Page History

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In HTML, tags are case-insensitive, and can therefore be specified using uppercase, lowercase, or any mixture of cases. This noncompliant code example uses the locale-dependent String.toUpperCase() method to convert an HTML tag to upper case, to check it for further processing. The code must ignore <SCRIPT> tags, as they indicate code that is to be discarded. While the English locale would convert "titlescript" to "TITLESCRIPT", the Turkish locale will convert "titlescript" to  to "TİTLESCRİPT", and the check will fail to prune scripts from further processing.

public static void processTitleprocessTag(String tag) {
  if (!tag.toUpperCase().equals("TITLESCRIPT")) {
    return;
  } 
  // process titletag
}

Compliant Solution (Explicit Locale)

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public static void processTitleprocessTag(String tag) {
  if (!tag.toUpperCase(Locale.ENGLISH).equals("TITLESCRIPT")) {
    return;
  }
  // process titletag
}

Specifying Locale.ROOT is a suitable alternative under conditions where an English-specific locale would not be appropriate.

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public static void processTitleprocessTag(String tag) {
  Locale.setDefault(Locale.ENGLISH);

  if (!tag.toUpperCase().equals("TITLESCRIPT")) {
    return;
  }
  // process titletag
}

Compliant Solution (String.equalsIgnoreCase())

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public static void processTitleprocessTag(String tag) {
  if (!tag.equalsIgnoreCase("TITLESCRIPT")) {
    return;
  }
  // process titletag
}

Noncompliant Code Example (FileReader)

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