How to converts this string to a new character array???

I have string that get from g.getDirectory();
that string is "D:\Songs\Judas Priest"
and I want to convert to charArray[][] = {{"D",":","\","S","o","n",.....}};
how can I do it??
:'(

I have ploblem again :'(
indeed I want to change string
D:\Songs\Judas Priest
to
D:/Songs/Judas Priest
I do this for upload my picture to program by directory
but when I use getDirectory();
It only save "D:\Songs\Judas Priest"
so I must change "\" to "/"
I think I must use "for" and check if it found "\" it will be change to "/"
but I don't know how to write?
public String[][] sliceNwrap(String str){
     dir[0] = new String[str.length()];
     for(int ndx=0;ndx<str.length();ndx++){
          if(str.substring(ndx, ndx+1)=="\\"){
               dir[0][ndx]= "/";
          else{
               dir[0][ndx] = str.substring(ndx, ndx+1);
     return dir;
It still "D:\Songs\Judas Priest" :'( help me plz

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