Ejemplo

public static void main(String[] args){ String str = "\uFF10"; //$NON-NLS-1$ String str2 = "\uD800\uDC00"; //$NON-NLS-1$ int result = str.compareTo(str2); System.out.println("Resultado = " + result); //$NON-NLS-1$ str = "\ud801\udc00"; //$NON-NLS-1$ str2 = "\ud801\udc28"; //$NON-NLS-1$ result = str.compareToIgnoreCase(str2); System.out.println("Serie: Resultado(Omitir mayúsculas/minúsculas) = " + result); //$NON-NLS-1$ str = "k"; //$NON-NLS-1$ str2 = "y"; //$NON-NLS-1$ Locale.setDefault(new Locale("lt", "LT")); //$NON-NLS-1$ //$NON-NLS-2$ result = str.compareTo(str2); System.out.println("Serie: Resultado(entorno local) = " + result); //$NON-NLS-1$ }

public static void TestCompareTo() { String str = "\ud801\udc00"; String str2 = "\ud801\udc28"; String result = str.compareToIgnoreCase(str2); System.out.println("Serie: Resultado(Omitir mayúsculas/minúsculas) = " + result); }

public static void TestCompareTo() { String str = "k"; String str2 = "y"; Locale.setDefault(new Locale("lt", "LT")); result = str.compareTo(str2); System.out.println("Serie: Resultado(entorno local) = " + result); }

Solución

Si las series a comparar contienen caracteres suplementarios de Unicode (solo pueden utilizarse en series normalizadas) Utilice ICU 2.6.1 com.ibm.icu.text.UTF16.StringComparator (Object, Object) com.ibm.icu.text.UTF16.StringComparator (String, String) public static void main(String[] args){ String str = "\uFF10"; //$NON-NLS-1$ String str2 = "\uD800\uDC00"; //$NON-NLS-1$ UTF16.StringComparator compare = new UTF16.StringComparator(true, false, UTF16.StringComparator.FOLD_CASE_DEFAULT); int result = compare.compare(str, str2); System.out.println("UTF16.StringComparator: Resultado = " + result); //$NON-NLS-1$ str = "\ud801\udc00"; //$NON-NLS-1$ str2 = "\ud801\udc28"; //$NON-NLS-1$ UTF16.StringComparator compare2 = new UTF16.StringComparator(true, true, UTF16.StringComparator.FOLD_CASE_DEFAULT); result = compare2.compare(str, str2); System.out.println("UTF16.StringComparator: Resultado (Ignorar mayúsculas/minúsculas) = " + result); //$NON-NLS-1$ }

Solución

Si la comparación es sensible al entorno local o si la serie no está normalizada y es necesario utilizar los servicios de cotejo java.text.Collator.compare (Object, Object) java.text.Collator.compare (String, String) public static void main(String[] args){ Collator collator = Collator.getInstance(new Locale("lt", "LT")); //$NON-NLS-1$ //$NON-NLS-2$ String str = "k"; //$NON-NLS-1$ String str2 = "y"; //$NON-NLS-1$ int result = collator.compare(str, str2); System.out.println("Cotejador: Resultado (Entorno local) = " + result); //$NON-NLS-1$ }