[LANG-646] StringEscapeUtils.unescapeJava doesn't handle octal escapes and Unicode with extra u

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.5
• Fix Version/s: 3.0
• Component/s: lang.*

Environment

Irrelevant

• Assignee: Unassigned
• Reporter: polygenelubricants
• Created: 22/Aug/10 17:46
• Updated: 17/Jan/11 05:35
• Resolved: 17/Jan/11 05:35

Description

CODE TO REPRODUCE BUG:

System.out.println("\45");
// %
System.out.println(StringEscapeUtils.unescapeJava("\\45"));
// 45, should be %

System.out.println("\uu0030");
// 0
System.out.println(StringEscapeUtils.unescapeJava("\\uu0030"));
// throws NestableRuntimeException:

This is not compliant with the JLS, which allows both [OctalEscape] and extraneous u for [UnicodeMarker] in Java string literal.

REFERENCES:

3.10.6 Escape Sequences for Character and String Literals
http://java.sun.com/docs/books/jls/third_edition/html/lexical.html#3.10.6

3.3 Unicode Escapes
http://java.sun.com/docs/books/jls/third_edition/html/lexical.html#3.3

EXTERNAL LINKS:

http://stackoverflow.com/questions/3537706/howto-unescape-a-java-string-literal-in-java/