| java.lang.Object
 java.lang.AbstractStringBuilder
| AbstractStringBuilder | | abstract class AbstractStringBuilder implements Appendable,CharSequence(Code) | | A mutable sequence of characters.
Implements a modifiable string. At any point in time it contains some
particular sequence of characters, but the length and content of the
sequence can be changed through certain method calls.
author:
Michael McCloskey
version:
1.22, 05/05/07
since:
1.5 |
| Field Summary | |
| int | count
The count is the number of characters used. | | char | value
The value is used for character storage. |
| Method Summary | |
| public AbstractStringBuilder | append(Object obj)
Appends the string representation of the Object
argument.
The argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then appended to this sequence.
Parameters:
obj - an Object. | | public AbstractStringBuilder | append(String str)
Appends the specified string to this character sequence.
The characters of the String argument are appended, in
order, increasing the length of this sequence by the length of the
argument. | | public AbstractStringBuilder | append(StringBuffer sb)
| | public AbstractStringBuilder | append(CharSequence s)
| | public AbstractStringBuilder | append(CharSequence s, int start, int end)
Appends a subsequence of the specified CharSequence to this
sequence.
Characters of the argument s, starting at
index start, are appended, in order, to the contents of
this sequence up to the (exclusive) index end. | | public AbstractStringBuilder | append(char str)
Appends the string representation of the char array
argument to this sequence. | | public AbstractStringBuilder | append(char str, int offset, int len)
Appends the string representation of a subarray of the
char array argument to this sequence.
Characters of the char array str, starting at
index offset, are appended, in order, to the contents
of this sequence. | | public AbstractStringBuilder | append(boolean b)
Appends the string representation of the boolean
argument to the sequence.
The argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then appended to this sequence. | | public AbstractStringBuilder | append(char c)
Appends the string representation of the char
argument to this sequence. | | public AbstractStringBuilder | append(int i)
Appends the string representation of the int
argument to this sequence. | | public AbstractStringBuilder | append(long l)
Appends the string representation of the long
argument to this sequence.
The argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then appended to this sequence.
Parameters:
l - a long. | | public AbstractStringBuilder | append(float f)
Appends the string representation of the float
argument to this sequence.
The argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then appended to this string sequence.
Parameters:
f - a float. | | public AbstractStringBuilder | append(double d)
Appends the string representation of the double
argument to this sequence.
The argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then appended to this sequence.
Parameters:
d - a double. | | public AbstractStringBuilder | appendCodePoint(int codePoint)
Appends the string representation of the codePoint
argument to this sequence. | | public int | capacity()
Returns the current capacity. | | public char | charAt(int index)
Returns the char value in this sequence at the specified index.
The first char value is at index 0, the next at index
1, and so on, as in array indexing.
The index argument must be greater than or equal to
0, and less than the length of this sequence.
If the char value specified by the index is a
surrogate, the surrogate
value is returned.
Parameters:
index - the index of the desired char value. | | public int | codePointAt(int index)
Returns the character (Unicode code point) at the specified
index. | | public int | codePointBefore(int index)
Returns the character (Unicode code point) before the specified
index. | | public int | codePointCount(int beginIndex, int endIndex)
Returns the number of Unicode code points in the specified text
range of this sequence. | | public AbstractStringBuilder | delete(int start, int end)
Removes the characters in a substring of this sequence.
The substring begins at the specified start and extends to
the character at index end - 1 or to the end of the
sequence if no such character exists. | | public AbstractStringBuilder | deleteCharAt(int index)
Removes the char at the specified position in this
sequence. | | public void | ensureCapacity(int minimumCapacity)
Ensures that the capacity is at least equal to the specified minimum.
If the current capacity is less than the argument, then a new internal
array is allocated with greater capacity. | | void | expandCapacity(int minimumCapacity)
This implements the expansion semantics of ensureCapacity with no
size check or synchronization. | | public void | getChars(int srcBegin, int srcEnd, char dst, int dstBegin)
Characters are copied from this sequence into the
destination character array dst. | | final char[] | getValue()
Needed by String for the contentEquals method. | | public int | indexOf(String str)
Returns the index within this string of the first occurrence of the
specified substring. | | public int | indexOf(String str, int fromIndex)
Returns the index within this string of the first occurrence of the
specified substring, starting at the specified index. | | public AbstractStringBuilder | insert(int index, char str, int offset, int len)
Inserts the string representation of a subarray of the str
array argument into this sequence. | | public AbstractStringBuilder | insert(int offset, Object obj)
Inserts the string representation of the Object
argument into this character sequence.
The second argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then inserted into this sequence at the indicated
offset. | | public AbstractStringBuilder | insert(int offset, String str)
Inserts the string into this character sequence.
The characters of the String argument are inserted, in
order, into this sequence at the indicated offset, moving up any
characters originally above that position and increasing the length
of this sequence by the length of the argument. | | public AbstractStringBuilder | insert(int offset, char str)
Inserts the string representation of the char array
argument into this sequence.
The characters of the array argument are inserted into the
contents of this sequence at the position indicated by
offset. | | public AbstractStringBuilder | insert(int dstOffset, CharSequence s)
Inserts the specified CharSequence into this sequence. | | public AbstractStringBuilder | insert(int dstOffset, CharSequence s, int start, int end)
Inserts a subsequence of the specified CharSequence into
this sequence.
The subsequence of the argument s specified by
start and end are inserted,
in order, into this sequence at the specified destination offset, moving
up any characters originally above that position. | | public AbstractStringBuilder | insert(int offset, boolean b)
Inserts the string representation of the boolean
argument into this sequence. | | public AbstractStringBuilder | insert(int offset, char c)
Inserts the string representation of the char
argument into this sequence. | | public AbstractStringBuilder | insert(int offset, int i)
Inserts the string representation of the second int
argument into this sequence. | | public AbstractStringBuilder | insert(int offset, long l)
Inserts the string representation of the long
argument into this sequence. | | public AbstractStringBuilder | insert(int offset, float f)
Inserts the string representation of the float
argument into this sequence. | | public AbstractStringBuilder | insert(int offset, double d)
Inserts the string representation of the double
argument into this sequence.
The second argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then inserted into this sequence at the indicated
offset. | | public int | lastIndexOf(String str)
Returns the index within this string of the rightmost occurrence
of the specified substring. | | public int | lastIndexOf(String str, int fromIndex)
Returns the index within this string of the last occurrence of the
specified substring. | | public int | length()
Returns the length (character count). | | public int | offsetByCodePoints(int index, int codePointOffset)
Returns the index within this sequence that is offset from the
given index by codePointOffset code
points. | | public AbstractStringBuilder | replace(int start, int end, String str)
Replaces the characters in a substring of this sequence
with characters in the specified String. | | public AbstractStringBuilder | reverse()
Causes this character sequence to be replaced by the reverse of
the sequence. | | public void | setCharAt(int index, char ch)
The character at the specified index is set to ch. | | public void | setLength(int newLength)
Sets the length of the character sequence.
The sequence is changed to a new character sequence
whose length is specified by the argument. | | public CharSequence | subSequence(int start, int end)
Returns a new character sequence that is a subsequence of this sequence.
An invocation of this method of the form
sb.subSequence(begin, end)
behaves in exactly the same way as the invocation
sb.substring(begin, end)
This method is provided so that this class can
implement the
CharSequence interface. | | public String | substring(int start)
Returns a new String that contains a subsequence of
characters currently contained in this character sequence. | | public String | substring(int start, int end)
Returns a new String that contains a subsequence of
characters currently contained in this sequence. | | abstract public String | toString()
Returns a string representing the data in this sequence.
A new String object is allocated and initialized to
contain the character sequence currently represented by this
object. | | public void | trimToSize()
Attempts to reduce storage used for the character sequence.
If the buffer is larger than necessary to hold its current sequence of
characters, then it may be resized to become more space efficient. |
| count | | int count(Code) | | The count is the number of characters used.
|
| value | | char value(Code) | | The value is used for character storage.
|
| AbstractStringBuilder | | AbstractStringBuilder()(Code) | | This no-arg constructor is necessary for serialization of subclasses.
|
| AbstractStringBuilder | | AbstractStringBuilder(int capacity)(Code) | | Creates an AbstractStringBuilder of the specified capacity.
|
| append | | public AbstractStringBuilder append(Object obj)(Code) | | Appends the string representation of the Object
argument.
The argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then appended to this sequence.
Parameters:
obj - an Object. a reference to this object. |
| append | | public AbstractStringBuilder append(String str)(Code) | | Appends the specified string to this character sequence.
The characters of the String argument are appended, in
order, increasing the length of this sequence by the length of the
argument. If str is null, then the four
characters "null" are appended.
Let n be the length of this character sequence just prior to
execution of the append method. Then the character at
index k in the new character sequence is equal to the character
at index k in the old character sequence, if k is less
than n; otherwise, it is equal to the character at index
k-n in the argument str.
Parameters:
str - a string. a reference to this object. |
| append | | public AbstractStringBuilder append(CharSequence s, int start, int end)(Code) | | Appends a subsequence of the specified CharSequence to this
sequence.
Characters of the argument s, starting at
index start, are appended, in order, to the contents of
this sequence up to the (exclusive) index end. The length
of this sequence is increased by the value of end - start.
Let n be the length of this character sequence just prior to
execution of the append method. Then the character at
index k in this character sequence becomes equal to the
character at index k in this sequence, if k is less than
n; otherwise, it is equal to the character at index
k+start-n in the argument s.
If s is null, then this method appends
characters as if the s parameter was a sequence containing the four
characters "null".
Parameters:
s - the sequence to append.
Parameters:
start - the starting index of the subsequence to be appended.
Parameters:
end - the end index of the subsequence to be appended. a reference to this object.
throws:
IndexOutOfBoundsException - ifstart or end are negative, orstart is greater than end orend is greater than s.length() |
| append | | public AbstractStringBuilder append(char str)(Code) | | Appends the string representation of the char array
argument to this sequence.
The characters of the array argument are appended, in order, to
the contents of this sequence. The length of this sequence
increases by the length of the argument.
The overall effect is exactly as if the argument were converted to
a string by the method
String.valueOf(char[]) and the
characters of that string were then
AbstractStringBuilder.append(String) appended
to this character sequence.
Parameters:
str - the characters to be appended. a reference to this object. |
| append | | public AbstractStringBuilder append(char str, int offset, int len)(Code) | | Appends the string representation of a subarray of the
char array argument to this sequence.
Characters of the char array str, starting at
index offset, are appended, in order, to the contents
of this sequence. The length of this sequence increases
by the value of len.
The overall effect is exactly as if the arguments were converted to
a string by the method
String.valueOf(char[]intint) and the
characters of that string were then
AbstractStringBuilder.append(String) appended to this character sequence.
Parameters:
str - the characters to be appended.
Parameters:
offset - the index of the first char to append.
Parameters:
len - the number of chars to append. a reference to this object. |
| append | | public AbstractStringBuilder append(boolean b)(Code) | | Appends the string representation of the boolean
argument to the sequence.
The argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then appended to this sequence.
Parameters:
b - a boolean. a reference to this object. |
| append | | public AbstractStringBuilder append(char c)(Code) | | Appends the string representation of the char
argument to this sequence.
The argument is appended to the contents of this sequence.
The length of this sequence increases by 1.
The overall effect is exactly as if the argument were converted to
a string by the method
String.valueOf(char) and the character
in that string were then
AbstractStringBuilder.append(String) appended to this
character sequence.
Parameters:
c - a char. a reference to this object. |
| append | | public AbstractStringBuilder append(int i)(Code) | | Appends the string representation of the int
argument to this sequence.
The argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then appended to this sequence.
Parameters:
i - an int. a reference to this object. |
| append | | public AbstractStringBuilder append(long l)(Code) | | Appends the string representation of the long
argument to this sequence.
The argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then appended to this sequence.
Parameters:
l - a long. a reference to this object. |
| append | | public AbstractStringBuilder append(float f)(Code) | | Appends the string representation of the float
argument to this sequence.
The argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then appended to this string sequence.
Parameters:
f - a float. a reference to this object. |
| append | | public AbstractStringBuilder append(double d)(Code) | | Appends the string representation of the double
argument to this sequence.
The argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then appended to this sequence.
Parameters:
d - a double. a reference to this object. |
| appendCodePoint | | public AbstractStringBuilder appendCodePoint(int codePoint)(Code) | | Appends the string representation of the codePoint
argument to this sequence.
The argument is appended to the contents of this sequence.
The length of this sequence increases by
Character.charCount(int) Character.charCount(codePoint) .
The overall effect is exactly as if the argument were
converted to a char array by the method
Character.toChars(int) and the character in that array were
then
AbstractStringBuilder.append(char[]) appended to this character
sequence.
Parameters:
codePoint - a Unicode code point a reference to this object.
exception:
IllegalArgumentException - if the specifiedcodePoint isn't a valid Unicode code point |
| capacity | | public int capacity()(Code) | | Returns the current capacity. The capacity is the amount of storage
available for newly inserted characters, beyond which an allocation
will occur.
the current capacity |
| charAt | | public char charAt(int index)(Code) | | Returns the char value in this sequence at the specified index.
The first char value is at index 0, the next at index
1, and so on, as in array indexing.
The index argument must be greater than or equal to
0, and less than the length of this sequence.
If the char value specified by the index is a
surrogate, the surrogate
value is returned.
Parameters:
index - the index of the desired char value. the char value at the specified index.
throws:
IndexOutOfBoundsException - if index is negative or greater than or equal to length(). |
| codePointAt | | public int codePointAt(int index)(Code) | | Returns the character (Unicode code point) at the specified
index. The index refers to char values
(Unicode code units) and ranges from 0 to
AbstractStringBuilder.length() - 1.
If the char value specified at the given index
is in the high-surrogate range, the following index is less
than the length of this sequence, and the
char value at the following index is in the
low-surrogate range, then the supplementary code point
corresponding to this surrogate pair is returned. Otherwise,
the char value at the given index is returned.
Parameters:
index - the index to the char values the code point value of the character at theindex
exception:
IndexOutOfBoundsException - if the indexargument is negative or not less than the length of thissequence. |
| codePointBefore | | public int codePointBefore(int index)(Code) | | Returns the character (Unicode code point) before the specified
index. The index refers to char values
(Unicode code units) and ranges from 1 to
AbstractStringBuilder.length() .
If the char value at (index - 1)
is in the low-surrogate range, (index - 2) is not
negative, and the char value at (index -
2) is in the high-surrogate range, then the
supplementary code point value of the surrogate pair is
returned. If the char value at index -
1 is an unpaired low-surrogate or a high-surrogate, the
surrogate value is returned.
Parameters:
index - the index following the code point that should be returned the Unicode code point value before the given index.
exception:
IndexOutOfBoundsException - if the indexargument is less than 1 or greater than the lengthof this sequence. |
| codePointCount | | public int codePointCount(int beginIndex, int endIndex)(Code) | | Returns the number of Unicode code points in the specified text
range of this sequence. The text range begins at the specified
beginIndex and extends to the char at
index endIndex - 1. Thus the length (in
chars) of the text range is
endIndex-beginIndex. Unpaired surrogates within
this sequence count as one code point each.
Parameters:
beginIndex - the index to the first char ofthe text range.
Parameters:
endIndex - the index after the last char ofthe text range. the number of Unicode code points in the specified textrange
exception:
IndexOutOfBoundsException - if thebeginIndex is negative, or endIndexis larger than the length of this sequence, orbeginIndex is larger than endIndex. |
| delete | | public AbstractStringBuilder delete(int start, int end)(Code) | | Removes the characters in a substring of this sequence.
The substring begins at the specified start and extends to
the character at index end - 1 or to the end of the
sequence if no such character exists. If
start is equal to end, no changes are made.
Parameters:
start - The beginning index, inclusive.
Parameters:
end - The ending index, exclusive. This object.
throws:
StringIndexOutOfBoundsException - if startis negative, greater than length(), orgreater than end. |
| deleteCharAt | | public AbstractStringBuilder deleteCharAt(int index)(Code) | | Removes the char at the specified position in this
sequence. This sequence is shortened by one char.
Note: If the character at the given index is a supplementary
character, this method does not remove the entire character. If
correct handling of supplementary characters is required,
determine the number of chars to remove by calling
Character.charCount(thisSequence.codePointAt(index)),
where thisSequence is this sequence.
Parameters:
index - Index of char to remove This object.
throws:
StringIndexOutOfBoundsException - if the indexis negative or greater than or equal tolength(). |
| ensureCapacity | | public void ensureCapacity(int minimumCapacity)(Code) | | Ensures that the capacity is at least equal to the specified minimum.
If the current capacity is less than the argument, then a new internal
array is allocated with greater capacity. The new capacity is the
larger of:
- The
minimumCapacity argument.
- Twice the old capacity, plus
2.
If the minimumCapacity argument is nonpositive, this
method takes no action and simply returns.
Parameters:
minimumCapacity - the minimum desired capacity. |
| expandCapacity | | void expandCapacity(int minimumCapacity)(Code) | | This implements the expansion semantics of ensureCapacity with no
size check or synchronization.
|
| getChars | | public void getChars(int srcBegin, int srcEnd, char dst, int dstBegin)(Code) | | Characters are copied from this sequence into the
destination character array dst. The first character to
be copied is at index srcBegin; the last character to
be copied is at index srcEnd-1. The total number of
characters to be copied is srcEnd-srcBegin. The
characters are copied into the subarray of dst starting
at index dstBegin and ending at index:
dstbegin + (srcEnd-srcBegin) - 1
Parameters:
srcBegin - start copying at this offset.
Parameters:
srcEnd - stop copying at this offset.
Parameters:
dst - the array to copy the data into.
Parameters:
dstBegin - offset into dst.
throws:
NullPointerException - if dst is null.
throws:
IndexOutOfBoundsException - if any of the following is true:srcBegin is negativedstBegin is negative- the
srcBegin argument is greater than the srcEnd argument. srcEnd is greater than this.length().dstBegin+srcEnd-srcBegin is greater than dst.length
|
| getValue | | final char[] getValue()(Code) | | Needed by String for the contentEquals method.
|
| indexOf | | public int indexOf(String str)(Code) | | Returns the index within this string of the first occurrence of the
specified substring. The integer returned is the smallest value
k such that:
this.toString().startsWith(str, k)
is true.
Parameters:
str - any string. if the string argument occurs as a substring within thisobject, then the index of the first character of the firstsuch substring is returned; if it does not occur as asubstring, -1 is returned.
throws:
java.lang.NullPointerException - if str is null. |
| indexOf | | public int indexOf(String str, int fromIndex)(Code) | | Returns the index within this string of the first occurrence of the
specified substring, starting at the specified index. The integer
returned is the smallest value k for which:
k >= Math.min(fromIndex, str.length()) &&
this.toString().startsWith(str, k)
If no such value of k exists, then -1 is returned.
Parameters:
str - the substring for which to search.
Parameters:
fromIndex - the index from which to start the search. the index within this string of the first occurrence of thespecified substring, starting at the specified index.
throws:
java.lang.NullPointerException - if str isnull. |
| insert | | public AbstractStringBuilder insert(int index, char str, int offset, int len)(Code) | | Inserts the string representation of a subarray of the str
array argument into this sequence. The subarray begins at the
specified offset and extends len chars.
The characters of the subarray are inserted into this sequence at
the position indicated by index. The length of this
sequence increases by len chars.
Parameters:
index - position at which to insert subarray.
Parameters:
str - A char array.
Parameters:
offset - the index of the first char in subarray tobe inserted.
Parameters:
len - the number of chars in the subarray tobe inserted. This object
throws:
StringIndexOutOfBoundsException - if indexis negative or greater than length(), oroffset or len are negative, or(offset+len) is greater thanstr.length. |
| insert | | public AbstractStringBuilder insert(int offset, Object obj)(Code) | | Inserts the string representation of the Object
argument into this character sequence.
The second argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then inserted into this sequence at the indicated
offset.
The offset argument must be greater than or equal to
0, and less than or equal to the length of this
sequence.
Parameters:
offset - the offset.
Parameters:
obj - an Object. a reference to this object.
throws:
StringIndexOutOfBoundsException - if the offset is invalid. |
| insert | | public AbstractStringBuilder insert(int offset, String str)(Code) | | Inserts the string into this character sequence.
The characters of the String argument are inserted, in
order, into this sequence at the indicated offset, moving up any
characters originally above that position and increasing the length
of this sequence by the length of the argument. If
str is null, then the four characters
"null" are inserted into this sequence.
The character at index k in the new character sequence is
equal to:
- the character at index k in the old character sequence, if
k is less than
offset
- the character at index k
-offset in the
argument str, if k is not less than
offset but is less than offset+str.length()
- the character at index k
-str.length() in the
old character sequence, if k is not less than
offset+str.length()
The offset argument must be greater than or equal to
0, and less than or equal to the length of this
sequence.
Parameters:
offset - the offset.
Parameters:
str - a string. a reference to this object.
throws:
StringIndexOutOfBoundsException - if the offset is invalid. |
| insert | | public AbstractStringBuilder insert(int offset, char str)(Code) | | Inserts the string representation of the char array
argument into this sequence.
The characters of the array argument are inserted into the
contents of this sequence at the position indicated by
offset. The length of this sequence increases by
the length of the argument.
The overall effect is exactly as if the argument were converted to
a string by the method
String.valueOf(char[]) and the
characters of that string were then
AbstractStringBuilder.insert(int,String) inserted into this
character sequence at the position indicated by
offset.
Parameters:
offset - the offset.
Parameters:
str - a character array. a reference to this object.
throws:
StringIndexOutOfBoundsException - if the offset is invalid. |
| insert | | public AbstractStringBuilder insert(int dstOffset, CharSequence s)(Code) | | Inserts the specified CharSequence into this sequence.
The characters of the CharSequence argument are inserted,
in order, into this sequence at the indicated offset, moving up
any characters originally above that position and increasing the length
of this sequence by the length of the argument s.
The result of this method is exactly the same as if it were an
invocation of this object's insert(dstOffset, s, 0, s.length()) method.
If s is null, then the four characters
"null" are inserted into this sequence.
Parameters:
dstOffset - the offset.
Parameters:
s - the sequence to be inserted a reference to this object.
throws:
IndexOutOfBoundsException - if the offset is invalid. |
| insert | | public AbstractStringBuilder insert(int dstOffset, CharSequence s, int start, int end)(Code) | | Inserts a subsequence of the specified CharSequence into
this sequence.
The subsequence of the argument s specified by
start and end are inserted,
in order, into this sequence at the specified destination offset, moving
up any characters originally above that position. The length of this
sequence is increased by end - start.
The character at index k in this sequence becomes equal to:
- the character at index k in this sequence, if
k is less than
dstOffset
- the character at index k
+start-dstOffset in
the argument s, if k is greater than or equal to
dstOffset but is less than dstOffset+end-start
- the character at index k
-(end-start) in this
sequence, if k is greater than or equal to
dstOffset+end-start
The dstOffset argument must be greater than or equal to
0, and less than or equal to the length of this
sequence.
The start argument must be nonnegative, and not greater than
end.
The end argument must be greater than or equal to
start, and less than or equal to the length of s.
If s is null, then this method inserts
characters as if the s parameter was a sequence containing the four
characters "null".
Parameters:
dstOffset - the offset in this sequence.
Parameters:
s - the sequence to be inserted.
Parameters:
start - the starting index of the subsequence to be inserted.
Parameters:
end - the end index of the subsequence to be inserted. a reference to this object.
throws:
IndexOutOfBoundsException - if dstOffsetis negative or greater than this.length(), orstart or end are negative, orstart is greater than end orend is greater than s.length() |
| insert | | public AbstractStringBuilder insert(int offset, boolean b)(Code) | | Inserts the string representation of the boolean
argument into this sequence.
The second argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then inserted into this sequence at the indicated
offset.
The offset argument must be greater than or equal to
0, and less than or equal to the length of this
sequence.
Parameters:
offset - the offset.
Parameters:
b - a boolean. a reference to this object.
throws:
StringIndexOutOfBoundsException - if the offset is invalid. |
| insert | | public AbstractStringBuilder insert(int offset, char c)(Code) | | Inserts the string representation of the char
argument into this sequence.
The second argument is inserted into the contents of this sequence
at the position indicated by offset. The length
of this sequence increases by one.
The overall effect is exactly as if the argument were converted to
a string by the method
String.valueOf(char) and the character
in that string were then
AbstractStringBuilder.insert(int,String) inserted into
this character sequence at the position indicated by
offset.
The offset argument must be greater than or equal to
0, and less than or equal to the length of this
sequence.
Parameters:
offset - the offset.
Parameters:
c - a char. a reference to this object.
throws:
IndexOutOfBoundsException - if the offset is invalid. |
| insert | | public AbstractStringBuilder insert(int offset, int i)(Code) | | Inserts the string representation of the second int
argument into this sequence.
The second argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then inserted into this sequence at the indicated
offset.
The offset argument must be greater than or equal to
0, and less than or equal to the length of this
sequence.
Parameters:
offset - the offset.
Parameters:
i - an int. a reference to this object.
throws:
StringIndexOutOfBoundsException - if the offset is invalid. |
| insert | | public AbstractStringBuilder insert(int offset, long l)(Code) | | Inserts the string representation of the long
argument into this sequence.
The second argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then inserted into this sequence at the position
indicated by offset.
The offset argument must be greater than or equal to
0, and less than or equal to the length of this
sequence.
Parameters:
offset - the offset.
Parameters:
l - a long. a reference to this object.
throws:
StringIndexOutOfBoundsException - if the offset is invalid. |
| insert | | public AbstractStringBuilder insert(int offset, float f)(Code) | | Inserts the string representation of the float
argument into this sequence.
The second argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then inserted into this sequence at the indicated
offset.
The offset argument must be greater than or equal to
0, and less than or equal to the length of this
sequence.
Parameters:
offset - the offset.
Parameters:
f - a float. a reference to this object.
throws:
StringIndexOutOfBoundsException - if the offset is invalid. |
| insert | | public AbstractStringBuilder insert(int offset, double d)(Code) | | Inserts the string representation of the double
argument into this sequence.
The second argument is converted to a string as if by the method
String.valueOf, and the characters of that
string are then inserted into this sequence at the indicated
offset.
The offset argument must be greater than or equal to
0, and less than or equal to the length of this
sequence.
Parameters:
offset - the offset.
Parameters:
d - a double. a reference to this object.
throws:
StringIndexOutOfBoundsException - if the offset is invalid. |
| lastIndexOf | | public int lastIndexOf(String str)(Code) | | Returns the index within this string of the rightmost occurrence
of the specified substring. The rightmost empty string "" is
considered to occur at the index value this.length().
The returned index is the largest value k such that
this.toString().startsWith(str, k)
is true.
Parameters:
str - the substring to search for. if the string argument occurs one or more times as a substringwithin this object, then the index of the first character ofthe last such substring is returned. If it does not occur asa substring, -1 is returned.
throws:
java.lang.NullPointerException - if str is null. |
| lastIndexOf | | public int lastIndexOf(String str, int fromIndex)(Code) | | Returns the index within this string of the last occurrence of the
specified substring. The integer returned is the largest value k
such that:
k <= Math.min(fromIndex, str.length()) &&
this.toString().startsWith(str, k)
If no such value of k exists, then -1 is returned.
Parameters:
str - the substring to search for.
Parameters:
fromIndex - the index to start the search from. the index within this sequence of the last occurrence of thespecified substring.
throws:
java.lang.NullPointerException - if str is null. |
| length | | public int length()(Code) | | Returns the length (character count).
the length of the sequence of characters currently represented by this object |
| offsetByCodePoints | | public int offsetByCodePoints(int index, int codePointOffset)(Code) | | Returns the index within this sequence that is offset from the
given index by codePointOffset code
points. Unpaired surrogates within the text range given by
index and codePointOffset count as
one code point each.
Parameters:
index - the index to be offset
Parameters:
codePointOffset - the offset in code points the index within this sequence
exception:
IndexOutOfBoundsException - if indexis negative or larger then the length of this sequence,or if codePointOffset is positive and the subsequencestarting with index has fewer thancodePointOffset code points,or if codePointOffset is negative and the subsequencebefore index has fewer than the absolute value ofcodePointOffset code points. |
| replace | | public AbstractStringBuilder replace(int start, int end, String str)(Code) | | Replaces the characters in a substring of this sequence
with characters in the specified String. The substring
begins at the specified start and extends to the character
at index end - 1 or to the end of the
sequence if no such character exists. First the
characters in the substring are removed and then the specified
String is inserted at start. (This
sequence will be lengthened to accommodate the
specified String if necessary.)
Parameters:
start - The beginning index, inclusive.
Parameters:
end - The ending index, exclusive.
Parameters:
str - String that will replace previous contents. This object.
throws:
StringIndexOutOfBoundsException - if startis negative, greater than length(), orgreater than end. |
| reverse | | public AbstractStringBuilder reverse()(Code) | | Causes this character sequence to be replaced by the reverse of
the sequence. If there are any surrogate pairs included in the
sequence, these are treated as single characters for the
reverse operation. Thus, the order of the high-low surrogates
is never reversed.
Let n be the character length of this character sequence
(not the length in char values) just prior to
execution of the reverse method. Then the
character at index k in the new character sequence is
equal to the character at index n-k-1 in the old
character sequence.
Note that the reverse operation may result in producing
surrogate pairs that were unpaired low-surrogates and
high-surrogates before the operation. For example, reversing
"\uDC00\uD800" produces "\uD800\uDC00" which is
a valid surrogate pair.
a reference to this object. |
| setCharAt | | public void setCharAt(int index, char ch)(Code) | | The character at the specified index is set to ch. This
sequence is altered to represent a new character sequence that is
identical to the old character sequence, except that it contains the
character ch at position index.
The index argument must be greater than or equal to
0, and less than the length of this sequence.
Parameters:
index - the index of the character to modify.
Parameters:
ch - the new character.
throws:
IndexOutOfBoundsException - if index is negative or greater than or equal to length(). |
| setLength | | public void setLength(int newLength)(Code) | | Sets the length of the character sequence.
The sequence is changed to a new character sequence
whose length is specified by the argument. For every nonnegative
index k less than newLength, the character at
index k in the new character sequence is the same as the
character at index k in the old sequence if k is less
than the length of the old character sequence; otherwise, it is the
null character '\u0000'.
In other words, if the newLength argument is less than
the current length, the length is changed to the specified length.
If the newLength argument is greater than or equal
to the current length, sufficient null characters
('\u0000') are appended so that
length becomes the newLength argument.
The newLength argument must be greater than or equal
to 0.
Parameters:
newLength - the new length
throws:
IndexOutOfBoundsException - if thenewLength argument is negative. |
| subSequence | | public CharSequence subSequence(int start, int end)(Code) | | Returns a new character sequence that is a subsequence of this sequence.
An invocation of this method of the form
sb.subSequence(begin, end)
behaves in exactly the same way as the invocation
sb.substring(begin, end)
This method is provided so that this class can
implement the
CharSequence interface.
Parameters:
start - the start index, inclusive.
Parameters:
end - the end index, exclusive. the specified subsequence.
throws:
IndexOutOfBoundsException - if start or end are negative,if end is greater than length(),or if start is greater than end |
| substring | | public String substring(int start)(Code) | | Returns a new String that contains a subsequence of
characters currently contained in this character sequence. The
substring begins at the specified index and extends to the end of
this sequence.
Parameters:
start - The beginning index, inclusive. The new string.
throws:
StringIndexOutOfBoundsException - if start isless than zero, or greater than the length of this object. |
| substring | | public String substring(int start, int end)(Code) | | Returns a new String that contains a subsequence of
characters currently contained in this sequence. The
substring begins at the specified start and
extends to the character at index end - 1.
Parameters:
start - The beginning index, inclusive.
Parameters:
end - The ending index, exclusive. The new string.
throws:
StringIndexOutOfBoundsException - if startor end are negative or greater thanlength(), or start isgreater than end. |
| toString | | abstract public String toString()(Code) | | Returns a string representing the data in this sequence.
A new String object is allocated and initialized to
contain the character sequence currently represented by this
object. This String is then returned. Subsequent
changes to this sequence do not affect the contents of the
String.
a string representation of this sequence of characters. |
| trimToSize | | public void trimToSize()(Code) | | Attempts to reduce storage used for the character sequence.
If the buffer is larger than necessary to hold its current sequence of
characters, then it may be resized to become more space efficient.
Calling this method may, but is not required to, affect the value
returned by a subsequent call to the
AbstractStringBuilder.capacity() method.
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