Questions related to the finally block in try-catch construct.
Questions tagged [finally]
278 questions
12
votes
2 answers
Property finally is missing in type Promise
I'm pretty sure I'll be able to solve this issue by myself but if it can help somebody else I want to share and save somebody else time.
I had to add the es6-promise library to get rid of this error
Promise only result to a type, but is only used…
Loic Coenen
- 773
- 3
- 8
- 19
12
votes
3 answers
object reference set to null in finally block
public void testFinally(){
System.out.println(setOne().toString());
}
protected StringBuilder setOne(){
StringBuilder builder=new StringBuilder();
try{
builder.append("Cool");
return builder.append("Return");
}finally{
builder=null; /* ;)…
Mahendra Athneria
- 1,203
- 3
- 16
- 32
12
votes
5 answers
finally doesn't seem to execute in C# console application while using F5
int i=0;
try{
int j = 10/i;
}
catch(IOException e){}
finally{
Console.WriteLine("In finally");
Console.ReadLine();
}
The finally block does not seem to execute when pressing F5 in VS2008.
I am using this code in Console Application.
Mohammad Nadeem
- 9,134
- 14
- 56
- 82
11
votes
3 answers
Using finally block vs writing code after the try/catch block
As I understand, the following 2 examples should do the same thing. Why is the 1st considered better?
1:
try {
riskyMethod();
}
catch(Exception e) {
//handle exception
}
finally {
cleanUp();
}
2:
try {
riskyMethod();
}
catch(Exception e) {
…
Voriki
- 1,617
- 2
- 19
- 43
11
votes
2 answers
Execute if no exception thrown
I have some code I want to execute if an exception is not thrown.
Currently I'm doing this:
try:
return type, self.message_handlers[type](self, length - 1)
finally:
if not any(self.exc_info()):
self.last_recv_time = time.time()
Can…
Matt Joiner
- 112,946
- 110
- 377
- 526
11
votes
1 answer
How to add a polyfill to support finally() in Edge?
I'm using axios library and using then(), catch() and finally(). Works perfectly in Chrome. However the finally() method does not work in MS Edge. I researched using polyfills or shims and I'm lost. I am not using webpack or transpiling and don't…
Craig
- 770
- 3
- 14
- 26
11
votes
5 answers
Proper replacement for the missing 'finally' in C++
Since there is no finally in C++ you have to use the RAII design pattern instead, if you want your code to be exception safe. One way to do this is by using the destructor of a local class like this:
void foo() {
struct Finally {
…
Sascha
- 1,410
- 2
- 10
- 10
11
votes
6 answers
Java's strange behavior while returning from finally block
Try this piece of code. Why does getValueB() return 1 instead of 2? After all, the increment() function is getting called twice.
public class ReturningFromFinally
{
public static int getValueA() // This returns 2 as expected
{
…
CodeBlue
- 14,631
- 33
- 94
- 132
11
votes
4 answers
Does try/finally ignore exceptions?
I have a situation where I want certain code to be executed no matter what happens, but I need exceptions to also be passed on up the stack to be handled later. Is the following:
try
{
// code
}
finally
{
// code that must run
}
going to just…
Matt H
- 7,311
- 5
- 45
- 54
10
votes
11 answers
Where the finally is necessary?
I know how to use try-catch-finally. However I do not get the advance of using finally as I always can place the code after the try-catch block.
Is there any clear example?
Tray13
- 139
- 4
10
votes
1 answer
Status of JSR/RET in JVM spec
There are some parts of the JVM specification which suggest that the operations JSR (Jump SubRoutine), JSR_W (Jump SubRoutine Wide) and RET (RETurn from subroutine) may be used only up to class file version 50.0 (JDK 1.6):
3.13 Compiling…
MvG
- 57,380
- 22
- 148
- 276
10
votes
4 answers
Get thrown exception in finally block
Is there a way, how to get currently thrown exception (if exists)?
I would like reduce amount of code and apply some reuse for task looks like:
Exception thrownException = null;
try {
// some code with 3rd party classes, which can throw…
TcKs
- 25,849
- 11
- 66
- 104
10
votes
5 answers
Close connection and statement finally
Which is better for finally block:
finally {
try {
con.close();
stat.close();
} catch (SQLException sqlee) {
sqlee.printStackTrace();
}
}
Or:
finally {
try {
if…
Sajad
- 2,273
- 11
- 49
- 92
9
votes
4 answers
Does finally completely execute if an exception is thrown within finally block
so I have a bit of code here and I'm not sure entirely how it would react in the event that the reader.close() method throws an exception.
public void someMethod(String s) throws IOException{
BufferedReader reader =…
ElvenAshwin
- 183
- 1
- 7
8
votes
7 answers
Is finally block in C# a must?
What is the difference between 2 conditions? Every time when method1 or method2 runs, there should be a code block that is required to run. It seems to me that 2 method are the same.
// example method1
void Method1(void)
{
try
{
//…
sanchop22
- 2,729
- 12
- 43
- 66