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Integer.toString(int i) vs String.valueOf(int i)
...cal thing, but it is more useful for a developer to use the method valueOf from the String class than from the proper type, as it leads to fewer changes for us to make.
Sample 1:
public String doStuff(int num) {
// Do something with num...
return String.valueOf(num);
}
Sample2:
public ...
ERROR 1396 (HY000): Operation CREATE USER failed for 'jack'@'localhost'
... a bug. It is a documentation conspiracy - docs vary in one critical place from version to version.
13.7.1.2. DROP USER Syntax
...
DROP USER user [, user] ...
...
DROP USER 'jeffrey'@'localhost';
If you specify only the user name part of the account name, a host name part of '%' is use...
How to SSH to a VirtualBox guest externally through a host? [closed]
...Guest port", insert 22. Everything else of the rule can be left blank.
or from the command line
VBoxManage modifyvm myserver --natpf1 "ssh,tcp,,3022,,22"
where 'myserver' is the name of the created VM. Check the added rules:
VBoxManage showvminfo myserver | grep 'Rule'
That's all! Please be s...
Why does .NET use banker's rounding as default?
...own the page. Although I quite like the rep boost I get about once a week from this answer.
– Kibbee
Sep 9 '11 at 14:13
...
Add .gitignore to gitignore
...ignore file's purpose is to prevent everyone who collaborates on a project from accidentally commiting some common files in a project, such as generated cache files. Therefore you should not ignore .gitignore, since it's supposed to be included in the repository.
If you want to ignore files in just...
How can we programmatically detect which iOS version is device running on? [duplicate]
...n't handle well minor versions, it's sufficient if you need to recognize 5 from 6, but not 5.0.1 from 5.1.0
– Marek Sebera
Apr 4 '13 at 7:43
3
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getSupportActionBar from inside of Fragment ActionBarCompat
...ort library. I'm trying to figure out how to use the getSupportActionBar from within a fragment. My activity that hosts the fragment extends ActionBarActivity , but I don't see a similar support class for Fragments.
...
AES vs Blowfish for file encryption
...e that has the key in it, or maybe blackmailing your friend to copy a file from your computer. Those are going to be where you are most vulnerable, not the algorithm.
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What is the memory consumption of an object in Java?
...r 32-bit JVMs, the overhead is 8 bytes, padded to a multiple of 4 bytes. (From Dmitry Spikhalskiy's answer, Jayen's answer, and JavaWorld.)
Typically, references are 4 bytes on 32bit platforms or on 64bit platforms up to -Xmx32G; and 8 bytes above 32Gb (-Xmx32G). (See compressed object references...
What version of javac built my jar?
...
You can't tell from the JAR file itself, necessarily.
Download a hex editor and open one of the class files inside the JAR and look at byte offsets 4 through 7. The version information is built in.
http://en.wikipedia.org/wiki/Java_class...