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JRuby on Rails vs. Ruby on Rails, what's difference?
...s Ruby is a C implementation.
Key features to note are:
JRuby runs on Java VM's and it's either compiled or interpreted down to Java byte code.
JRuby can integrate with Java code. If you have Java class libraries (.jar's), you can reference and use them from within Ruby code with JRuby. In the ...
Develop Android app using C#
...Mono and dot42 are licensed products.
Personally, I would recommend using Java with the IntelliJ IDEA dev environment. I say this for 3 reasons:
There is so much Java code out there for Android already; do yourself a favour and don't re-invent the wheel.
IDEA is similar enough to Visual Studio as...
Sort objects in ArrayList by date?
...
Since Java 8 the List interface provides the sort method. Combined with lambda expression the easiest solution would be
// sort DateTime typed list
list.sort((d1,d2) -> d1.compareTo(d2));
// or an object which has an DateTime a...
Last iteration of enhanced for loop in java
...: ints) {
sb.append(delim).append(i);
delim = ",";
}
Update: For Java 8, you now have Collectors
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slf4j: how to log formatted message, object array, exception
...ew Exception("something went wrong")});
will yield
one two three: a b c
java.lang.Exception: something went wrong
at Example.main(Example.java:13)
at java.lang.reflect.Method.invoke(Method.java:597)
at ...
The exact output will depend on the underlying framework (e.g. logback, log4j...
Light weight alternative to Hibernate? [closed]
I have a single user java program that I would like to have store data in a light weight database such as Derby or Sqlite. I would like to use a data abstraction layer in my program. Hibernate appears to require a lot of configuration and is overkill for what I need. What are light weight alternativ...
Get specific ArrayList item
... have already told you:
mainList.get(3);
Be sure to check the ArrayList Javadoc.
Also, be careful with the arrays indices: in Java, the first element is at index 0. So if you are trying to get the third element, your solution would be mainList.get(2);
...
Why does Eclipse Java Package Explorer show question mark on some classes?
In the Eclipse Helios Java Package Explorer, I see the Java class icons display a small question mark to the right of the 'J', something like [J?]. This icon is shown on each class within one package in my project, but I cannot find an explanation for this in the documentation.
...
What is the difference between Class.this and this in Java
...uestions%2f5666134%2fwhat-is-the-difference-between-class-this-and-this-in-java%23new-answer', 'question_page');
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Is there a way to automatically generate getters and setters in Eclipse?
I am working on a new Android project ( Java ), and created an Object with a large number of variables. Since I am planning to add getters and setters for all of them, I was wondering: is there a shortcut in Eclipse for automatically generating the getters and setters in a given class?
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