Examples of java.lang.StringBuffer

java.lang.StringBuffer
A thread-safe, mutable sequence of characters. A string buffer is like a {@link String}, but can be modified. 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.
String buffers are safe for use by multiple threads. The methods are synchronized where necessary so that all the operations on any particular instance behave as if they occur in some serial order that is consistent with the order of the method calls made by each of the individual threads involved.
The principal operations on a StringBuffer are the append and insert methods, which are overloaded so as to accept data of any type. Each effectively converts a given datum to a string and then appends or inserts the characters of that string to the string buffer. The append method always adds these characters at the end of the buffer; the insert method adds the characters at a specified point.
For example, if z refers to a string buffer object whose current contents are "start", then the method call z.append("le") would cause the string buffer to contain "startle", whereas z.insert(4, "le") would alter the string buffer to contain "starlet".
In general, if sb refers to an instance of a StringBuffer, then sb.append(x) has the same effect as sb.insert(sb.length(), x).
Whenever an operation occurs involving a source sequence (such as appending or inserting from a source sequence) this class synchronizes only on the string buffer performing the operation, not on the source.
Every string buffer has a capacity. As long as the length of the character sequence contained in the string buffer does not exceed the capacity, it is not necessary to allocate a new internal buffer array. If the internal buffer overflows, it is automatically made larger. As of release JDK 5, this class has been supplemented with an equivalent class designed for use by a single thread, {@link StringBuilder}. The StringBuilder class should generally be used in preference to this one, as it supports all of the same operations but it is faster, as it performs no synchronization. @author Arthur van Hoff @version 1.101, 11/17/05 @see java.lang.StringBuilder @see java.lang.String @since JDK1.0

            while (!self.getQuorumVerifier().containsQuorum(newLeaderProposal.ackSet)){
            //while (newLeaderProposal.ackCount <= self.quorumPeers.size() / 2) {
                if (self.tick > self.initLimit) {
                    // Followers aren't syncing fast enough,
                    // renounce leadership!
                    StringBuffer ackToString = new StringBuffer();
                    for(Long id : newLeaderProposal.ackSet)
                        ackToString.append(id + ": ");
                    
                    shutdown("Waiting for a quorum of followers, only synced with: " + ackToString);
                    HashSet<Long> followerSet = new HashSet<Long>();
                    for(FollowerHandler f : followers)
                        followerSet.add(f.getSid());

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     * to <code>DISCONNECTED_STATE</code>.
     ***/
    public POP3()
    {
        setDefaultPort(DEFAULT_PORT);
        __commandBuffer = new StringBuffer();
        __popState = DISCONNECTED_STATE;
        _reader = null;
        __writer = null;
        _replyLines = new Vector();
        _commandSupport_ = new ProtocolCommandSupport(this);

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      // (see HTTP specification section 3.4.1)
      logger.info("changing to default encoding");
      request.setCharacterEncoding( encoding );
    }


    StringBuffer correction = new StringBuffer();
  
    String query = request.getParameter("query");
    String lang = request.getParameter("l");


    if (lang == null) {
      lang = "pt_PT";
    } else if ( lang.equals("en") ) {
      lang = "en_US";
    } else {
      lang = "pt_PT";
    }


    if (query != null && lang != null) {
      Matcher matcher = pattern.matcher( query );


      logger.info("checking query: "+ query);


      while ( matcher.find() ) {
        String[] allSuggestions = null;


        String match = matcher.group(1).toLowerCase();
        logger.info("match: "+ match);


        if ( !isOperator( match ) ) {
          try {
            allSuggestions = SpellChecker.suggestSimilarHunspell(match, lang, 1, reader, FIELD, minFreq, timesFreq, dictPath);
    
            if ( allSuggestions.length > 0 ) {
              // only add word to suggestion if it is different
              if ( !match.equals( allSuggestions[0] ) ) {
                logger.info("suggestion: "+ allSuggestions[0]);
                matcher.appendReplacement( correction, "<em>"+ allSuggestions[0] +"</em>");
              }
            }         
          } catch (InterruptedException e) {      
            throw new IOException(e);
          }
        }
      }
      matcher.appendTail(correction);
    }
    
    response.setContentType("text/html; charset=UTF-8");
    response.setCharacterEncoding("UTF-8");
    
    PrintWriter out=response.getWriter();
      out.println("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">");
      out.println("<html>");
        out.println("<head>");
          out.println("<title>Query Spellchecker</title>");
        out.println("</head>");
        out.println("<body>");
          out.println("<h3>Query Spellchecker</h3>");
          out.println("<h5>Query:</h5>");
            out.println("<div id=\"query\">");      
            out.println( query );
          out.println("</div>");
          out.println("<h5>Correction:</h5>");
          out.println("<div id=\"correction\">");      
            out.println( correction.toString() );
          out.println("</div>");
        out.println("</body>");
      out.println("</html>");    
      out.close();
  }

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     * @author Steve Jin <sjin@vmware.com>
     */
  private String readOvfContent(String ovfFilePath)
        throws IOException 
  {
    StringBuffer strContent = new StringBuffer();
    BufferedReader in = new BufferedReader
            (new InputStreamReader(new FileInputStream(ovfFilePath)));
    String lineStr;
    while ((lineStr = in.readLine()) != null) {
      strContent.append(lineStr);
    }
    in.close();
    return strContent.toString();
  }

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   * Extract title from plain text (first paragrapth until the maximum of tokens with LIMIT_TOKENS length)
   * @param text text
   * @return title from @text
   */
  private String getTitle(String text) {    
    StringBuffer buf=new StringBuffer();
    BufferedReader reader=new BufferedReader(new StringReader(text));
    int i=0;
    boolean hasText=false;
    boolean stop=false;
    int ntokens=0;
    String saux=null;
    String tokens[]=null;
    
    try {
      while (!stop && (saux=reader.readLine())!=null) {
        saux=saux.trim();      
           
        if (saux.equals("")) {
          if (hasText) {
            stop=true;
          }
        }
        else {
          hasText=true;
          
          tokens=saux.split("[^a-zA-Z_0-9����������������������������������]"); // a non-word character
          for (int j=0; ntokens<LIMIT_TOKENS && j<tokens.length; j++) {
            if (!tokens[j].equals("")) {
              if (ntokens!=0) {
                buf.append(' ');
              }  
              buf.append(tokens[j]);
              ntokens++;              
            }
          }
          if (ntokens==LIMIT_TOKENS) {
            stop=true;
          }        
        }
            
        i++;
      }
    }
    catch (IOException e) {
      e.printStackTrace();
      return "";
    }
    
    return buf.toString();
  }

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        }
        return (List) hostList.clone();
    }


    public String toString() {
        StringBuffer buf = new StringBuffer();


        buf.append("FileName=" + propertyPath);
        buf.append(", ");
        buf.append(SignOnConstants.CERT_TERM_VALIDITY);
        buf.append("=");
        buf.append(getCertTermOfValidity());
        buf.append(", ");
        buf.append(SignOnConstants.LEGACY_PROXY);
        buf.append("=");
        buf.append(isLegacyProxy());
        buf.append(", ");
        buf.append(SignOnConstants.OPEN_BROWSER);
        buf.append("=");
        buf.append(isOpenBrowser());
        buf.append(SignOnConstants.HOST_LIST);
        buf.append("=");
        if (hostList != null) {
            buf.append(hostList.toString());
        }
        return buf.toString();
    }

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     * Log a particular message
     *
     * @param mail the mail to process
     */
    public void service(Mail mail) {
        log(new StringBuffer(160).append("Logging mail ").append(mail.getName()).toString());
        if (comment != null) log(comment);
        try {
            if (headers) log(getMessageHeaders(mail.getMessage()));
            if (body) {
                int len = bodyMax > 0 ? bodyMax : mail.getMessage().getSize();

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            int nColumnCount = mxTable.getAccessibleColumnCount();
            maRowCountLabel.setText (Integer.toString (nRowCount));
            maColumnCountLabel.setText (Integer.toString (nColumnCount));
            maCellCountLabel.setText (Integer.toString (nRowCount*nColumnCount));


            StringBuffer sList = new StringBuffer();
            int[] aSelected = mxTable.getSelectedAccessibleRows();
            boolean bFirst = true;
            for (int i=0; i<aSelected.length; i++)
            {
                if ( ! bFirst)
                {
                    sList.append (", ");
                    bFirst = false;
                }
                sList.append (Integer.toString(aSelected[i]));
            }
            maSelectedRowsLabel.setText (sList.toString());
            sList = new StringBuffer();
            aSelected = mxTable.getSelectedAccessibleColumns();
            bFirst = true;
            for (int i=0; i<aSelected.length; i++)
            {
                if ( ! bFirst)
                {
                    sList.append (", ");
                    bFirst = false;
                }
                sList.append (Integer.toString(aSelected[i]));
            }
            maSelectedColumnsLabel.setText (sList.toString());
        }
    }

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  /**
   * Print out some information about this HDU.
   */
  public String toString() {
    StringBuffer sb = new StringBuffer();
    if (isHeader(myHeader)) {
      sb.append("  Image\n");
    } else {
      sb.append("  Image (bad header)\n");
    }


    sb.append("      Header Information:\n");
    sb.append("         BITPIX=" + myHeader.getIntValue("BITPIX", -1)
        + "\n");
    int naxis = myHeader.getIntValue(Header.NAXIS, -1);
    sb.append("         NAXIS=" + naxis + "\n");
    for (int i = 1; i <= naxis; i += 1) {
      sb.append("         NAXIS" + i + "="
          + myHeader.getIntValue(Header.NAXIS + i, -1) + "\n");
    }


    sb.append("      Data information:\n");
    try {
      if (myData.getData() == null) {
        sb.append("        No Data\n");
      } else {
        sb.append("         "
            + ArrayFuncs.arrayDescription(myData.getData()) + "\n");
      }
    } catch (Exception e) {
      sb.append("      Unable to get data\n");
    }
    return sb.toString();
  }

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     * 
     * @return a String containing the serialisation of this XPointer
     */
    public String toString() {
        if (shorthandPointer.equals(emptyNCName)) {
            StringBuffer buffer = new StringBuffer();
            Iterator parts = pointerParts.iterator();
            while (parts.hasNext()) {
                buffer.append(parts.next());
            }
            return buffer.toString();
        } else {
            return shorthandPointer.toString();
        }
    }

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