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Numbers length of JFormattedTextField mask Java

I'm developing an desktop application with java, right now I'm at the point of registering person data. One of the fields of the person form is "DocumentTextField" which holds the Identification Document and Number, that's why I tried to use a JFormattedTextField mask, to help user with the format to this field.
Basically, I just used the AbstracFormatterFactory to create the mask:
Mask = UU - ########## to get something like (PP-0123456789)
It does work perfecly on the fly, the user just type "pp0123456789" and the mask become this to "PP-0123456789" the point is the numbers length, as you can see on my mask, i declare 10 numbers (##########) but in fact, It could be lower than 10 numbers or even Higher. It does only work with 10 numbers, if user type lower than 10 numbers, the JFormattedTextField resset to empty, the same thing happen if user type more than 10 numbers.
is there any way to declare the range (numbers length) of this? some document are just 5 numbers (PP-01234).
Thank you so much in advance by reading this and trying to help.

I assume you're using Java 8 for your development. Are you seeing any kind of ParseException?
As per the documentation of the component: https://docs.oracle.com/javase/8/docs/api/javax/swing/text/MaskFormatter.html
When initially formatting a value if the length of the string is less than the length of the mask, two things can happen. Either the placeholder string will be used, or the placeholder character will be used. Precedence is given to the placeholder string.
According to the example:
MaskFormatter formatter = new MaskFormatter("###-####");
formatter.setPlaceholderCharacter('_');
setPlaceHolderCharacter method can help you with your problem.

Android studio strange warning

I'm new to code in Android Studio and when i set a integer in a text like this:
textview.setText(String.format("%d",1));
This code give me back a warning:
Implicitly using the default locale is a common source of bugs: Use String.format (Locale,...)
What is the correct code for put an integer in a .setText?
I founded more question on stackoverflow but don't apply to this.

What is the correct code for put an integer in a .setText?
You simply need to convert your int as a String, you can use Integer.toString(int) for this purpose.
Your code should then be:
textview.setText(Integer.toString(myInt));
If you want to set a fixed value simply use the corresponding String literal.
So here your code could simply be:
textview.setText("1");
You get this warning because String.format(String format, Object... args) will use the default locale for your instance of the Java Virtual Machine which could cause behavior change according to the chosen format since you could end up with a format locale dependent.
For example if you simply add a comma in your format to include the grouping characters, the result is now locale dependent as you can see in this example:
System.out.println(String.format(Locale.FRANCE, "10000 for FR is %,d", 10_000));
System.out.println(String.format(Locale.US, "10000 for US is %,d", 10_000));
Output:
10000 for FR is 10 000
10000 for US is 10,000

Android - Invalid Double "#,##"

A user of my app is having a error and the app is crashing
I've looked at the report and it's stating
Caused by: java.lang.NumberFormatException: Invalid double: "1,36"
I have reproduced the data inputted on my app and I don't have the issue at all
I have even asked her to send me her database so i can import the exact data and it still worked okay for me
I'm confused as to where the double is getting formatted like that as I can't see anywhere in my code where it would get formatted with a ,
Any suggestions as to what's going on?

Simple way is (do it above your parce):
if (str.contains(",")) {
str.replace(",",".");
}

I just have faced the same problem. I was converting float value to String. Yes, it must be a locale issue. As said in one of the comments, Some locales use , as a decimal separator.
Initially I was converting float like-
String.format("%.1f", value);
Then I changed the code to
String.format(Locale.ENGLISH, "%.1f", value);
So, forcing the string to be converted with English local worked for me.

You seem to have encountered a locale problem. Different locales have . and , as fractional part separator. You can use java.text.NumberFormat to work with the locale you want, e.g. FRANCE for comma and US for point:
// somewhere at Utils.java:
public static final NumberFormat DOUBLE_FORMAT = NumberFormat.getInstance(Locale.FRANCE);
// at call site:
double d = Utils.DOUBLE_FORMAT.parse("1,234").doubleValue();

How to customize number format in freemarker?

I am using freemarker and trying to display numbers in this format: $3,343,434.00 for example. This was easily taken care of by using ${total?string.currency} (assuming "total" is some number).
However, when I have negative numbers, it's showing them like this: ($343.34) instead of this: -$343.34. I need the negative sign instead of the parenthesis. Is there a way I could customize the formatting so it does everything that the string.currency did but replace the negative value behavior? I am relatively new to freemarker, so detailed responses are appreciated!

You can also try ?string(",##0.00"). However in this case you need to explicitly add $ and - sign would be after $ in case of negative numbers.
<#local total = 3343434/>
$ ${total?string(",##0.00")} //$ 3,343,434.00
<#local total = -3343434/>
$ ${total?string(",##0.00")} //$ -3,343,434.00
OR in case if you want what was expected you can replace the strings.
<#local total = -3343434/>
<#local total = "$ " + total?string(",##0.00")/>
${total?replace('$ -','- $')} //- $3,343,434.00

Update: Since FreeMarker 2.3.24 you can define named custom number formats, which can be an alias to a number format pattern (or even a formatter implemented in Java, but that level of flexibility isn't needed in this case). So add a custom number format called "money" as an alias to "¤,##0.00" to the FreeMarker configuration, and then you can write something like ${total?string.#money}. See: http://freemarker.org/docs/pgui_config_custom_formats.html
Currently FreeMarker just uses the formatting facility of the Java platform, so it's only as configurable as that (assuming you want to use ?string and ?string.somethingPredefiendHere). Which is not much... but, in general, the formatting categories provided by the Java platform is not fine-gradient enough anyway, I mean, you don't have application-domain categories like, price-of-product, a salary, a price on the stock, etc. (This demand is more frequent with non-currency numbers though.) So I think, generally, you want to make a formatter function, that you can use like ${salary(someNumber)}, ${price(someNumber)}, etc. Those functions can be implemented in a commonly #included/#imported template like a #function or in Java by using #assign salary = 'com.example.SalarayMethod'?new() in place of #function, where com.example.SalarayMethod is a TemplateMethodModelEx.

How about taking a mod of your number, convert it to the required string format and finally add a '-' prefix to the final string. You can retain the default format in just two steps.

Freemarker uses the currency formatting provided by the Java platform.
It requires a little tweaking of the DecimalFormat returned by NumberFormat.getCurrencyInstance() (which is what is called when you call .currency). You can see examples of it here.
However, that said it will likely be more effective for you to create a macro in freemarker to call which will handle your specific formatting.
Sorry for not having an example of what that macro would look like, but it's a good starter into macros in freemarker since you are just learning.
You might investigate if you can supply a custom format using the exposed configuration for number formats that will meet your needs.

If you want to maintain the default currency formatting (in case you need to use a locale other than '$'), you can just replace the parentheses like so:
${transaction.amount?string.currency?replace("(","-")?replace(")","")}
This will work without error regardless of if a number is negative or positive.
TIP: Make sure the number is actually a number with the ?number directive before converting to a currency format

Get currency symbol aka localeconv() in ColdFusion?

I'm doing some javascript work inside a ColdFusion shopping cart, and I need to be able to format some numbers in js which will mimic LScurrencyFormat() in CF.
Currently we are taking the first (left,1) character of a formatted string but that doesn't work for currencies like Yen or Euro which come after the number, not to mention any multiple character currency symbols.
What I need to find, based on the current CF locale, is
currency symbol
decimal delimiter (, or .)
leading or trailing (before or after the number)
From there i can run my own js formatting to make the formatted numbers come out as expected on the page.In php we can use localeconv() to get these values... how can I find them in CF?

I am not aware of any built in functions. However, you can obtain the first two items from java. As far as the third, the closest suggestion I have seen is to parse the localized number pattern and detect the position of the currency sign ie \u00A4. Note: It is just a mask placeholder. It is not the same as the actual currency symbols like "$" or "£".
Edit:
As discussed in the comments, getLocale() returns some user friendly name which unfortunately does not quite line up with java's. The easiest way to get the java locale object for the current request is using getPageContext().getResponse().getLocale().
<cfscript>
// Get the current locale as a java object
javaLocale = getPageContext().getResponse().getLocale();
// get numeric settings for that locale
currency = createObject("java", "java.text.DecimalFormat").getCurrencyInstance(javaLocale);
symbols = currency.getDecimalFormatSymbols();
// 164 => decimal code point for currency sign
currencyPattern = currency.toLocalizedPattern();
result.hasTrailingCurrencySymbol = currencyPattern.indexOf(javacast("int", 164)) > 0;
result.currencySymbol = symbols.getCurrencySymbol();
result.decimalSeparator= symbols.getDecimalSeparator();
WriteDump(result);
</cfscript>

getLocale() returns the old cf5 style locale "names" but only for those locales supported by cf5. if you dump out the supported locales (Server.Coldfusion.SupportedLocales) you'll see the goofy old cf5 style locale names as well as the core java locale IDs (ie both "Chinese(China)" and "zh_CN"). if your locale wasn't one of the cf5 supported locales you should see the core java locale ID (ie th_TH for thai, thailand). see
http://cfbugs.adobe.com/cfbugreport/flexbugui/cfbugtracker/main.html#bugId=82474
as a small tweak to leigh's answer, you should also be concerned with the currency/locale's fraction digits. for instance in normal practice, you can't have part of a yen (ie 1.1 isn't quite kosher). you can get that info from the Currency class's getDefaultFractionDigits() method:
result.fractionDigits=currency.getDefaultFractionDigits();