Clean Code 代码整洁之道 格式

public class CodeAnalyzer implements JavaFileAnalysis {
  private int lineCount;
  private int maxLineWidth;
  private LineWidthHistogram lineWidthHistogram;
  private int totalChars;
  
  public CodeAnalyzer() {
    lineWidthHistogram = new LineWidthHistogram();
  }
  
  public static List<File> findJavaFiles(File parentDirectory) {
    List<File> files = new ArrayList<File>();
    findJavaFiles(parentDirectory, files);
    return files;
  }
  
  private static void findJavaFiles(File parentDirectory, List<File> files) {
    for(File file : parentDirectory.listFiles()) {
      if(file.getName().endsWith(".java"))
        files.add(file);
      else if(file.isDirectory())
        findJavaFiles(file, files);
    }
  }
  
  public void analyzeFile(File javaFile) throws Exception {
    BufferedReader br = new BufferedReader(new FileReader(javaFile));
    String line;
    while((line = br.readLine()) != null)
      measureLine(line);
  }
  
  private void measureLine(String line) {
    lineCount++;
    int lineSize = line.length();
    totalChars += lineSize;
    lineWidthHistogram.addLine(lineSize, lineCount);
    recordWidestLine(lineSize);
  }
  
  private void recordWidestLine(int lineSize) {
    if(lineSize > maxLineWidth) {
      maxLineWidth = lineSize;
      widestLineNumber = lineCount;
    }
  }
  
  public int getLineCount() {
    return lineCount;
  }
  
  public int getMaxLineWidth() {
    return maxLineWidth;
  }
  
  public int getWidestLineNumber() {
    return widestLineNumber;
  }
  
  public LineWidthHistogram getLineWidthHistogram() {
    return lineWidthHistogram;
  }
  
  public double getMeanLineWidth() {
    return (double) totalChars / lineCount;
  }
  
  public int getMedianLineWidth() {
    Integer[] sortedWidths = getSortedWidths();
    int cumulativeLineCount = 0;
    for (int width : sortedWidths) {
      cumulativeLineCount += lineCountForWidth(width);
      if(cumulativeLineCount > lineCount / 2)
        return width;
    }
    throw new Error("Cannot get here");
  }
  
  private int lineCountForWidth(int width) {
    return lineWidthHistogram.getLinesForWidth(width).size();
  }
  
  private Integer[] getSortedWidths() {
    Set<Integer> widths = lineWidthHistogram.getWidths();
    Integer[] sortedWidths = (widths.toArray(new Integer[0]));
    Arrays.sort(sortedWidths);
    return sortedWidths;
  }
}