hi istart learn java and ihave problem with helloworld file

C:\Documents and Settings\RTKWAR> cd\mywork

C:\mywork>dir
Volume in drive C is DRV1_VOL1
Volume Serial Number is 3563-BF60

Directory of C:\mywork

02/12/2012 12:27 PM <DIR> .
02/12/2012 12:27 PM <DIR> ..
02/12/2012 12:45 PM 244 HelloJavaWorld.java
1 File(s) 244 bytes
2 Dir(s) 21,850,640,384 bytes free

C:\mywork> set path=%path%;c:\program files\java\jdk1.7.0_01\bin



C:\mywork> javac HelloJavaWorld.java

But Iget This Error

HelloJavaWorld.java:1: error: illegal character: \0
*■p u b l i c c l a s s H e l l o J a v a W o r l d
^
HelloJavaWorld.java:1: error: illegal character: \0
*■p u b l i c c l a s s H e l l o J a v a W o r l d
^
HelloJavaWorld.java:2: error: illegal character: \0

^
HelloJavaWorld.java:3: error: illegal character: \0
{
^
HelloJavaWorld.java:3: error: illegal character: \0
{
^
HelloJavaWorld.java:4: error: illegal character: \0

^
HelloJavaWorld.java:5: error: illegal character: \0
p u b l i c s t a t i c v o i d m a i n ( S t r i n g a r g s [
] )
^
HelloJavaWorld.java:5: error: illegal character: \0
p u b l i c s t a t i c v o i d m a i n ( S t r i n g a r g s [
] )
^
HelloJavaWorld.java:5: error: illegal character: \0
p u b l i c s t a t i c v o i d m a i n ( S t r i n g a r g s [
] )
^
HelloJavaWorld.java:5: error: illegal character: \0
p u b l i c s t a t i c v o i d m a i n ( S t r i n g a r g s [
] )
^
HelloJavaWorld.java:5: error: illegal character: \0
p u b l i c s t a t i c v o i d m a i n ( S t r i n g a r g s [
] )
^
HelloJavaWorld.java:5: error: illegal character: \0
p u b l i c s t a t i c v o i d m a i n ( S t r i n g a r g s [
] )
^
HelloJavaWorld.java:5: error: illegal character: \0
p u b l i c s t a t i c v o i d m a i n ( S t r i n g a r g s [
] )
^
HelloJavaWorld.java:5: error: illegal character: \0
p u b l i c s t a t i c v o i d m a i n ( S t r i n g a r g s [
] )
^
HelloJavaWorld.java:5: error: illegal character: \0
p u b l i c s t a t i c v o i d m a i n ( S t r i n g a r g s [
] )
^
HelloJavaWorld.java:5: error: illegal character: \0
p u b l i c s t a t i c v o i d m a i n ( S t r i n g a r g s [
] )
^
HelloJavaWorld.java:5: error: illegal character: \0
p u b l i c s t a t i c v o i d m a i n ( S t r i n g a r g s [
] )

^
HelloJavaWorld.java:5: error: illegal character: \0
p u b l i c s t a t i c v o i d m a i n ( S t r i n g a r g s [
] )

^
HelloJavaWorld.java:5: error: illegal character: \0
p u b l i c s t a t i c v o i d m a i n ( S t r i n g a r g s [
] )

^
HelloJavaWorld.java:6: error: illegal character: \0

^
HelloJavaWorld.java:7: error: illegal character: \0
{
^
HelloJavaWorld.java:7: error: illegal character: \0
{
^
HelloJavaWorld.java:7: error: illegal character: \0
{
^
HelloJavaWorld.java:7: error: illegal character: \0
{
^
HelloJavaWorld.java:7: error: illegal character: \0
{
^
HelloJavaWorld.java:7: error: illegal character: \0
{
^
HelloJavaWorld.java:8: error: illegal character: \0

^
HelloJavaWorld.java:9: error: illegal character: \0
S y s t e m . o u t . p r i n t l n ( " H e l l o J a v a W
o r l d " ) ;
^
HelloJavaWorld.java:9: error: illegal character: \0
S y s t e m . o u t . p r i n t l n ( " H e l l o J a v a W
o r l d " ) ;
^
HelloJavaWorld.java:9: error: illegal character: \0
S y s t e m . o u t . p r i n t l n ( " H e l l o J a v a W
o r l d " ) ;
^
HelloJavaWorld.java:9: error: illegal character: \0
S y s t e m . o u t . p r i n t l n ( " H e l l o J a v a W
o r l d " ) ;
^
HelloJavaWorld.java:9: error: illegal character: \0
S y s t e m . o u t . p r i n t l n ( " H e l l o J a v a W
o r l d " ) ;
^
HelloJavaWorld.java:9: error: illegal character: \0
S y s t e m . o u t . p r i n t l n ( " H e l l o J a v a W
o r l d " ) ;
^
HelloJavaWorld.java:9: error: illegal character: \0
S y s t e m . o u t . p r i n t l n ( " H e l l o J a v a W
o r l d " ) ;
^
HelloJavaWorld.java:9: error: illegal character: \0
S y s t e m . o u t . p r i n t l n ( " H e l l o J a v a W
o r l d " ) ;
^
HelloJavaWorld.java:9: error: illegal character: \0
S y s t e m . o u t . p r i n t l n ( " H e l l o J a v a W
o r l d " ) ;
^
HelloJavaWorld.java:9: error: illegal character: \0
S y s t e m . o u t . p r i n t l n ( " H e l l o J a v a W
o r l d " ) ;
^
HelloJavaWorld.java:9: error: illegal character: \0
S y s t e m . o u t . p r i n t l n ( " H e l l o J a v a W
o r l d " ) ;
^
HelloJavaWorld.java:9: error: illegal character: \0
S y s t e m . o u t . p r i n t l n ( " H e l l o J a v a W
o r l d " ) ;
^
HelloJavaWorld.java:9: error: illegal character: \0
S y s t e m . o u t . p r i n t l n ( " H e l l o J a v a W
o r l d " ) ;

^
HelloJavaWorld.java:9: error: illegal character: \0
S y s t e m . o u t . p r i n t l n ( " H e l l o J a v a W
o r l d " ) ;

^
HelloJavaWorld.java:9: error: illegal character: \0
S y s t e m . o u t . p r i n t l n ( " H e l l o J a v a W
o r l d " ) ;

^
HelloJavaWorld.java:10: error: illegal character: \0

^
HelloJavaWorld.java:11: error: illegal character: \0
}
^
HelloJavaWorld.java:11: error: illegal character: \0
}
^
HelloJavaWorld.java:11: error: illegal character: \0
}
^
HelloJavaWorld.java:11: error: illegal character: \0
}
^
HelloJavaWorld.java:11: error: illegal character: \0
}
^
HelloJavaWorld.java:11: error: illegal character: \0
}
^
HelloJavaWorld.java:12: error: illegal character: \0

^
HelloJavaWorld.java:13: error: illegal character: \0
}
^
HelloJavaWorld.java:13: error: illegal character: \0
}
^
52 errors

C:\mywork>
any 1 can tell me whats problem?

thats HelloJavaWorld.java

public class HelloJavaWorld
{
public static void main(String args[])
{
System.out.println("Hello Java World");
}
}