Do you know how Java read character value greater than 128/255?

I have

BufferedReader bufferedReader =
               new BufferedReader(new FileReader(inputfile_name));

int c;
while ((c = bufferedReader.read()) > -1 ) {
               if (c > (int)128) {
                   System.err.println(
                                    (char)c + " " +
                                    c + " " +
                                    Integer.toOctalString(c) + " " +
                                    Integer.toHexString(c)
                                    );
               }
}
bufferedReader.close();

This is fine, I got print all characters which ASCII value greater than
128.

Now I do the same in C

if ((fp = fopen("inputfile_name", "r")) == NULL) {
         fprintf(stderr, "Can't open %s\n", argv[1]);
         exit(2);
}
int c;
while ((c = getc(fp)) != EOF) {
        if (c > 128) {
            printf("%c %d %o %x\n", c, c, c, c);
        }
}
fclose(fp);

But in C I don't get print any character ASCII value greater than 128 by
read the same file.

I just wonder why, how do Java read those character ASCII greater
than 128?