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Java, Simplified check if int array contains int
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Here is Java 8 solution
public static boolean contains(final int[] arr, final int key) {
return Arrays.stream(arr).anyMatch(i -> i == key);
}
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Showing the stack trace from a running Python application
...what is most interesting is to dump all the stacks (which is more like the Java's dump). Here is an implementation based on this blog:
import threading, sys, traceback
def dumpstacks(signal, frame):
id2name = dict([(th.ident, th.name) for th in threading.enumerate()])
code = []
for thr...
How to inject dependencies into a self-instantiated object in Spring?
...ence how the autowiring happens: static.springsource.org/spring/docs/3.0.x/javadoc-api/org/…
– Sean Patrick Floyd
Sep 28 '10 at 14:29
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Reading InputStream as UTF-8
...fferedReader(new InputStreamReader(url.openStream(), "UTF-8"));
or since Java 7:
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream(), StandardCharsets.UTF_8));
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Is there an Eclipse line-width marker?
...I need to wrap every code line at 65 characters. I have set up the eclipse Java code formatter properly for this. But what I really want is a vertical line to be drawn in the editor showing where the max line width while I am typing, not just when I run the formmater. I know this feature is availabl...
What is the difference between up-casting and down-casting with respect to class variable
...use
Downcasting(or narrowing), and Downcasting is not directly possible in Java, explicitly we have to do.
Dog d = new Dog();
Animal a = (Animal) d; //Explicitly you have done upcasting. Actually no need, we can directly type cast like Animal a = d; compiler now treat Dog as Animal but still it i...
Backing beans (@ManagedBean) or CDI Beans (@Named)?
I've just started reading through Core JavaServer Faces, 3rd Ed. and they say this (emphasis mine):
5 Answers
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C# Set collection?
Does anyone know if there is a good equivalent to Java's Set collection in C#? I know that you can somewhat mimic a set using a Dictionary or a HashTable by populating but ignoring the values, but that's not a very elegant way.
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Would you, at present date, use JBoss or Glassfish (or another) as Java EE server for a new project?
If you started a new Java EE project today which is to be finished in about a year, which application server would you choose and why?
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Why is an array not assignable to Iterable?
with Java5 we can write:
5 Answers
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