutOfBoundsException: 10第二种：public static void main(String[] args) {try {TestException.testException();} catch (Exception e) {System.out.println("调用estException出现异常，异常信息为："+e);}}public static ...
软件开发过程中,不可避免的是需要处理各种异常,就我自己来说,至少有一半以上的时间都是在处理各种异常情况,所以代码中就会出现大量的try {...} catch {...} finally {...}代码块,不仅有大量的冗余代码,而且还影响代码的可读性。比较下面两张图,看看您现在编写的代码属于哪一种风格?然后哪种编码风格您更喜欢...
Method java/lang/Exception.printStackTrace:()V31:returnException table:from to target type22326Class java/lang/ExceptionpublicstaticvoidforTry();Code:0:iconst_31:istore_02:iconst_03:istore_14:iload_15:sipush10008:if_icmpge3111:iload_012:i2d13:invokestatic #4// Method java/lang/Math.sin:(...
HttpRequestMethodNotSupportedException:若匹配到了(匹配结果是一个列表,不同的是http方法不同,如:Get、Post 等),则尝试将请求的http方法与列表的控制器做匹配,若没有对应http方法的控制器,则抛该异常; HttpMediaTypeNotSupportedException:然后再对请求头与控制器支持的做比较,比如content-type请求头,若控制器的参数...
Because the FileReader and BufferedReader instances are declared in a try-with-resource statement, they will be closed regardless of whether the try statement completes normally or abruptly (as a result of the method BufferedReader.readLine throwing an IOException). Prior to Java SE 7, you can ...