asked on

How to find a character in a file (which line and which column) which causes sun.io.MalformedException thrown

I have a piece of code inside try block like the following:

BufferedReader reader = new BufferedReader (new InputStreamReader(new FileInputStream(pFile), "UTF-8"));

text = reader.reader.readLine(); line 1

while(text != null)
{
text = reader.readLine();
}

//notes: text variable has been defined and pFile is passed from function call.

When I run the piece of code, it always throws sun.io.MalformedException at line 1.

It is very possible that it exists invalid character in pFile. Is there any way to change the piece code to find which line and which column the invalid character is located so that I can just correct it in pFile.

I did the following changes to find which line but didn't work (this change will not find which column the invalid character is located). It always print linenumber is 1. It sounds that the whole file has only one line after creating reader object using UTF-8

int linenumber = 1;
text = reader.readerLine();

while(text != null)
{
linenumber++;
text = reader.readLine();
}

Thanks for the help

enachemc

since MalformedException does not exist, you are probably reffering to MalformedURLException. This would be caused by the value of pFile variable. Which is the real value of the variable.

cplusplus030999

ASKER

sun.io.MalformedException is a famous exception. Like I said, the exception is thrown from line 1. pFile is File object without any problem. I have tried other good file and it works

ADSLMark

It would be nice to see the value of pFile and also the precise error message.

Mark

cplusplus030999

ASKER

pFile = new File("C\:\\temp\\real_file.html");

C: is c drive, temp is folder and real_file.html is file name. They will exist.

sun.io.MalformedException is just like NullPointerException. If you want to get precise error message, you will be disppointed since it is null.

ADSLMark

C\: ?? shouldn't that be C:\

Mark

ADSLMark

I mean:

pFile = new File("C:\\temp\\real_file.html");

: does not need escaping does it?

Mark

ADSLMark

Well i could have posted this all in one post but you should use the pathSeperator from the File class:

http://java.sun.com/j2se/1.4.2/docs/api/java/io/File.html

static String pathSeparator
The system-dependent path-separator character, represented as a string for convenience.
static char pathSeparatorChar
The system-dependent path-separator character.
static String separator
The system-dependent default name-separator character, represented as a string for convenience.
static char separatorChar
The system-dependent default name-separator character.

Mark

cplusplus030999

ASKER

ADSLMark,

pFile = new File("C:\\temp\\real_file.html");
and pFile = new File("C\:\\temp\\real_file.html") both work. Like I said, the file name is not an issue. I have the folder name in property file. It works for other files. Please don't take too much time on this. pFile is absolutely valid File object. Thanks.

ASKER CERTIFIED SOLUTION

ADSLMark

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cplusplus030999

ASKER

Since BufferedStream allows UTF-8 transferred but why readLine() can not reacognize that. Obviously readLine is only reading one line. If BufferedStream is UTF-8, it should know that

SOLUTION

CEHJ

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