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Is there any good dynamic SQL builder library in Java? [closed]
Anyone knows some good SQL builder library for Java like Squiggle (not maintained anymore it seems). Preferably, a project in active development.
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What is the default access modifier in Java? [duplicate]
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From Java documentation
If a class has no modifier (the default, also known as package-private), it is visible only within its own package (packages are named groups of related classes — you will learn about them in a later ...
How to create war files
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We'll assume that you have your code organized like:
${basedir}/src: Java files, properties, XML config files
${basedir}/web: Your JSP files
${basedir}/web/lib: Any JARs required at runtime
${basedir}/web/META-INF: Your manifest
${basedir}/web/WEB-INF: Your web.xml files
Set up
Define a set...
How to convert object array to string array in Java
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only on Java 1.6 and above
– newacct
Jul 5 '09 at 9:53
10
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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...
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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Why generate long serialVersionUID instead of a simple 1L?
...now should be compatible but which causes serialization to break.
See the Java Serialization Spec for more details.
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Converting a date string to a DateTime object using Joda Time library
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FYI, the troublesome old date-time classes such as java.util.Date, java.util.Calendar, and java.text.SimpleDateFormat are now legacy, supplanted by the java.time classes built into Java 8 & Java 9. See Tutorial by Oracle. And the java.time classes are thread-safe, unlike ...
How to call getClass() from a static method in Java?
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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....