Name: nt126004 Date: 03/26/2003


FULL PRODUCT VERSION :
java version "1.4.1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-b21)
Java HotSpot(TM) Client VM (build 1.4.1-b21, mixed mode)

FULL OS VERSION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
The methods String.getBytes(String charsetName) and new String(byte[] bytes, String charsetName) should be complimentary (unless characters in the string are not defined in the specified charset). For any String, you should be able to create a byte array with getBytes and then create a new String from the byte array such that the new String is equivalent to original String.
 
When the charsetName is "Shift_JIS" and the String contains a Yen character, the method String.getBytes returns a value of 0x5C. This is correct behavior. However, the method new String(bytes, charsetName) converts the byte back to a String containing the Reverse Solidus character instead of the Yen character. This is not correct behavior.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
See the example program RoundTrip.java

EXPECTED VERSUS ACTUAL BEHAVIOR :
When the charset is Shift_JIS, a byte with value 0x5C should be converted to a character with unicode value 0xA5.
The byte value 0x5C is converted to Unicode value 0x5c.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public class RoundTrip{
    public static void main (String args[]){
        String csName = "Shift_JIS";
        String testString = "\u3072\u00a5"; //HIRAGANA LETTER HI, YEN SIGN
        roundTrip(csName, testString);
    }
    
    //do a round-trip conversion from String to byte[] and back to String
    private static void roundTrip(String csName, String testString){
     try{
     /* depending on your configuration, the unicode
                        characters may not
     display correctly. This is not relevant to the issue
                        at hand
     though. */
    
     // display the arguments passed in
         System.out.println("encode and decode '" + testString + "' using " + csName);
         System.out.print("Unicode values: ");
         int len = testString.length();
        
         //display the numeric value of each character before encoding
         for (int n = 0; n < len; n++){
             int val = testString.charAt(n);
             System.out.print(val);
             System.out.print(" ");
         }
         System.out.println();
         System.out.println();

         //encode to bytes using the specified charsetName
         byte[] b = testString.getBytes(csName);
         System.out.print("Encoded bytes: ");
        
         //display the encoded values
         for (int n = 0; n < b.length; n++){
         System.out.print(b[n]);
         System.out.print(" ");
         }
         System.out.println();
         System.out.println();

         //convert the bytes back to a String
         String decode = new String(b, csName);
         System.out.println("Decoded String " + decode);
         System.out.print("Unicode values: ");
         len = decode.length();
        
         //display the numeric value of each character again
         for (int n = 0; n < len; n++){
             int val = decode.charAt(n);
             System.out.print(val);
             System.out.print(" ");
         }
         System.out.println();
        }
        catch (Throwable t){
         System.out.println(t);
        }
        
    }
}
---------- END SOURCE ----------
(Review ID: 183058)
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