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java get file size efficiently
While googling, I see that using java.io.File#length() can be slow.
FileChannel has a size() method that is available as well.
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Java heap terminology: young, old and permanent generations?
...What the concepts of young , old and permanent generations are in the Java heap terminology, and more specifically the interactions between the three generations.
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Convert Long into Integer
How to convert a Long value into an Integer value in Java?
14 Answers
14
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How can I increment a date by one day in Java?
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I'll quote some JavaDocs... Calendar.DATE: "...This is a synonym for DAY_OF_MONTH." I wish the JavaDocs would clarify that this would increment larger fields (like the month and year). Calendar.roll "Adds or subtracts (up/down) a single ...
Get __name__ of calling function's module in Python
...es.
>>> sys._current_frames()
{4052: <frame object at 0x03200C98>}
You can then "move up" using f_back :
>>> f = sys._current_frames().values()[0]
>>> # for python3: f = list(sys._current_frames().values())[0]
>>> print f.f_back.f_globals['__file__']
'/...
How do I output coloured text to a Linux terminal?
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98
Basics
I have written a C++ class which can be used to set the foreground and background color...
SQLAlchemy: print the actual query
...ues = (
5,
u'snowman: ☃',
b'UTF-8 snowman: \xe2\x98\x83',
datetime.now(),
Decimal('3.14159'),
10 ** 20, # a long integer
)
statement = select([mytable]).where(mytable.c.mycol.in_(values)).limit(1)
print(literalquery(statement))
if __n...
How to invoke a Linux shell command from Java
I am trying to execute some Linux commands from Java using redirection (>&) and pipes (|). How can Java invoke csh or bash commands?
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What's Up with Logging in Java? [closed]
...) - I don't think it is sensible to decide using this point as the reason.
Java logging because you don't want to add in an extra jar.
SLF4j because it's newer than Commons Logging and provides parameterized logging:
logger.debug("The entry is {}.", entry);
//which expands effectively to
if (log...
Is there a Null OutputStream in Java?
...r an API I'm using, but I don't actually have a need for the output. Does Java have an OutputStream equivalent to > /dev/null ?
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