java/lang/String.java

1278      * {@code String} object to be compared begins at index {@code toffset}
1283      * <ul><li>{@code toffset} is negative.
1285      * <li>{@code toffset+len} is greater than the length of this
1291      * {@code this.charAt(toffset + }<i>k</i>{@code ) != other.charAt(ooffset + }
1298      * @param   toffset   the starting offset of the subregion in this string.
1307     public boolean regionMatches(int toffset, String other, int ooffset, int len) {
1310         // Note: toffset, ooffset, or len might be near -1>>>1.
1311         if ((ooffset < 0) || (toffset < 0) ||
1312              (toffset > (long)length() - len) ||
1318                 toffset = toffset << 1;
1323                 if (tv[toffset++] != ov[ooffset++]) {
1330                     if (StringLatin1.getChar(tv, toffset++) !=
1337                     if (StringUTF16.getChar(tv, toffset++) !=
1355      * {@code toffset} and has length {@code len}. The substring of
1359      * <ul><li>{@code toffset} is negative.
1361      * <li>{@code toffset+len} is greater than the length of this
1368      * this.charAt(toffset+k) != other.charAt(ooffset+k)
1373      * Character.toLowerCase(Character.toUpperCase(this.charAt(toffset+k))) !=
1385      * @param   toffset      the starting offset of the subregion in this
1397     public boolean regionMatches(boolean ignoreCase, int toffset,
1400             return regionMatches(toffset, other, ooffset, len);
1402         // Note: toffset, ooffset, or len might be near -1>>>1.
1403         if ((ooffset < 0) || (toffset < 0)
1404                 || (toffset > (long)length() - len)
1412               ? StringLatin1.regionMatchesCI(tv, toffset, ov, ooffset, len)
1413               : StringUTF16.regionMatchesCI(tv, toffset, ov, ooffset, len);
1416               ? StringLatin1.regionMatchesCI_UTF16(tv, toffset, ov, ooffset, len)
1417               : StringUTF16.regionMatchesCI_Latin1(tv, toffset, ov, ooffset, len);
1425      * @param   toffset   where to begin looking in this string.
1428      *          at index {@code toffset}; {@code false} otherwise.
1429      *          The result is {@code false} if {@code toffset} is
1434      *          this.substring(toffset).startsWith(prefix)
1437     public boolean startsWith(String prefix, int toffset) {
1438         // Note: toffset might be near -1>>>1.
1439         if (toffset < 0 || toffset > length() - prefix.length()) {
1447             int to = isLatin1() ? toffset : toffset << 1;
1459                 if (StringUTF16.getChar(ta, toffset++) != (pa[po++] & 0xff)) {