java barcode api javautil Part 2: More Utility Classes in Java

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javautil Part 2: More Utility Classes
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Systemoutprintln(coninnext()); else Systemoutprintln("Error!"); } }
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The output is 28 In the program, findInLine( ) is used to find an occurrence of the pattern Age Once found, the next token is read, which is the age Related to findInLine( ) is findWithinHorizon( ) It is shown here: String findWithinHorizon(Pattern pattern, int count) String findWithinHorizon(String pattern, int count) This method attempts to find an occurrence of the specified pattern within the next count characters If successful, it returns the matching pattern Otherwise, it returns null If count is zero, then all input is searched until either a match is found or the end of input is encountered You can bypass a pattern using skip( ), shown here: Scanner skip(Pattern pattern) Scanner skip(String pattern) If pattern is matched, skip( ) simply advances beyond it and returns a reference to the invoking object If pattern is not found, skip( ) throws NoSuchElementException Other Scanner methods include radix( ), which returns the default radix used by the Scanner; useRadix( ), which sets the radix; reset( ), which resets the scanner; and close( ), which closes the scanner
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The ResourceBundle, ListResourceBundle, and PropertyResourceBundle Classes
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The javautil package includes three classes that aid in the internationalization of your program The first is the abstract class ResourceBundle It defines methods that enable you to manage a collection of locale-sensitive resources, such as the strings that are used to label the user interface elements in your program You can define two or more sets of translated strings that support various languages, such as English, German, or Chinese, with each translation set residing in its own bundle You can then load the bundle appropriate to the current locale and use the strings to construct the program s user interface Resource bundles are identified by their family name (also called their base name) To the family name can be added a two-character lowercase language code which specifies the language In this case, if a requested locale matches the language code, then that version of the resource bundle is used For example, a resource bundle with a family name of SampleRB could have a German version called SampleRB_de and a Russian version called SampleRB_ru (Notice that an underscore links the family name to the language code) Therefore, if the locale is LocaleGERMAN, SampleRB_de will be used It is also possible to indicate specific variants of a language that relate to a specific country by specifying a country code after the language code A country code is a two-character uppercase identifier, such as AU for Australia or IN for India A country code is also preceded by an
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Part II:
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The Java Library
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underscore when linked to the resource bundle name A resource bundle that has only the family name is the default bundle It is used when no language-specific bundles are applicable
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NOTE The language codes are defined by ISO standard 639 and the country codes by ISO
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standard 3166 The methods defined by ResourceBundle are summarized in Table 18-17 One important point: null keys are not allowed and several of the methods will throw a NullPointerException if null is passed as the key Notice the nested class ResourceBundleControl It was added by Java SE 6 and is used to control the resource-bundle loading process There are two subclasses of ResourceBundle The first is PropertyResourceBundle, which manages resources by using property files PropertyResourceBundle adds no methods of
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Method static final void clearCache( ) static final void clearCache(ClassLoader ldr) boolean containsKey(String k) static final ResourceBundle getBundle(String familyName) Description Deletes all resource bundles from the cache that were loaded by the default class loader (Added by Java SE 6) Deletes all resource bundles from the cache that were loaded by ldr (Added by Java SE 6) Returns true if k is a key within the invoking resource bundle (or its parent) (Added by Java SE 6) Loads the resource bundle with a family name of familyName using the default locale and the default class loader Throws MissingResourceException if no resource bundle matching the family name specified by familyName is available Loads the resource bundle with a family name of familyName using the specified locale and the default class loader Throws MissingResourceException if no resource bundle matching the family name specified by familyName is available Loads the resource bundle with a family name of familyName using the specified locale and the specified class loader Throws MissingResourceException if no resource bundle matching the family name specified by familyName is available Loads the resource bundle with a family name of familyName using the default locale and the default class loader The loading process is under the control of cntl Throws MissingResourceException if no resource bundle matching the family name specified by familyName is available (Added by Java SE 6) Loads the resource bundle with a family name of familyName using the specified locale and the default class loader The loading process is under the control of cntl Throws MissingResourceException if no resource bundle matching the family name specified by familyName is available (Added by Java SE 6)
static final ResourceBundle getBundle(String familyName, Locale loc)
static ResourceBundle getBundle(String familyName, Locale loc, ClassLoader ldr) static final ResourceBundle getBundle(String familyName, ResourceBundleControl cntl)
static final ResourceBundle getBundle(String familyName, Locale loc, ResourceBundleControl cntl)
TABLE 18-17
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