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How to call getClass() from a static method in Java?
...()
Check the boxes to reformat and shorten FQ names.
Change the context to Java: declaration.
Now if you type log<tab> it'll automatically expand to
private static final Logger logger = LoggerFactory.getLogger(ClassName.class);
And automatically reformat and optimize the imports for you....
CharSequence VS String in Java?
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But keep in mind this caveat from the CharSequence javadoc: This interface does not refine the general contracts of the equals and hashCode methods. The result of comparing two objects that implement CharSequence is therefore, in general, undefined. Each object may be impleme...
How to use MDC with thread pools?
...f things that need to be processed in the background. For that we use the java.concurrent.ThreadPoolExecutor and java.util.Timer classes along with some self-rolled async execution services. All these services manage their own thread pool.
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Task not serializable: java.io.NotSerializableException when calling function outside closure only o
...}
object NOTworking extends App {
new Test().doIT
}
class Test extends java.io.Serializable {
val rddList = Spark.ctx.parallelize(List(1,2,3))
def doIT() = {
val after = rddList.map(someFunc)
after.collect().foreach(println)
}
def someFunc(a: Int) = a + 1
}
or you make someF...
Java: Literal percent sign in printf statement
I'm trying to add an actual percent sign into a printf statement in Java and I'm getting the error:
3 Answers
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What is the standard exception to throw in Java for not supported/implemented operations?
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java.lang.UnsupportedOperationException
Thrown to indicate that the requested operation is not supported.
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Java: possible to line break in a properties file?
Is it possible to continue a long string on the next line in a Java properties file?
3 Answers
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How to check whether a given string is valid JSON in Java
How do I validate a JSON string in Java? Or could I parse it using regular expressions?
19 Answers
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Split string with dot as delimiter
....' in the regular expression, and the other to escape the first one in the Java string)
Also I wouldn't suggest returning fn[0] since if you have a file named something.blabla.txt, which is a valid name you won't be returning the actual file name. Instead I think it's better if you use:
int idx = ...
Java Swing revalidate() vs repaint()
...e() or revalidate() is mandatory when you do a remove() - see the relevant javadocs.
My own testing indicates that repaint() is also necessary. I'm not sure exactly why.
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