try和catch是配对使用的,一般用来捕捉异常。 如: using(Sqlconnection con = new SqlConnection()) { //代码执行块 } using 的简单的理解:括号里定义的con只在using{}这对括号内有效,出了后就没用了 区别实例: using 语句确保调用Dispose,即使在调用对象上的方法时发生异常也是如此。通过将对象放入 try 块中,...
try和catch是配对使用的,一般用来捕捉异常。 如: using(Sqlconnection con = new SqlConnection()) { //代码执行块 } using 的简单的理解:括号里定义的con只在using{}这对括号内有效,出了后就没用了 区别实例: using语句确保调用Dispose,即使在调用对象上的方法时发生异常也是如此。通过将对象放入 try 块中,...
Use of the JAAS javax.security.auth.Subject.doAs methods in WebLogic Server applications do not associate the Subject with the client actions. You can use the doAs methods to implement Java EE security in WebLogic Server applications, but such usage is independent of the need to use the Securit...
You can use the Java SE 6 API specification to determine whether a specific method or class is supported in headless mode or not. If a specific component is not supported in headless mode, the only exception your application needs to catch is aHeadlessException. It will be thrown first among...
} catch (IOException ex) { ex.printStackTrace(); } return dbProperties; } private void loadDatabaseDriver(String driverName) { // Load the Java DB driver. try { Class.forName(driverName); } catch (ClassNotFoundException ex) { ex.printStackTrace(); ...
} catch (LoginException le) { ... } // Now try to execute ServerAction as the authenticated Subject Subject mySubject = lc.getSubject(); PrivilegedAction action = newServerAction(); Subject.doAs(mySubject, action); Figure 4. Sample server code ...
TagFromName; public class DumpDicomTagsToConsole { private static AttributeList list = new AttributeList(); public static void main(String[] args) { String dicomFile = "D:\\JavaProjects\\Sample Images\\MR-MONO2-16-head"; try { list.read(dicomFile); System.out.println("Study Instance ...
Try/catch/finally in Go. This is an experiment that tries to bring the exception behaviour of java/python/c++ to Golang using the same syntax. - manucorporat/try
[" + path + "]"; throw new FileNotFoundException(description + " cannot be resolved to URL because it does not exist"); } return url; } try { // try URL return new URL(resourceLocation); } catch (MalformedURLException ex) { // no URL -> treat as file path try { return new...
getErrorCode()); } finally { // it is a good idea to release // resources in a finally{} block // in reverse-order of their creation // if they are no-longer needed if (rs != null) { try { rs.close(); } catch (SQLException sqlEx) { } // ignore rs = null; } if (...