Java StringBuffer.length方法代碼示例

import java.lang.StringBuffer; //導入方法依賴的package包/類
public static String dumpProperties(Properties p)
{
    if ( p == null ) return "Null Properties";
    StringBuffer sb = new StringBuffer();

    TreeMap sm = new TreeMap(p);
    Set keySet = sm.keySet();
    Iterator iter = keySet.iterator();
    while (iter.hasNext()) {
        String key = (String)iter.next();
        String value = (String)sm.get(key);
        if ( key.indexOf("secret") >= 0 ) value = "** suppressed ("+value.length()+") **";
        if ( sb.length() > 0 ) sb.append("\n");
        sb.append(key);
        sb.append(": ");
        sb.append(value);
    }
    if ( sb.length() < 1 ) sb.append("Empty Properties");
    return sb.toString();
}
 

import java.lang.StringBuffer; //導入方法依賴的package包/類
public String parseChars(String allText) {
  char cursor;
  int lastEm = -1;
  int lastStrong = -1;
  StringBuffer text = new StringBuffer(allText);

  for (int i = 0; i < text.length(); i++) {
    cursor = text.charAt(i);

    switch (cursor) {
    case '_':
      //checks if previous was whitespace
      // is there two? (strong)
      if (text.charAt(i + 1) == '_') {
        // is this the left one?
        if (lastStrong == -1) {
          if (i - 1 < 0 || Character.isWhitespace(text.charAt(i - 1))) {
            lastStrong = i;
            // increment to get past double "__"
            i++;
          }
        } else {
          // i is on the left "_" of the closing "__"
          if (i + 2 > text.length() || Character.isWhitespace(text.charAt(i + 2))) {

            text = replaceSurrounding("__", "strong", lastStrong, i, text);

            lastStrong = -1;
          }
        }
      }

    }
  }

  return text.toString();
}
 

import java.lang.StringBuffer; //導入方法依賴的package包/類
public String decode() {

    NodeTree tree = new NodeTree();

    int out_file_length = uncompressed_size();
    //String sb = "";
    // immutable Strings replaced with more efficient string handling, suggested by wlbaker: 
    StringBuffer sb = new StringBuffer(out_file_length);
    // System.out.println("About to enter decoding while loop...");
    while (source_index < source_buffer.length && sb.length() != out_file_length) {
      //System.out.println("Have entered decoding while loop...");
      Node node = tree.getRoot();
      //      System.out.println("About to enter leaf finding while loop...");
      while (!node.is_leaf()) {
        // find leaf node
        // System.out.println("now searching for leaf node...");
        if (read_next_bit() != 0) {
          //        if (read_next_bit(source_index, source_char, bit, source_buffer) != 0) {
          node = node.left;
          // System.out.println("Picking left node, source bit != 0.");
        } else {
          node = node.right;
          // System.out.println("Picking right node, source bit == 0.");
        }
      }
      // System.out.println("Node symbol: " + (char)(node.symbol));
      // System.out.println("Node symbol as toString: " + node);

      sb.append((char)node.symbol); // more efficient string building, thanks wlbaker
      //sb = sb + (char)(node.symbol);

      //      sb = sb + node;
      //      sb = sb + ((char)(node.symbol & 0xff));
      //      node.weight += 1;
      node.incrementWeight();
      // System.out.println("decoded text so far is: " +
      //                   sb + ", now to update tree...");
      tree.update_tree(node);
    }
    //source_buffer = null; // not needed for standalone utility
    //is_filled = false;
    return sb.toString();
  }
 

import java.lang.StringBuffer; //導入方法依賴的package包/類
/**
 * Copy the build template files into a service patch location and update
 * the properties with values from the current service patch.
 *
 * @param  confdir      Directory containing the config files
 * @param  destdir      Destination directory
 * @param  variables    Variables to be replaced in the files
 * @param  build        Base product build information
 */
private void writeBuildFiles(File confdir, File destdir, Map variables, CMnBuildData build) {
    // Use a stack to process the version number,
    // popping the end digit if no matching directory is found
    StringTokenizer vernumTokenizer = new StringTokenizer(CMnPatchUtil.getVersionNumber(build.getBuildVersion()), ".");
    Stack<String> vernumStack = new Stack<String>();
    while(vernumTokenizer.hasMoreTokens()) {
        vernumStack.push((String) vernumTokenizer.nextToken());
    }

    // Select the most appropriate template directory
    File templatedir = null;
    while(!vernumStack.empty() && (templatedir == null)) {
        StringBuffer dirname = new StringBuffer();
        Iterator stackIter = vernumStack.iterator();
        while(stackIter.hasNext()) {
            if (dirname.length() > 0) {
                dirname.append(".");
            }
            dirname.append((String) stackIter.next());
        }

        // Check to see if the most specific directory exists
        File currentdir = new File(confdir.getAbsolutePath() + File.separator + dirname);
        if (currentdir.isDirectory()) {
            templatedir = currentdir;
        } else {
            // Remove the least significant digit and make another pass
            vernumStack.pop();
        }
    }

    // Make sure the destination directory exists
    boolean destfound = false;
    if (!destdir.exists()) {
        destfound = destdir.mkdirs();
    } else {
        destfound = true;
    }
    // Copy the template files to the output directory
    if ((templatedir != null) && destfound) {
        destdir.mkdirs();
        File[] files = templatedir.listFiles();
        for (int idx = 0; idx < files.length; idx++) {
            String filename = files[idx].getName();
            File srcfile = files[idx];
            File destfile = new File(destdir.getAbsolutePath() + File.separator + filename);
            try {
                // Replace any variables in the file with build values
                display("Copying template file from " + srcfile + " to " + destfile);
                replaceVariables(srcfile, destfile, variables);
            } catch (FileNotFoundException nfex) {
                display("Unable to locate file: " + srcfile.getName());
            } catch (IOException ioex) {
                display("Unable to copy file: " + destfile.getName());
            }

            // Make sure any script files are executable
            if (filename.endsWith(".sh")) {
                try {
                    destfile.setExecutable(true);
                } catch (java.lang.SecurityException sex) {
                    display("Unable to make build script executable: " + destfile.getAbsolutePath());
                }
            }
        }
    } else {
        display("Unable to copy template files: src=" + templatedir + ", dest=" + destdir);
    }
}