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Difference between validate(), revalidate() and invalidate() in Swing GUI
... that multiple invalid containers must be refreshed later.
validate() performs relayout. It means invalid content is asked for all the sizes and all the subcomponents' sizes are set to proper values by LayoutManager.
revalidate() is just sum of both. It marks the container as invalid and performs ...
Why does writeObject throw java.io.NotSerializableException and how do I fix it?
I have this exception and I don't understand why it would be thrown or, how I should handle it.
3 Answers
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psql: FATAL: role “postgres” does not exist
...sing homebrew, see the comment from @user3402754 below.
Note that the error message does NOT talk about a missing database, it talks about a missing role. Later in the login process it might also stumble over the missing database.
But the first step is to check the missing role: What is the outpu...
How to escape hash character in URL
How to escape the # hash sign (sometimes known as number sign or pound sign) sent in the query string of a URL?
1 Answer
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What's wrong with using == to compare floats in Java?
According to this java.sun page == is the equality comparison operator for floating point numbers in Java.
21 Answers
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Rails: convert UTC DateTime to another time zone
...
time.in_time_zone(time_zone)
Example:
zone = ActiveSupport::TimeZone.new("Central Time (US & Canada)")
Time.now.in_time_zone(zone)
or just
Time.now.in_time_zone("Central Time (US & Canada)")
You can find the names of the ActiveSupport time zones by doing:
ActiveSupp...
How do I convert a org.w3c.dom.Document object to a String?
I want to convert a org.w3c.dom.Document object to a String. I'm using Java 6 and am open to using any (completely free) technology that is up to the task. I tried the solution from this thread -- Is there a more elegant way to convert an XML Document to a String in Java than this code? , where t...
Objective-C - Remove last character from string
In Objective-C for iOS, how would I remove the last character of a string using a button action?
4 Answers
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File path to resource in our war/WEB-INF folder?
... you can read a file from there in a servlet context. I don't know how to form the path to the resource though:
3 Answers
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How to design RESTful search/filtering? [closed]
... a search. You do not have to literally create something in a database in order to use a POST.
For example:
Accept: application/json
Content-Type: application/json
POST http://example.com/people/searches
{
"terms": {
"ssn": "123456789"
},
"order": { ... },
...
}
You are creating a...