Write a SQLUtils class that contains static closeQuietly methods that catch and log such exceptions, then use as appropriate. You’ll end up with something that reads like this: public class SQLUtils { private static Log log = LogFactory.getLog(SQLUtils.class); public static void closeQuietly(Connection connection) { try { if (connection != null) { connection.close(); } } catch … Read more
Finally always executes. That’s what it’s for, which means its return value gets used in your case. You’ll want to change your code so it’s more like this: function example() { var returnState = false; // initialization value is really up to the design try { returnState = true; } catch { returnState = false; … Read more
No, it’s not a bad practice. Putting return where it makes sense improves readability and maintainability and makes your code simpler to understand. You shouldn’t care as finally block will get executed if a return statement is encountered.
If you call System.exit() the program exits immediately without finally being called. A JVM Crash e.g. Segmentation Fault, will also prevent finally being called. i.e. the JVM stops immediately at this point and produces a crash report. An infinite loop would also prevent a finally being called. The finally block is always called when a … Read more
Because if an exception gets thrown no code after the try block is executed unless the exception is caught. A finally block is always executed no matter what happens inside your try block.
It is overridden by the one in finally, because finally is executed after everything else. That’s why, a rule of thumb – never return from finally. Eclipse, for example, shows a warnings for that snippet: “finally block does not complete normally”
If any of the code in the try block can throw a checked exception, it has to appear in the throws clause of the method signature. If an unchecked exception is thrown, it’s bubbled out of the method. The finally block is always executed, whether an exception is thrown or not.
Returning from inside a finally block will cause exceptions to be lost. A return statement inside a finally block will cause any exception that might be thrown in the try or catch block to be discarded. According to the Java Language Specification: If execution of the try block completes abruptly for any other reason R, … Read more
The big difference is that try…catch will swallow the exception, hiding the fact that an error occurred. try..finally will run your cleanup code and then the exception will keep going, to be handled by something that knows what to do with it.
If a finally block throws an exception what exactly happens ? That exception propagates out and up, and will (can) be handled at a higher level. Your finally block will not be completed beyond the point where the exception is thrown. If the finally block was executing during the handling of an earlier exception then … Read more