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How to cast an Object to an int
How can I cast an Object to an int in java?
19 Answers
19
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Specifically, what's dangerous about casting the result of malloc?
... the first one), you can get an unpredictable runtime error when using the cast without including stdlib.h.
So the error on your side is not the cast, but forgetting to include stdlib.h. Compilers may assume that malloc is a function returning int, therefore converting the void* pointer actually re...
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name=Red Hat Enterprise Linux $releasever - $basearch - Source
baseurl=ftp://ftp.redhat.com/pub/redhat/linux/enterprise/$releasever/en/os/SRPMS/
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
[rhel-source-beta]
name=Red Hat Enterprise Linux $releasever Bet...
Export database schema into SQL file
..._NAME
,''[''+inf.COLUMN_NAME+'']'' as COLUMN_NAME
,CAST(inf.ORDINAL_POSITION AS INT)
,inf.COLUMN_DEFAULT
,dobj.name AS ColumnDefaultName
,CASE WHEN inf.IS_NULLABLE = ''YES'' THEN 1 ELSE 0 END
,inf.DATA_TYPE
,case inf...
explicit casting from super class to subclass
...does not generate a compilation error, but at runtime it generates a ClassCastException . Why can't the compiler detect this error?
...
Why cannot cast Integer to String in java?
...archy.
Object
/ \
/ \
String Integer
The casting which you are trying, works only if they are in the same hierarchy, e.g.
Object
/
/
A
/
/
B
In this case, (A) objB or (Object) objB or (Object) objA will work.
Hence as others have mentioned a...
Better way to cast object to int
...
You have several options:
(int) — Cast operator. Works if the object already is an integer at some level in the inheritance hierarchy or if there is an implicit conversion defined.
int.Parse()/int.TryParse() — For converting from a string of unknown format...
Difference between DirectCast() and CType() in VB.NET
...just gotten into VB.NET. I generally use CType (and CInt, CBool, CStr) for casts because it is fewer characters and was the first way of casting which I was exposed to, but I am aware of DirectCast and TryCast as well.
...
Type safety: Unchecked cast
...ext().getBean("someMap");
Secondly, the compiler is complaining that you cast the object to a HashMap without checking if it is a HashMap. But, even if you were to do:
if(getApplicationContext().getBean("someMap") instanceof HashMap) {
private Map<String, String> someMap = (HashMap<S...
Assign null to a SqlParameter
...value or a DBNull type value, which are not compatible.
You can of course cast the instance of AgeIndex to be type object which would satisfy the ?: requirement.
You can use the ?? null-coalescing operator as follows
SqlParameter[] parameters = new SqlParameter[1];
SqlParameter planIndexPara...