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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...
Cannot instantiate the type List [duplicate]
...s and should not be used or suggested for use in any new code targeted for Java 5+, end of story.
– Matt Ball
Oct 31 '11 at 22:15
...
What exactly is Apache Camel?
...h code samples. In it, Jonathan writes:
Apache Camel is an open source Java framework that focuses on making integration easier and more accessible to developers. It does this by providing:
concrete implementations of all the widely used Enterprise Integration Patterns (EIPs)
connectiv...
Spring .properties file: get element as an Array
...
base.module.elementToSearch=1,2,3,4,5,6
You can load such array in your Java class like this:
@Value("${base.module.elementToSearch}")
private String[] elementToSearch;
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How to simplify a null-safe compareTo() implementation?
...s (to be able to use Collections.sort() and other goodies offered by the Java platform):
17 Answers
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Sort a Map by values
I am relatively new to Java, and often find that I need to sort a Map<Key, Value> on the values.
58 Answers
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Scala best way of turning a Collection into a Map-by-key?
...ements, this Scala code is about 20 times slower than the straight-forward Java approach (create HashMap with appropriate size, loop over list, put elements into map). For 5,000 elements, Scala ist about 8 times slower. The loop approach written in Scala is roughly 3 times faster than the toMap vari...
Difference between Mutable objects and Immutable objects [duplicate]
...All( "old", "new" );
System.out.println( myString );
The output is:
java.awt.Point[0.0, 0.0]
java.awt.Point[1.0, 0.0]
old String
old String
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