try-finally is a clause used to define a block of code which may throw an exception along with instructions to execute regardless of whether an exception occurs or not.
I found some code where they want to propagate an exception, but they want to run some clean-up code beforehand, so naturally it uses Try/Catch/Finally. But... they aren't actually doing anything with the exception, only forwarding it on. It was my…
I'm reading a file containing binary data followed by a serialized object:
FileInputStream fis = new FileInputStream(file);
GZIPInputStream gzis = new GZIPInputStream(fis);
DataInputStream dis = new DataInputStream(gzis);
ObjectInputStream ois = new…
I'm trying to make an Android game, and I am following a few code samples to get my game loop working. It involves making a new thread. In the run() method I have a try/finally block. After the finally block executes a NullPointerException is…
For a long time I thought that it allows me to free up all the resources in the finally block and I thought that if an exception happens in the try block, then the resources will still be free up in the finally block. But that seems not to be the…
I have this code to figure out the width of some text:
function textWidth(text, font) {
const span = document.createElement('span')
try {
span.style.cssText = `position: absolute; opacity: 0; font: ${font || "'Arial'"};`
…
I just think of this question, and I have not found a similar question asked anywhere. I can close this one if there is a duplicate that I have not found.
Here is a simple example:
Assuming this is a multi-threading scenario, and in a writer thread,…
Is it possible to determine if an exception was thrown without a catch block? Visual Studio is able to mine the exception out of my program state and put it as a pseudo-variable ($exception). Can I do something similar?
I'm working with external…
I am getting different output in each run of my program. When executed first time, it gives
When executed again, it
Please tell me why it is occurring.
public class TwoExcepProg {
public static void main(String[] args) {
try
{
…
Suppose I have some C# code like this:
try {
Method1();
}
catch(...) {
Method2();
}
finally {
Method3();
}
Method4();
return;
My question is, provided no exception is thrown, will Method3() be executed before Method4(), or is it that…
I'm writing a loop that ignored the Exception and it works well.
for (; flag; ) {
try {
//do something ignore exception.
Runnable r = queue.pollFirst();
r.run();
} catch (Exception ignored) {
…
I have following two code block, which I use to compress a String.
code 1
public static String compressResponse(String response) throws IOException {
Deflater deflater = new Deflater(Deflater.DEFLATED, true);
ByteArrayOutputStream…
I think everyone will agree that
with open(file_name, 'mode') as f:
#do things with f
is way better than
f = open(file_name, 'mode')
#do things with f
f.close()
From http://effbot.org/zone/python-with-statement.htm we can read
When the…
I stumbled across an interesting error yesterday and have since fixed it, but it still was bothering me this morning, so I would like to see if anyone can shed some light on the issue.
The code in question:
final ResultSet rs =…
RE: How to correctly write Try..Finally..Except statements?
I'm still confused by the OP's original question. Specifically, the last line of the procedure (outside of the try..finally..end) that reads "Screen.Cursor:=crDefault".
My understanding is…
def connect(self):
ok = False
try:
conn = ftplib.FTP(self.hostname, self.user, self.password)
ok = True
return conn
finally:
if not ok:
logging.error('Failed to connect to %s for %s' %…
