此代码如何使该十六进制值？

Question

can any one explain me "in details" how this code makes a .cfg file that is like the picture in the left? I wanna change it so that it becomes like the right one?

setLastFileInTNM(getTnmInstalledPath(), getLastPath());

private void setLastFileInTNM(String TNMConfigFilePath, String fileTobeSetInTNM) throws Exception {
    //fileTobeSetInTNM  += " ";
    File file = new File(TNMConfigFilePath);
    char[] dt = fileTobeSetInTNM.toCharArray();

    char[] data = readFile(file);

    int offset = 145;
    int length = fileTobeSetInTNM.length();

    int j = 0;
    for (int i = 145; i < offset + length; i++) {
        if (j == dt.length) {
            break;
        }
        data[i] = dt[j];
        j++;
    }
    data[offset + length] = (char) 0;//for seprating the rest
    writeToFile(data, file);
    readFile(file);
}

This code writes an address in the .cfg file. the picture below is comparing two .cfg file in notepad++. The left one is made by the code above, I want to change the code so that the hex type becomes like the right picture. how should i change the code?

Answer 1

The text on the right says

" D : \\ MDS 8 3 1 0 . hex " , while the text on the left says

" D:\\MDS 8310.hex 1 0 . hex " .

This suggests that the encoding of the data in the original file is 16-bit per character, leaving every second character as space, and on the left you just copy each character as a byte, thus getting the file name too condensed. If you want to do it in this low level style, just add line

data[++i] = 0x20; 

after line:

data[i] = dt[j];

and increase the upper bound of the for loop to offset + length * 2

I do not see why your file is modified also on the line 29 and on the line 6, but that may depend on the rest of your code.