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


    int iRnd;
    long lSeed = new Date().getTime();
    Random oRnd = new Random(lSeed);
    String sHex;
    StringBuffer sUUID = new StringBuffer(32);
    byte[] localIPAddr = new byte[4];


    try {


      // 8 characters Code IP address of this machine
      localIPAddr = InetAddress.getLocalHost().getAddress();


      sUUID.append(byteToStr[((int) localIPAddr[0]) & 255]);
      sUUID.append(byteToStr[((int) localIPAddr[1]) & 255]);
      sUUID.append(byteToStr[((int) localIPAddr[2]) & 255]);
      sUUID.append(byteToStr[((int) localIPAddr[3]) & 255]);
    }
    catch (UnknownHostException e) {
      // Use localhost by default
      sUUID.append("7F000000");
    }


    // Append a seed value based on current system date
    sUUID.append(Long.toHexString(lSeed));


    // 6 characters - an incremental sequence
    sUUID.append(Integer.toHexString(iSequence++));


    if (iSequence>16777000) iSequence=1048576;


    do {
      iRnd = oRnd.nextInt();
      if (iRnd>0) iRnd = -iRnd;
      sHex = Integer.toHexString(iRnd);
    } while (0==iRnd);


    // Finally append a random number
    sUUID.append(sHex);


    return sUUID.substring(0, 32);
  } // generateUUID()

View Full Code Here

    
  if (byCategory!=Character.UNASSIGNED && byCategory!=Character.UPPERCASE_LETTER && byCategory!=Character.LOWERCASE_LETTER)
    throw new IllegalArgumentException("Gadgets.generateRandomId() Character category must be one of {UNASSIGNED, UPPERCASE_LETTER, LOWERCASE_LETTER}");


  int iCsLen = sCharset.length();
    StringBuffer oId = new StringBuffer(iLength);
    Random oRnd = new Random(new Date().getTime());
    for (int i=0; i<iLength; i++){
    char c = sCharset.charAt(oRnd.nextInt(iCsLen));
    if (byCategory==Character.UPPERCASE_LETTER)
      c = Character.toUpperCase(c);
    else if (byCategory==Character.LOWERCASE_LETTER)
      c = Character.toLowerCase(c);
    oId.append(c);
  } // next
  return oId.toString();
  } // generateRandomId

View Full Code Here

   * @return String
   */
  public static String XHTMLEncode(String text) {
    char c;
    int len = text.length();
    StringBuffer results = new StringBuffer(len*2);


    for (int i = 0; i < len; ++i) {
      c = text.charAt(i);
      if (c<=127) {
    results.append(c);
      } else {
        results.append("&#"+String.valueOf((int)c)+";");
      }
    }
    return results.toString();
  }

View Full Code Here

        super(h);
        m_ilen = ilen;
        m_ibuf = ByteBuffer.allocate(ilen);
        m_olen = olen;
        m_obuf = ByteBuffer.allocate(olen);
        m_line = new StringBuffer(4096);
    } // TcpSocket

View Full Code Here

            "");
    String html = "&auml; &Auml; &ouml; &Ouml; &lt; &amp; &gt; " +
      "&apos; &nbsp; &quot;";
    appendEntityAlphaTest("Test with one entity.", html,
            "");
    StringBuffer sbControl = new StringBuffer();
    for (int ic = 0x80; ic <= 0x9f; ic++) {
      sbControl.append((char)ic);
    }
    super.append("control(0)=\n" + sbControl.charAt(0) + "," + Integer.toHexString(sbControl.charAt(0)));
    String control = sbControl.toString();
    char[] cc = new char[sbControl.length()];
    sbControl.getChars(0, cc.length, cc, 0);
    String control2 = new String(cc);
    super.append("control(0)=\n" + control.charAt(0) + "," + Integer.toHexString(control.charAt(0)));
    super.append("control2(0)=\n" + control2.charAt(0) + "," + Integer.toHexString(control2.charAt(0)));
    String cvControl = control;
    try {
      cvControl = new String(control.getBytes("ISO-8859_1"), "Cp1252");
    } catch (UnsupportedEncodingException e) {
      super.append("Conversion error for win contol string.");
    }
    super.append("cvControl(0)=\n" + cvControl.charAt(0) + "," + Integer.toHexString(cvControl.charAt(0)));
    String ncontrol = EncodingUtil.replaceSpChars(cvControl, true, false,
        false, false);
    super.append("converted cvControl,ncontrol=\n" + ncontrol.charAt(0) + "," + Integer.toHexString(ncontrol.charAt(0)));
    StringBuffer sbTst = new StringBuffer();
    StringBuffer sbRes = new StringBuffer();
    appendHashTest("Iso entities", EncodingUtil.getConvIso88591(), sbTst, sbRes);
    // Convert from ISO to iso
    String cvRes = EncodingUtil.replaceSpChars(sbRes.toString(),
        false, false, false, false);
    StringBuffer sbwTst = new StringBuffer();
    StringBuffer sbwRes = new StringBuffer();
    appendHashTest("cp1252 entities", EncodingUtil.getConvCp1252(), sbwTst, sbwRes);
    // Convert from windows to windows
    String cvwRes = EncodingUtil.replaceSpChars(sbwRes.toString(),
        true, false, true, false);
    appendEntitySpTest("Test with iso conv to iso midp phone.",
        sbRes.toString(), false, false, false, cvRes);
    // Convert from windows to windows .  Given that windows uses
    // ISO control characters, it should not match the other encoding.
    appendEntitySpTest("Test with win conv to iso midp phone.",
        sbwRes.toString(), true, false, false, cvRes);
    appendEntitySpTest("Test with win conv to win midp phone.",
        sbwRes.toString(), true, true, false, cvwRes);
    // Convert from ISO to windows.  Given that windows supports
    // the ISO characters, it should match other decoding too.
    appendEntitySpTest("Test with iso conv to windows midp phone.",
        sbRes.toString(), false, true, false, cvwRes);
    appendEntitySpTest("Test with iso sponly conv to iso midp phone.",
        control, false, false, false, control);
    // Convert from windows to windows .  Given that windows uses
    // ISO control characters, it should not match the other encoding.
    appendEntitySpTest("Test with win sponly conv to iso midp phone.",
        control, true, false, false, control);
    appendEntitySpTest("Test with win sponly conv to win midp phone.",
        control, true, true, false, control);
    // Convert from ISO to windows.  Given that windows supports
    // the ISO characters, it should match other decoding too.
    appendEntitySpTest("Test with iso sponly conv to windows midp phone.",
        control, false, true, false, control);
    String[] isoSp = EncodingUtil.getIsoSpecialEntities();
    char[] isoSpVals =
      {'-', // en dash 
      '-', // em dash 
      '\'', // left single quotation mark 
      '\'', // right single quotation mark 
      '\'', // single low-9 quotation mark 
      '\"', // left double quotation mark 
      '\"', // right double quotation mark 
      '\"'}; // double low-9 quotation mark 
    Hashtable isoConv = new Hashtable();
    EncodingUtil.initEntVals(isoConv, isoSp, isoSpVals);
    StringBuffer sbSp = new StringBuffer();
    StringBuffer sbSpRes = new StringBuffer();
    appendHashTest("Iso special entities", isoConv, sbSp, sbSpRes);
  }

View Full Code Here

          String date=st.nextToken().trim();
          st.nextToken();
          String state=st.nextToken().trim();
    setBackground((Color) ht_string2color.get(state));
    StringTokenizer st2 = new StringTokenizer(((DefaultMutableTreeNode)dmtn.getFirstChild()).toString()," | ");
    StringBuffer ttt=new StringBuffer(
      "<html><B>IP = </B>"+/*IP=<ip> Profil=<port>/<profil>*/dmtn.getParent().getParent()+"<B> Profil =</B>"+dmtn.getParent()+
      "<br><B>Bundle : </B>"+/*Bundle : Id=<bundleId> : <bundleSymbolicName>*/dmtn+
      "<br><B>Date : </B>"+/*<date> - <time>*/st2.nextToken()+" - "+st2.nextToken()+
      "<br><B>State on last log : "+/*<bundleState>*/st2.nextToken()+
        "<br>Event "+/*Event <eventNumber> : <logLevel> : <message>*/dmtn.getChildCount()+" : "+st2.nextToken()+" : </B><br>");
    while (st2.hasMoreTokens()) {
      ttt.append(st2.nextToken()+" ");
    }
    setToolTipText(ttt+"</html>");
  } 
        break;
      }

View Full Code Here

    else
      return false;
  }
  
  public String getSelectedAsString() {
    StringBuffer buffer = new StringBuffer();
    for(Iterator<String> iter = selected.iterator();iter.hasNext();) {
      buffer.append(iter.next());
      
      if(iter.hasNext())
        buffer.append(",");
    }
    
    return buffer.toString();
  }

View Full Code Here


    protected String leftMiddleRight(String left, 
                                     String middle,
                                     String right)
    {
        StringBuffer sb = new StringBuffer(left.length()
                                           +right.length()
                                           +middle.length());
        leftMiddleRight(sb, left, middle, right);
        return sb.toString();
    }

View Full Code Here

        //list and converting each item to a string and summing
        //their lengths, but would that would be any less
        //expensive than letting the StringBuffer resize itself?
        int size = left.length() + right.length() + 
                   ((connector.length() + 7) * list.size());
        StringBuffer sb = new StringBuffer(size);
        leftRightListConnector(sb, left, right, list, connector);
        return sb.toString();
    }

View Full Code Here

     * @param rawText The <i>unquoted</i>, <i>unescaped</i> text to process.
     * @return Quoted and escaped text.
     */
    public String quoteAndEscapeText(String rawText)
    {
        StringBuffer buf = new StringBuffer( (int)(rawText.length() * 1.1) );


        char[] data = rawText.toCharArray();
        buf.append(SINGLE_QUOTE);
        for (int i = 0; i < data.length; i++)
        {
            switch (data[i])
            {
            case SINGLE_QUOTE:
                buf.append(SINGLE_QUOTE).append(SINGLE_QUOTE);
                break;
            // Some databases need to have backslashes escaped.
            // Subclasses can override this method to include
            // this case if appropriate.
            /*
                case BACKSLASH:
                buf.append(BACKSLASH).append(BACKSLASH);
                break;
            */
            default:
                buf.append(data[i]);
            }
        }
        buf.append(SINGLE_QUOTE);


        return buf.toString();
    }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of java.lang.StringBuffer

cn.edu.ynu.sei.liva.ui.LivaPlayerGUI

com.aetrion.flickr.photosets.Photoset

com.caringo.client.ScspAuthorization

com.cybozu.vmbkp.soap.GlobalManager

com.exedosoft.plat.sql.Lexer

com.exedosoft.plat.sql.QueryExpression

com.knowgate.dataxslt.PageSet

com.knowgate.hipergate.QueryByForm

com.knowgate.misc.Gadgets

com.livingsocial.hive.udtf.BinCase$BinCaseSelector

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.