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Is it possible to read the value of a annotation in java?
...Retention(RetentionPolicy.RUNTIME)
public @interface TestAnnotation {
String testText();
}
And a sample annotated method:
class TestClass {
@TestAnnotation(testText="zyx")
public void doSomething() {}
}
And a sample method in another class that prints the value of the testText:
M...
Printf width specifier to maintain precision of floating-point value
...o the necessary number of significant digits such that when scanning the string back in, the original floating point value is acquired?
...
Find a class somewhere inside dozens of JAR files?
...
To locate jars that match a given string:
find . -name \*.jar -exec grep -l YOUR_CLASSNAME {} \;
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Python ValueError: too many values to unpack [duplicate]
...s is a dict and by default you are iterating over just the keys (which are strings).
Since self.materials has more than two keys*, they can't be unpacked into the tuple "k, m", hence the ValueError exception is raised.
In Python 2.x, to iterate over the keys and the values (the tuple "k, m"), we u...
Create instance of generic type in Java?
...get();
}
}
You would construct this class like this:
SomeContainer<String> stringContainer = new SomeContainer<>(String::new);
The syntax String::new on that line is a constructor reference.
If your constructor takes arguments you can use a lambda expression instead:
SomeContain...
Returning a value from thread?
... Program
{
static bool done = false;
static void Main(string[] args)
{
BackgroundWorker bg = new BackgroundWorker();
bg.DoWork += new DoWorkEventHandler(bg_DoWork);
bg.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bg_RunWork...
Interfaces with static fields in java for sharing 'constants'
...ittenConstants
{
private KittenConstants() {}
public static final String KITTEN_SOUND = "meow";
public static final double KITTEN_CUTENESS_FACTOR = 1;
}
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Reading InputStream as UTF-8
...a 7 it is possible to write the provide the Charset as a Constant not as a String StandardCharsets.UTF_8
– tobijdc
Apr 16 '15 at 9:14
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How to get duplicate items from a list using LINQ? [duplicate]
I'm having a List<string> like:
9 Answers
9
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Regular expression to check if password is “8 characters including 1 uppercase letter, 1 special cha
...ng one uppercase letter: You can use the [A-Z]+ regular expression. If the string contains at least one upper case letter, this regular expression will yield true.
One special character: You can use either the \W which will match any character which is not a letter or a number or else, you can use s...