日期:2014-05-20 浏览次数:20900 次
public String toUpperCase(Locale locale) { if (locale == null) { throw new NullPointerException(); } int firstLower; /* Now check if there are any characters that need to be changed. */ scan: { for (firstLower = 0 ; firstLower < count; ) { int c = (int)value[offset+firstLower]; int srcCount; if ((c >= Character.MIN_HIGH_SURROGATE) && (c <= Character.MAX_HIGH_SURROGATE)) { c = codePointAt(firstLower); srcCount = Character.charCount(c); } else { srcCount = 1; } int upperCaseChar = Character.toUpperCaseEx(c); if ((upperCaseChar == Character.ERROR) || (c != upperCaseChar)) { break scan; } firstLower += srcCount; } return this; } char[] result = new char[count]; /* may grow */ int resultOffset = 0; /* result may grow, so i+resultOffset * is the write location in result */ /* Just copy the first few upperCase characters. */ System.arraycopy(value, offset, result, 0, firstLower); String lang = locale.getLanguage(); boolean localeDependent = (lang == "tr" || lang == "az" || lang == "lt"); char[] upperCharArray; int upperChar; int srcChar; int srcCount; for (int i = firstLower; i < count; i += srcCount) { srcChar = (int)value[offset+i]; if ((char)srcChar >= Character.MIN_HIGH_SURROGATE && (char)srcChar <= Character.MAX_HIGH_SURROGATE) { srcChar = codePointAt(i); srcCount = Character.charCount(srcChar); } else { srcCount = 1; } if (localeDependent) { upperChar = ConditionalSpecialCasing.toUpperCaseEx(this, i, locale); } else { upperChar = Character.toUpperCaseEx(srcChar); } if ((upperChar == Character.ERROR) || (upperChar >= Character.MIN_SUPPLEMENTARY_CODE_POINT)) { if (upperChar == Character.ERROR) { if (localeDependent) { upperCharArray = ConditionalSpecialCasing.toUpperCaseCharArray(this, i, locale); } else { upperCharArray = Character.toUpperCaseCharArray(srcChar); } } else if (srcCount == 2) { resultOffset += Character.toChars(upperChar, result, i + resultOffset) - srcCount; continue; } else { upperCharArray = Character.toChars(upperChar); } /* Grow result if needed */ int mapLen = upperCharArray.length; if (mapLen > srcCount) { char[] result2 = new char[result.length + mapLen - srcCount]; System.arraycopy(result, 0, result2, 0, i + resultOffset); result = result2; } for (int x=0; x<mapLen; ++x) { result[i+resultOffset+x] = upperCharArray[x]; } resultOffset += (mapLen - srcCount); } else { result[i+resultOffset] = (char)upperChar; } } return new String(0, count+resultOffset, result); }