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When do Java generics require
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First - I have to direct you to http://www.angelikalanger.com/GenericsFAQ/JavaGenericsFAQ.html -- she does an amazing job.
The basic idea is that you use
<T extends SomeClass>
when the actual parameter can be SomeClass or any subtype of it.
In your example,
Map<String, Class<? ext...
Command prompt won't change directory to another drive
I'm trying to compile some java (learning java currently), and to do so I need to change command-prompt's directory (using javac).
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Java ArrayList how to add elements at the beginning
...(list);
list.add(elementForTop);
Collections.reverse(list);
If you use Java 8 streams, this answer might interest you.
Analysis
Time Complexity: O(n)
Space Complexity: O(1)
Looking at the JDK implementation this has a O(n) time complexity so only suitable for very small lists.
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SQL parser library for Java [closed]
Is there an open-source Java library for parsing SQL statements?
7 Answers
7
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Is there a stopwatch in Java?
Is there a stopwatch in Java? On google I only find code of stopwatches which don't work - they always return 0 milliseconds.
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Gradle, “sourceCompatibility” vs “targetCompatibility”?
...ity and sourceCompatibility maps to -target release and -source release in javac. Source is basically the source language level and target is the level of the bytecode that is generated.
More details can be found in the javac the cross compilation section.
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Java EE 6 @javax.annotation.ManagedBean vs. @javax.inject.Named vs. @javax.faces.ManagedBean
I feel there is a little mess in the Java EE 6 spec. There are several sets of annotations.
3 Answers
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How to make System.out.println() shorter
...pets" plugin for your favorite text editor/IDE
Static Import
import static java.lang.System.out;
out.println("Hello World");
Explore JVM languages
Scala
println("Hello, World!")
Groovy
println "Hello, World!"
Jython
print "Hello, World!"
JRuby
puts "Hello, World!"
Clojure
(println "Hello, W...
Java to Clojure rewrite
...een asked by my company to rewrite a largish (50,000 single lines of code) Java application (a web app using JSP and servlets) in Clojure. Has anyone else got tips as to what I should watch out for?
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How can I pad a String in Java?
Is there some easy way to pad Strings in Java?
30 Answers
30
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