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Java Immutable Collections
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Unmodifiable collections are usually read-only views (wrappers) of other collections. You can't add, remove or clear them, but the underlying collection can change.
Immutable collections can't be changed at all - they don't wrap another collection - they h...
How do I make Git ignore file mode (chmod) changes?
...it handles the
executable bit correctly and this variable is automatically
set as necessary.
A repository, however, may be on a filesystem that handles
the filemode correctly, and this variable is set to true when
created, but later may be made accessible from another
envir...
Is it possible to have SSL certificate for IP address, not domain name?
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I absolutely see your point with the cookies, you're totally right. But to switch to a SSL IP to save the few ms of DNS lookup sounds more hassle to me than it's worth. Plus, you may have issues taking your IP with you if you ever have to change your provider - it's probably not p...
What code analysis tools do you use for your Java projects? [closed]
...n rewrite them. Some of these tools come with applications or "hooks" that allow them to be extended. For example, PMD comes with the "designer" tool that allows you to create new rules. Also, Checkstyle has the DescendantToken check that has properties that allow for substantial customization.
I i...
bash: mkvirtualenv: command not found
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Solution 1:
For some reason, virtualenvwrapper.sh installed in /usr/bin/virtualenvwrapper.sh, instead of under /usr/local/bin.
The following in my .bash_profile works...
source "/usr/bin/virtualenvwrapper.sh"
export WORKON_HOME="/opt/virtual_env/"
My install seems to work fi...
How to change MySQL data directory?
...r/mysql
# Stop MySQL before copying over files
service mysql stop
# Copy all files in default directory, to new one, retaining perms (-p)
cp -rp /var/lib/mysql/* /new/dir/for/mysql/
Edit the /etc/my.cnf file, and under [mysqld] add this line:
datadir=/new/dir/for/mysql/
If you are using CageF...
Clear the entire history stack and start a new activity on Android
... need to close the application then while starting Activity B from A just call finish() this will prevent android from storing Activity A in to the Backstack.eg for activity A is Loding/Splash screen of application.
Intent newIntent = new Intent(A.this, B.class);
startActivity(newIntent);
finish();...
Safe String to BigDecimal conversion
...0,000,000.999999999999999";
BigDecimal money = new BigDecimal(value.replaceAll(",", ""));
System.out.println(money);
Full code to prove that no NumberFormatException is thrown:
import java.math.BigDecimal;
public class Tester {
public static void main(String[] args) {
// TODO Auto-...
Easy way of running the same junit test over and over?
...for some simple way to run JUnit 4.x tests several times in a row automatically using Eclipse.
12 Answers
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Create the perfect JPA entity [closed]
...nd your time on what's important.
Constructors: create a constructor with all required fields of the entity?
Constructor(s) for application logic, should have only a few critical "foreign key" or "type/kind" fields which will always be known when creating the entity. The rest should be set by call...