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In java how to get substring from a string till a character c?
...n just split the string..
public String[] split(String regex)
Note that java.lang.String.split uses delimiter's regular expression value.
Basically like this...
String filename = "abc.def.ghi"; // full file name
String[] parts = filename.split("\\."); // String array, each element is text be...
When do I need to use AtomicBoolean in Java?
... better than code
which uses Object level
monitors/synchronization. Since,
Java's synchronization mechanisms
makes code wait, when there are lots
of threads running through your
critical sections, a substantial
amount of CPU time is spent in
managing the synchronization
mechanism itself (waiting, no...
How to make a .jar out from an Android Studio project
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If you set up the code as a plain Java module in Gradle, then it's really easy to have Gradle give you a jar file with the contents. That jar file will have only your code, not the other Apache libraries it depends on. I'd recommend distributing it this way; ...
how to read System environment variable in Spring applicationContext
...ath:config_#{systemProperties['env']}/db.properties" />
Combined with java ... -Denv=QA should solve your problem.
Note also a comment by @yiling:
In order to access system environment variable, that is OS level
variables as amoe commented, we can simply use "systemEnvironment"
instead...
What's the difference between passing by reference vs. passing by value?
...s are "value types" and others are "reference types" -- among them are C#, Java, and JavaScript.
4There's nothing bad with recycling a fitting old term per se, but one has to somehow make it clear which meaning is used each time. Not doing that is exactly what keeps causing confusion.
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Why do Java webapps use .do extension? Where did it come from?
I have always wondered why so many Java developers use ".do" as the extension for their web controller (MVC) resources. Example: http://example.com/register.do
...
Dealing with “Xerces hell” in Java/Maven?
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When I try this, I get JavaMelody and Spring throwing java.lang.NoClassDefFoundError: org/w3c/dom/ElementTraversal at runtime.
– David Moles
May 28 '14 at 19:15
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Regex expressions in Java, \\s vs. \\s+
...nts the regex match from failing. from http://www.coderanch.com/t/570917/java/java/regex-difference
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Calling a Java method with no name
...answer. Find out more about initialization block at http://docs.oracle.com/javase/tutorial/java/javaOO/initial.html
– Stanley
Dec 4 '12 at 9:01
6
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Why does the JVM still not support tail-call optimization?
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Diagnosing Java Code: Improving the Performance of Your Java Code (alt) explains why the JVM does not support tail-call optimization.
But although it is well known how to automatically transform a tail-recursive function into a sim...