Ranchers,Clarification on UTF-8 in Java

[Henry Wong]

where are the three junk characters as referred by Henry. ??? or is this the correct output code ???

It looks like I was wrong, while it is 3 junk bytes, the read() method will take it all out as one character -- so you're right, reading one character should be fine.

BTW, where is the code that does a reset(), if it is not junk? You seem to just assume that it is junk -- which means, there is no reason to mark() since you don't intend to reset().

Henry

[Paul Clapham]

Deepak Lal wrote: i should get 3 junk characters,but now im getting as below
{
The value of k 65279 (what is this referring to)
The value of k 49 which is correct for charValue(1)
The value of k 48 which is correct for charValue(0)
}

I don't know why you think you should get three "junk" characters. It's pretty obvious from what you posted there that the reader has made the BOM into a single character, so your first three characters consist of the BOM and the two characters which follow it. You're making this simple thing far too complicated, I think.

[Deepak Lal]

Hi Henry,
Can you please refine this code....please......

It looks like I was wrong, while it is 3 junk bytes, the read() method will take it all out as one character -- so you're right, reading one character should be fine.

BTW, where is the code that does a reset(), if it is not junk? You seem to just assume that it is junk -- which means, there is no reason to mark() since you don't intend to reset().

Code is as below:

       public class TestUTF{
           public static BufferedReader check(){
                 BufferedReader bufferedReader = null;
		              
            try
                {
                 bufferedReader.mark(3);
                 for(int k=1;k<=3;k++){
                	 int i = bufferedReader.read(); 
                	 System.out.println("The value is "+i);
                	 if( i == 65279){
                		  return bufferedReader; 
                	 }else{
                		 bufferedReader.reset(); 
                		 return bufferedReader; 
                	 }
                 }                                                                                                
            }catch(Exception e){
                 System.out.println("Exception raised ::"+e.getMessage());
            }
		
            return bufferedReader;     // only need to return bufferedReader object.	
        }

             public static void main(String args[]) throws IOException {		 						
		BufferedReader br = TestUTF.check();
		System.out.println("Bufferedreader "+br.readLine());
	}
  }	

Could you please review it once ???

[Henry Wong]

The only issue that I have is here...

BufferedReader bufferedReader = null;

Your previous code used to open the file -- this one doesn't. It just assigns a null. And should get you a null pointer exception when you try to use the buffer reader.

Other minor issues include....

1. Since you only read one character now, there is no reason to have the loop. You can get rid of that.

2. Since UTF-8 characters are less than 256. You can probably get away with checking if it is greater than 256, than if it equals 65279.


But everything else looks great, BTW...

Henry

[Deepak Lal]

Thanks a lot henry....i need to refine the code again....
Thanks to all the Ranchers.



Will be back with more queries in Java.....

Regards
Deepak Lal