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Should a “static final Logger” be declared in UPPER-CASE?
In Java, static final variables are constants and the convention is that they should be in upper-case. However, I have seen that most people declare loggers in lower-case which comes up as a violation in PMD .
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What is the Scala identifier “implicitly”?
...1) //
res23: AnyRef{def min(i: Int): Int} = 1
scala> .getClass
res24: java.lang.Class[_] = class scala.runtime.RichInt
Implicit Views can also be triggered when an expression does not conform to the Expected Type, as below:
scala> 1: scala.runtime.RichInt
res25: scala.runtime.RichInt = 1
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What is a WeakHashMap and when to use it? [duplicate]
...cted when nothing else references it. (BTW, a strong reference is a normal java reference). There are also weak references which tend not to be as readily collected as soft references (which don't tend to hang about for long after the last strong reference disappears)
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Java recursive Fibonacci sequence
...b(1) + fib(1) + fib(0)
-> 1 + 0 + 1 + 1 + 0
-> 3
I am not sure how Java actually evaluates this, but the result will be the same.
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IDEA: javac: source release 1.7 requires target release 1.7
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@Patrick, your pom.xml java compiler plug-in configuration may specify Java version that will override this setting next time you make changes to the pom.xml (if automatic reimport is enabled) or reimport the project manually.
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Font size of TextView in Android application changes on changing font size from native settings
...stom Application or BaseActivity
/**
* 重写 getResource 方法，防止系统字体影响
*
* @return
*/
@Override
public Resources getResources() {
Resources resources = super.getResources();
if (resources != null && resources.getConfiguration().fontScale != 1) {
Conf...
Evaluate empty or null JSTL c tags
...k blank string, I suggest following
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<c:if test="${empty fn:trim(var1)}">
</c:if>
It also handles nulls
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How to debug Lock wait timeout exceeded on MySQL?
... locks to avoid dirty-write anomalies as explained in the High-Performance Java Persistence book) are more likely to generate conflicts with other transactions.
Although InnoDB MVCC, you can still request explicit locks using the FOR UPDATE clause. However, unlike other popular DBs (Oracle, MSSQL, ...
How to install Hibernate Tools in Eclipse?
...r you enter the site, you will find "Hibernate Tools" under "JBoss Web and Java EE Development" / "JBoss Data Services"
– thedrs
Jun 19 '13 at 8:39
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Getting the name of the currently executing method
Is there a way to get the name of the currently executing method in Java?
22 Answers
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