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Execute method on startup in Spring
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I get a strange warning trying to use @PostConstruct in java 1.8: Access restriction: The type PostConstruct is not accessible due to restriction on required library /Library/Java/JavaVirtualMachines/jdk1.8.0_05.jdk/Contents/Home/jre/lib/rt.jar
– encrest
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Usages of Null / Nothing / Unit in Scala
...erlying
runtime system. A method with return type Unit is analogous to a Java
method which is declared void.
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Android - Package Name convention
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Android follows normal java package conventions plus here is an important snippet of text to read (this is important regarding the wide use of xml files while developing on android).
The reason for having it in reverse order is to do with the layo...
How to evaluate a math expression given in string form?
I'm trying to write a Java routine to evaluate math expressions from String values like:
25 Answers
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Simple explanation of clojure protocols
...but fail in one way or another: Interfaces and Extension Methods in C# and Java, Monkeypatching in Ruby, Python, ECMAScript.
Note that Clojure actually already has a mechanism for solving the Expression Problem: Multimethods. The problem that OO has with the EP is that they bundle operations and ty...
throws Exception in finally blocks
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If you're using Java 7, and resource implements AutoClosable, you can do this (using InputStream as an example):
try (InputStream resource = getInputStream()) {
// Use the resource.
}
catch( Exception ex ) {
// Problem with the resource...
Spring Boot: How can I set the logging level with application.properties?
...imple question, but I cannot find information.
(Maybe my knowledge about Java frameworks is severely lacking)
15 Answers
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Difference between List, List, List, List, and List
... (like in your point 3), requires that the type parameter be declared. The Java syntax for that is to put <T> in front of the function. This is exactly analogous to declaring formal parameter names to a method before using the names in the method body.
Regarding List<Object> not accepti...
What's the difference between and
... a pre-generics API that used Object.)
Source: http://download.oracle.com/javase/tutorial/extra/generics/convert.html; it explains why the JDK's java.util.Collections class has a method with this signature:
public static <T extends Object & Comparable<? super T>> T max(
Collect...
How to get a time zone from a location using latitude and longitude coordinates?
...Implementations that use the Timezone Boundary Builder data
node-geo-tz - JavaScript library (Node.js only)
timespace - JavaScript library
tz-lookup-oss - JavaScript library
GeoTimeZone - .NET library
Geo-Timezone - PHP library
timezonefinder - Python library
ZoneDetect - C library
Timeshape - Java...