Develop Reference

How to get the the URI path for javax.ws.rs.core.UriInfo with parameters instead of values

When I get the UriInfo.getPath(), it returns me getFoo/12345/enable (12345 is the id).
I want to get it as, getFoo/id/enable instead.
Is there a straightforward approach? Or just parse the hell out of it?

Take a look at UrlInfo.getPathSegments(). Might be easier than "parsing the hell out of it." :)
https://jersey.java.net/apidocs/1.8/jersey/javax/ws/rs/core/UriInfo.html#getPathSegments()

Just format your first result and replace numeric value with id.
String path = "getFoo/12345/enable";
System.out.println(path.replaceAll("\\d+", "id"));
Output:
getFoo/id/enable

How to receive string array from servlet request in java [duplicate]

How can i send an Array with a HTTP Get request?
I'm Using GWT client to send the request.

I know this post is really old, but I have to reply because although BalusC's answer is marked as correct, it's not completely correct.
You have to write the query adding "[]" to foo like this:
foo[]=val1&foo[]=val2&foo[]=val3

That depends on what the target server accepts. There is no definitive standard for this. See also a.o. Wikipedia: Query string:
While there is no definitive standard, most web frameworks allow multiple values to be associated with a single field (e.g. field1=value1&field1=value2&field2=value3).[4][5]
Generally, when the target server uses a strong typed programming language like Java (Servlet), then you can just send them as multiple parameters with the same name. The API usually offers a dedicated method to obtain multiple parameter values as an array.
foo=value1&foo=value2&foo=value3
String[] foo = request.getParameterValues("foo"); // [value1, value2, value3]
The request.getParameter("foo") will also work on it, but it'll return only the first value.
String foo = request.getParameter("foo"); // value1
And, when the target server uses a weak typed language like PHP or RoR, then you need to suffix the parameter name with braces [] in order to trigger the language to return an array of values instead of a single value.
foo[]=value1&foo[]=value2&foo[]=value3
$foo = $_GET["foo"]; // [value1, value2, value3]
echo is_array($foo); // true
In case you still use foo=value1&foo=value2&foo=value3, then it'll return only the first value.
$foo = $_GET["foo"]; // value1
echo is_array($foo); // false
Do note that when you send foo[]=value1&foo[]=value2&foo[]=value3 to a Java Servlet, then you can still obtain them, but you'd need to use the exact parameter name including the braces.
String[] foo = request.getParameterValues("foo[]"); // [value1, value2, value3]

Displaying struts validations message

I want to display errors detected in an action class, I use:
errors.add(ActionErrors.GLOBAL_MESSAGE,
new ActionMessage("some_string_in_properties_file"));`
and it works fine. However, I have written some generic error messages, and I would like to reuse them, so I am trying to do this:
errors.add(ActionErrors.GLOBAL_MESSAGE,
new ActionMessage("string1_in_properties_file", "string2_in_properties_file"));
where string1 = <li>{0} is required.</li>.
Then it is displaying string2 is required. It is not replacing string2 with its value.
I even tried
errors.add(ActionErrors.GLOBAL_MESSAGE,
new ActionMessage("string1_in_properties_file",
new ActionMessage("string2_in_properties_file")));
then it is displaying string2[] is required. It is not replacing string2.
I know it can be done by hard-coding the value, but is there any other way?

Since you want to to fetch two key's value from Property file, and put it in global error key,
I would say, retrieve each value separately using
String sValue1 = getResources(request).getMessage(locale, "key1");
String sValue2 = getResources(request).getMessage(locale, "key2");
and then put it in your global error
errors.add(ActionErrors.GLOBAL_MESSAGE,sValue1+"<br/>"+sValue2);
Hope it help....

It's hard to tell you exactly what to do, since O don't know the code behind errors and ActionMessage. But you can, however, use String.format. Your code would look something like this
public class ActionErrors {
public static final String INVALID_INPUT "'%s' is not valid input.";
...
}
and
String input = "Cats";
String message = String.format(ActionErrors.INVALID_INPUT, input);
System.out.println(message);
The above will print
'Cats' is not valid input.

In Struts ActionMessage, you can specify value for your parameters {0}, {1}, {2}, {3} specified in your properties file, as follows:
errors.add(ActionErrors.GLOBAL_MESSAGE,
new ActionMessage("some_string_in_properties_file", "value1"));
Alternately:
errors.add(ActionErrors.GLOBAL_MESSAGE,
new ActionMessage("some_string_in_properties_file", "value1", "value2", "value3"));
value1..value3 can be of any type (as Struts expects an Object).
so your property:
string1 = <li>{0} is required.</li>
Will be replaced to:
<li>value1 is required.</li>
(If you specify your key as string1).

Let's say you have a properties file that defines some keys for messages, like so:
string1: <li>{0} is required.</li>
string2: Username
The ActionMessage class has a number of constructors that take a varying number of arguments. The first is a string representing the key that refers to a message - in your case, the key is string1 which corresponds to the message <li>{0} is required.</li>; with the {0} being a placeholder for some dynamic content.
The remaining possible arguments are Objects that represent the actual values you want to replace those placeholders. If you do new ActionMessage("string1", "string2") you're passing in the literal value string2, and you'll end up with output of <li>string2 is required.</li>.
What you need to do is replace "string2" with a method call that will get the value that corresponds to the key string2. This is where my knowledge of the problem runs out, though, so you'll need to do some research on this part for yourself.

Temporary displaying text (not dates) in a different language

I'm trying to display some message on the screen in a different language (but keeping the dates in the default language, uk_eng), depending on what user is looking at the screen. Being only a temporary setting I was wondering what's the best way to do it in Java.

You could have message bundles for each Locale. Load these and display them appropriately when you identify the user's Locale.
An example is at http://java.sun.com/developer/onlineTraining/Programming/BasicJava2/int.html
You could load these in a web app too like http://www.devsphere.com/mapping/docs/guide/internat.html

If I see the problem well, you want to display messages with MessageFormat like this:
Object[] arguments = {
new Integer(7),
new Date(System.currentTimeMillis()),
"a disturbance in the Force"
};
String result = MessageFormat.format(
"At {1,time} on {1,date}, there was {2} on planet {0,number,integer}.",
arguments);
(Example from javadoc)
I checked the source of the MessageFormat and I see that getLocale() is common for the whole message. You cannot make a distinct one for a parameter.
Why don't you make a parameter with the formatted date string itself? Like this:
Object[] arguments = {
new SimpleDateFormat("yyyyy.MMMMM.dd GGG hh:mm aaa", Locale.UK).format(new Date())
};
String result = MessageFormat.format(
"This is the date format which I always want independently of the locale: {1} ",
arguments);
The first parameter of the format methods may come from localized property files.

Can't get localized strings from xml files correctly

I've been racking my head with this...
I've got a localized strings.xml file in a values-en folder with this example string:
#string/my_string
The string has the following text stored in English: "My String"
When accessing the localized string via a layout, it works fine.
When I try to change it in code, that's where I get problems.
I store the string into an array of strings for later use. The 'context' is passed from my activity to a data class and used with this line of code:
dataStrings = new String[] { (String) context.getResources().getString(R.string.my_string) };
Later, I try to display this string, like so:
buttons[0].setText(dataStrings[0]);
It displays:
#string/my_string
How do I get it to display the string without '#string/', the proper localized string?

You can run getString() directly on the Context object; you don't need to run getResources(). However, this should do the same thing as you're currently doing so I don't think that's the source of your problem.
The first thing to confirm is that what you think is happening is happening. Either use the debugger to check that buttons[0] contains "#string/my_string" or try calling setText() with a hard-coded value to make sure the text is actually being updated on the correct button - e.g. buttons[0].setText("StackOverflow!");