stringbuffer.html

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 index <code>start</code>, are appended, in order, to the contents of
 this sequence up to the (exclusive) index <code>end</code>. The length
 of this sequence is increased by the value of <code>end - start</code>.
 <p>
 Let <i>n</i> be the length of this character sequence just prior to
 execution of the <code>append</code> method. Then the character at
 index <i>k</i> in this character sequence becomes equal to the
 character at index <i>k</i> in this sequence, if <i>k</i> is less than
 <i>n</i>; otherwise, it is equal to the character at index 
 <i>k+start-n</i> in the argument <code>s</code>.
 <p>
 If <code>s</code> is <code>null</code>, then this method appends
 characters as if the s parameter was a sequence containing the four
 characters <code>"null"</code>.
<P>
<DD><DL>
<DT><B>指定者：</B><DD>接口 <CODE><A HREF="Appendable.html" title="java.lang 中的接口">Appendable</A></CODE> 中的 <CODE><A HREF="Appendable.html#append(java.lang.CharSequence, int, int)">append</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>参数：</B><DD><CODE>s</CODE> - the sequence to append.<DD><CODE>start</CODE> - the starting index of the subsequence to be appended.<DD><CODE>end</CODE> - the end index of the subsequence to be appended.
<DT><B>返回：</B><DD>a reference to this object.
<DT><B>抛出：</B>
<DD><CODE><A HREF="IndexOutOfBoundsException.html" title="java.lang 中的类">IndexOutOfBoundsException</A></CODE> - if
                  <code>start</code> or <code>end</code> are negative, or
             <code>start</code> is greater than <code>end</code> or
             <code>end</code> is greater than <code>s.length()</code><DT><B>从以下版本开始：</B></DT>
  <DD>1.5</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="append(char[])"><!-- --></A><H3>
append</H3>
<PRE>
public <A HREF="StringBuffer.html" title="java.lang 中的类">StringBuffer</A> <B>append</B>(char[]&nbsp;str)</PRE>
<DL>
<DD>Appends the string representation of the <code>char</code> array 
 argument to this sequence. 
 <p>
 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. 
 <p>
 The overall effect is exactly as if the argument were converted to 
 a string by the method <A HREF="String.html#valueOf(char[])"><CODE>String.valueOf(char[])</CODE></A> and the 
 characters of that string were then <A HREF="StringBuffer.html#append(java.lang.String)"><CODE>appended</CODE></A> 
 to this character sequence.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>参数：</B><DD><CODE>str</CODE> - the characters to be appended.
<DT><B>返回：</B><DD>a reference to this object.</DL>
</DD>
</DL>
<HR>

<A NAME="append(char[], int, int)"><!-- --></A><H3>
append</H3>
<PRE>
public <A HREF="StringBuffer.html" title="java.lang 中的类">StringBuffer</A> <B>append</B>(char[]&nbsp;str,
                           int&nbsp;offset,
                           int&nbsp;len)</PRE>
<DL>
<DD>Appends the string representation of a subarray of the
 <code>char</code> array argument to this sequence.
 <p>
 Characters of the <code>char</code> array <code>str</code>, starting at
 index <code>offset</code>, are appended, in order, to the contents
 of this sequence. The length of this sequence increases
 by the value of <code>len</code>.
 <p>
 The overall effect is exactly as if the arguments were converted to
 a string by the method <A HREF="String.html#valueOf(char[], int, int)"><CODE>String.valueOf(char[],int,int)</CODE></A> and the
 characters of that string were then <A HREF="StringBuffer.html#append(java.lang.String)"><CODE>appended</CODE></A>
 to this character sequence.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>参数：</B><DD><CODE>str</CODE> - the characters to be appended.<DD><CODE>offset</CODE> - the index of the first <code>char</code> to append.<DD><CODE>len</CODE> - the number of <code>char</code>s to append.
<DT><B>返回：</B><DD>a reference to this object.</DL>
</DD>
</DL>
<HR>

<A NAME="append(boolean)"><!-- --></A><H3>
append</H3>
<PRE>
public <A HREF="StringBuffer.html" title="java.lang 中的类">StringBuffer</A> <B>append</B>(boolean&nbsp;b)</PRE>
<DL>
<DD>Appends the string representation of the <code>boolean</code> 
 argument to the sequence.
 <p>
 The argument is converted to a string as if by the method 
 <code>String.valueOf</code>, and the characters of that 
 string are then appended to this sequence.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>参数：</B><DD><CODE>b</CODE> - a <code>boolean</code>.
<DT><B>返回：</B><DD>a reference to this object.<DT><B>另请参见：</B><DD><A HREF="String.html#valueOf(boolean)"><CODE>String.valueOf(boolean)</CODE></A>, 
<A HREF="StringBuffer.html#append(java.lang.String)"><CODE>append(java.lang.String)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="append(char)"><!-- --></A><H3>
append</H3>
<PRE>
public <A HREF="StringBuffer.html" title="java.lang 中的类">StringBuffer</A> <B>append</B>(char&nbsp;c)</PRE>
<DL>
<DD>Appends the string representation of the <code>char</code> 
 argument to this sequence. 
 <p>
 The argument is appended to the contents of this sequence. 
 The length of this sequence increases by <code>1</code>. 
 <p>
 The overall effect is exactly as if the argument were converted to 
 a string by the method <A HREF="String.html#valueOf(char)"><CODE>String.valueOf(char)</CODE></A> and the character 
 in that string were then <A HREF="StringBuffer.html#append(java.lang.String)"><CODE>appended</CODE></A> to this 
 character sequence.
<P>
<DD><DL>
<DT><B>指定者：</B><DD>接口 <CODE><A HREF="Appendable.html" title="java.lang 中的接口">Appendable</A></CODE> 中的 <CODE><A HREF="Appendable.html#append(char)">append</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>参数：</B><DD><CODE>c</CODE> - a <code>char</code>.
<DT><B>返回：</B><DD>a reference to this object.</DL>
</DD>
</DL>
<HR>

<A NAME="append(int)"><!-- --></A><H3>
append</H3>
<PRE>
public <A HREF="StringBuffer.html" title="java.lang 中的类">StringBuffer</A> <B>append</B>(int&nbsp;i)</PRE>
<DL>
<DD>Appends the string representation of the <code>int</code> 
 argument to this sequence. 
 <p>
 The argument is converted to a string as if by the method 
 <code>String.valueOf</code>, and the characters of that 
 string are then appended to this sequence.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>参数：</B><DD><CODE>i</CODE> - an <code>int</code>.
<DT><B>返回：</B><DD>a reference to this object.<DT><B>另请参见：</B><DD><A HREF="String.html#valueOf(int)"><CODE>String.valueOf(int)</CODE></A>, 
<A HREF="StringBuffer.html#append(java.lang.String)"><CODE>append(java.lang.String)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="appendCodePoint(int)"><!-- --></A><H3>
appendCodePoint</H3>
<PRE>
public <A HREF="StringBuffer.html" title="java.lang 中的类">StringBuffer</A> <B>appendCodePoint</B>(int&nbsp;codePoint)</PRE>
<DL>
<DD>Appends the string representation of the <code>codePoint</code>
 argument to this sequence.

 <p> The argument is appended to the contents of this sequence.
 The length of this sequence increases by
 <A HREF="Character.html#charCount(int)"><CODE>Character.charCount(codePoint)</CODE></A>.

 <p> The overall effect is exactly as if the argument were
 converted to a <code>char</code> array by the method <A HREF="Character.html#toChars(int)"><CODE>Character.toChars(int)</CODE></A> and the character in that array were
 then <A HREF="StringBuffer.html#append(char[])"><CODE>appended</CODE></A> to this character
 sequence.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>参数：</B><DD><CODE>codePoint</CODE> - a Unicode code point
<DT><B>返回：</B><DD>a reference to this object.<DT><B>从以下版本开始：</B></DT>
  <DD>1.5</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="append(long)"><!-- --></A><H3>
append</H3>
<PRE>
public <A HREF="StringBuffer.html" title="java.lang 中的类">StringBuffer</A> <B>append</B>(long&nbsp;lng)</PRE>
<DL>
<DD>Appends the string representation of the <code>long</code> 
 argument to this sequence.
 <p>
 The argument is converted to a string as if by the method 
 <code>String.valueOf</code>, and the characters of that 
 string are then appended to this sequence.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>参数：</B><DD><CODE>lng</CODE> - a <code>long</code>.
<DT><B>返回：</B><DD>a reference to this object.<DT><B>另请参见：</B><DD><A HREF="String.html#valueOf(long)"><CODE>String.valueOf(long)</CODE></A>, 
<A HREF="StringBuffer.html#append(java.lang.String)"><CODE>append(java.lang.String)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="append(float)"><!-- --></A><H3>
append</H3>
<PRE>
public <A HREF="StringBuffer.html" title="java.lang 中的类">StringBuffer</A> <B>append</B>(float&nbsp;f)</PRE>
<DL>
<DD>Appends the string representation of the <code>float</code> 
 argument to this sequence.
 <p>
 The argument is converted to a string as if by the method 
 <code>String.valueOf</code>, and the characters of that 
 string are then appended to this string sequence.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>参数：</B><DD><CODE>f</CODE> - a <code>float</code>.
<DT><B>返回：</B><DD>a reference to this object.<DT><B>另请参见：</B><DD><A HREF="String.html#valueOf(float)"><CODE>String.valueOf(float)</CODE></A>, 
<A HREF="StringBuffer.html#append(java.lang.String)"><CODE>append(java.lang.String)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="append(double)"><!-- --></A><H3>
append</H3>
<PRE>
public <A HREF="StringBuffer.html" title="java.lang 中的类">StringBuffer</A> <B>append</B>(double&nbsp;d)</PRE>
<DL>
<DD>Appends the string representation of the <code>double</code> 
 argument to this sequence.
 <p>
 The argument is converted to a string as if by the method 
 <code>String.valueOf</code>, and the characters of that 
 string are then appended to this sequence.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>参数：</B><DD><CODE>d</CODE> - a <code>double</code>.
<DT><B>返回：</B><DD>a reference to this object.<DT><B>另请参见：</B><DD><A HREF="String.html#valueOf(double)"><CODE>String.valueOf(double)</CODE></A>, 
<A HREF="StringBuffer.html#append(java.lang.String)"><CODE>append(java.lang.String)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="delete(int, int)"><!-- --></A><H3>
delete</H3>
<PRE>
public <A HREF="StringBuffer.html" title="java.lang 中的类">StringBuffer</A> <B>delete</B>(int&nbsp;start,
                           int&nbsp;end)</PRE>
<DL>
<DD>Removes the characters in a substring of this sequence.
 The substring begins at the specified <code>start</code> and extends to
 the character at index <code>end - 1</code> or to the end of the
 sequence if no such character exists. If
 <code>start</code> is equal to <code>end</code>, no changes are made.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>参数：</B><DD><CODE>start</CODE> - The beginning index, inclusive.<DD><CODE>end</CODE> - The ending index, exclusive.
<DT><B>返回：</B><DD>This object.
<DT><B>抛出：</B>
<DD><CODE><A HREF="StringIndexOutOfBoundsException.html" title="java.lang 中的类">StringIndexOutOfBoundsException</A></CODE> - if <code>start</code>
             is negative, greater than <code>length()</code>, or
                   greater than <code>end</code>.<DT><B>从以下版本开始：</B></DT>
  <DD>1.2</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="deleteCharAt(int)"><!-- --></A><H3>
deleteCharAt</H3>
<PRE>
public <A HREF="StringBuffer.html" title="java.lang 中的类">StringBuffer</A> <B>deleteCharAt</B>(int&nbsp;index)</PRE>
<DL>
<DD>Removes the <code>char</code> at the specified position in this
 sequence. This sequence is shortened by one <code>char