Name: gm110360			Date: 12/15/2003


FULL PRODUCT VERSION :
java version "1.4.2_02"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_02-b03)
Java HotSpot(TM) Client VM (build 1.4.2_02-b03, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
I think all platform

EXTRA RELEVANT SYSTEM CONFIGURATION :
nothing

A DESCRIPTION OF THE PROBLEM :
Error when replace string "\\" by "/",  or replace string "/" by "\\". or replace other more longer string contains "/" or "\\".


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
sample code:
    String str = "abcd\\efg//hijk:lmn";
    System.out.println("str = " + str);
    str = str.replaceAll("/", "\\");          //error,
    System.out.println("after replace / with \\ =" + str);
    str = str.replaceAll("\\", "/");         //error,
    System.out.println("after replace \\ with / =" + str);

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
expect string replace ok.
Other if need to replace by other way, the Java doc of Class String should point out this.
ACTUAL -
compile ok.
runtime error.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
1. error message of code str = str.replaceAll("/", "\\");
java.lang.StringIndexOutOfBoundsException: String index out of range: 1
	at java.lang.String.charAt(String.java:460)
	at java.util.regex.Matcher.appendReplacement(Matcher.java:544)
	at java.util.regex.Matcher.replaceAll(Matcher.java:646)
	at java.lang.String.replaceAll(String.java:1710)

2. error message of code str = str.replaceAll("\\", "/");
java.util.regex.PatternSyntaxException: Unexpected internal error near index 1
 ^
	at java.util.regex.Pattern.error(Pattern.java:1489)
	at java.util.regex.Pattern.compile(Pattern.java:1281)
	at java.util.regex.Pattern.<init>(Pattern.java:1030)
	at java.util.regex.Pattern.compile(Pattern.java:777)
	at java.lang.String.replaceAll(String.java:1710)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
    String str = "abcd\\efg//hijk:lmn";
    System.out.println("str = " + str);
    str = str.replaceAll("/", "\\");          //error,
    System.out.println("after replace / with \\ =" + str);
    str = str.replaceAll("\\", "/");         //error,
    System.out.println("after replace \\ with / =" + str);
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
maybe should modify function
public Matcher appendReplacement(StringBuffer sb, String replacement)
in java.util.regex.Matcher
(Incident Review ID: 230979) 
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