How to use

substring

method

in

java.lang.String

private static String secondaryName(String javaName) {
 if (javaName.startsWith("TLS_")) {
  return "SSL_" + javaName.substring(4);
 } else if (javaName.startsWith("SSL_")) {
  return "TLS_" + javaName.substring(4);
 } else {
  return javaName;
 }
}

 private static String getSubmittedFileName(Part part) {
  for (String cd : part.getHeader("content-disposition").split(";")) {
    if (cd.trim().startsWith("filename")) {
      String fileName = cd.substring(cd.indexOf('=') + 1).trim().replace("\"", "");
      return fileName.substring(fileName.lastIndexOf('/') + 1).substring(fileName.lastIndexOf('\\') + 1); // MSIE fix.
    }
  }
  return null;
}

@VisibleForTesting
static String getClassName(String filename) {
 int classNameEnd = filename.length() - CLASS_FILE_NAME_EXTENSION.length();
 return filename.substring(0, classNameEnd).replace('/', '.');
}

/** Add an header line containing a field name, a literal colon, and a value. */
public Builder add(String line) {
 int index = line.indexOf(":");
 if (index == -1) {
  throw new IllegalArgumentException("Unexpected header: " + line);
 }
 return add(line.substring(0, index).trim(), line.substring(index + 1));
}

 @Override
 Optional<String> chop(String str) {
  if (str.endsWith(suffix)) {
   return Optional.of(str.substring(0, str.length() - suffix.length()));
  } else {
   return Optional.absent();
  }
 }
};

 @FromJson HttpUrl urlFromJson(String urlString) {
  if (urlString.startsWith("wss:")) urlString = "https:" + urlString.substring(4);
  if (urlString.startsWith("ws:")) urlString = "http:" + urlString.substring(3);
  return HttpUrl.get(urlString);
 }
}

private static @Nullable String convertDottedQuadToHex(String ipString) {
 int lastColon = ipString.lastIndexOf(':');
 String initialPart = ipString.substring(0, lastColon + 1);
 String dottedQuad = ipString.substring(lastColon + 1);
 byte[] quad = textToNumericFormatV4(dottedQuad);
 if (quad == null) {
  return null;
 }
 String penultimate = Integer.toHexString(((quad[0] & 0xff) << 8) | (quad[1] & 0xff));
 String ultimate = Integer.toHexString(((quad[2] & 0xff) << 8) | (quad[3] & 0xff));
 return initialPart + penultimate + ":" + ultimate;
}

 private static String firstCharOnlyToUpper(String word) {
  return word.isEmpty()
    ? word
    : Ascii.toUpperCase(word.charAt(0)) + Ascii.toLowerCase(word.substring(1));
 }
}

 @Override
 public String apply(String from) {
  return (from.length() == 0) ? from : from.substring(1);
 }
}

 @Override
 public String apply(String from) {
  return ((from == null) || "".equals(from)) ? null : from.substring(1);
 }
};

String consumeTokenIfPresent(CharMatcher matcher) {
 checkState(hasMore());
 int startPosition = position;
 position = matcher.negate().indexIn(input, startPosition);
 return hasMore() ? input.substring(startPosition, position) : input.substring(startPosition);
}

  @Override
  public Object apply(Integer v) throws Exception {
    return Thread.currentThread().getName().substring(0, 4);
  }
}),

  @Override
  public Object apply(Integer v) throws Exception {
    return Thread.currentThread().getName().substring(0, 4);
  }
})

  @Override
  public Object apply(Integer v) throws Exception {
    return Thread.currentThread().getName().substring(0, 4);
  }
}),

  @Override
  public Object apply(Integer v) throws Exception {
    return Thread.currentThread().getName().substring(0, 4);
  }
}),

  @Override
  public Object apply(Integer v) throws Exception {
    return Thread.currentThread().getName().substring(0, 4);
  }
}),

  @Override
  public Object apply(Integer v) throws Exception {
    return Thread.currentThread().getName().substring(0, 4);
  }
}),

  @Override
  public Object apply(Integer v) throws Exception {
    return Thread.currentThread().getName().substring(0, 4);
  }
}),

  @Override
  public Object apply(Integer v) throws Exception {
    return Thread.currentThread().getName().substring(0, 4);
  }
})

/** Equivalent to {@code string.substring(pos, limit).trim()}. */
public static String trimSubstring(String string, int pos, int limit) {
 int start = skipLeadingAsciiWhitespace(string, pos, limit);
 int end = skipTrailingAsciiWhitespace(string, start, limit);
 return string.substring(start, end);
}