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Why should I use the keyword “final” on a method parameter in Java?
...ny such re-assignments.
In Retrospect
As noted in other answers…
Given Java's original design goal of helping programmers to avoid dumb mistakes such as reading past the end of an array, Java should have been designed to automatically enforce all parameter/argument variables as 'final'. In other...
How to run a background task in a servlet based web application?
I'm using Java and I want to keep a servlet continuously running in my application, but I'm not getting how to do it. My servlet has a method which gives counts of the user from a database on a daily basis as well as the total count of the users from the whole database. So I want to keep the servlet...
From Arraylist to Array
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JavaDocs are your friend. If the array being passed in is too small a new array is returned. The other version of the method that takes no args returns an array of Object
– Brian Roach
N...
What are the differences between a HashMap and a Hashtable in Java?
What are the differences between a HashMap and a Hashtable in Java?
35 Answers
35
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Java enum - why use toString instead of name
...ectly changes the toString() return, then it was already broken.
From the javadoc (emphasis mine) :
Returns a string representation of the object. In general, the
toString method returns a string that "textually represents" this
object. The result should be a concise but informative represe...
Java switch statement multiple cases
Just trying to figure out how to use many multiple cases for a Java switch statement. Here's an example of what I'm trying to do:
...
Who is calling the Java Thread interrupt() method if I'm not?
I've read and re-read Java Concurrency in Practice, I've read several threads here on the subject, I've read the IBM article Dealing with InterruptedException and yet there's something I'm simply not grasping which I think can be broken down into two questions:
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Importing a GitHub project into Eclipse
...ource code is imported but the created project created by Eclipse is not a java project.
Again normal.
When selecting the option "Use the new projects wizard" and creating a new java project using the wizard should'nt the code be automatically imported ?
No, that would only create an empty ...
Wrapping null-returning method in Java with Option in Scala?
... know whether it will return you a string or a null, because it comes from Java.
4 Answers
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How do I fix a NoSuchMethodError?
I'm getting a NoSuchMethodError error when running my Java program. What's wrong and how do I fix it?
28 Answers
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