How to replace || (two pipes) from a string with | (one) pipe

Question

I am getting response for some images in json format within this tag:

\"xmlImageIds\":\"57948916||57948917||57948918||57948919||57948920||57948921||57

Answer 1

I think I know what your problem is. You need to assign the result of replace(), not just call it.

String s = "foo||bar||baz";
s = s.replace("||", "|");
System.out.println(s);

I tested it, and just calling s.replace("||", "|"); doesn't seem to modify the string; you have to assign that result back to s.

Edit: The Java 6 spec says "Returns a new string resulting from replacing all occurrences of oldChar in this string with newChar." (the emphasis is mine).

Answer 2

    String pipe="pipes||";
    System.out.println("Old Pipe:::"+pipe);
    System.out.println("Updated Pipe:::"+pipe.replace("||", "|"));

Answer 3

According to http://docs.oracle.com/javase/6/docs/api/java/lang/String.html, replace() takes chars instead of Strings. Perhaps you should try replaceAll(String, String) instead? Either that, or try changing your String ("") quotation marks into char ('') quotation marks.

Edit: I just noticed the overload for replace() that takes a CharSequence. I'd still give replaceAll() a try though.

Answer 4

Use

.replace("||", "|");

| is no special char.

However, if you are using split() or replaceAll instead of replace(), beware that you need to escape the pipe symbol as \\|, because these methods take a regex as parameter.

For example:

public static void main(String[] args) {
    String in = "\"xmlImageIds\":\"57948916||57948917||57948918||57948919||57948920||57948921||57948‌922||57948923||57948924||57948925||57948926||5794892\"".replace("||", "|");

    String[] q = in.split("\"");
    String[] ids = q[3].split("\\|");
    for (String id : ids) {
        System.out.println("http://test/" + id);
    }
}

Answer 5

i dont remember how it works that method... but you can make your own:

String withTwoPipes = "helloTwo||pipes";
   for(int i=0; i<withTwoPipes.lenght;i++){
      char a = withTwoPipes.charAt(i);
      if(a=='|' && i<withTwoPipes.lenght+1){
         char b = withTwoPipes.charAt(i+1);
         if(b=='|' && i<withTwoPipes.lenght){
           withTwoPipes.charAt(i)='';
           withTwoPipes.charAt(i+1)='|';
         }
      }
   }

I think that some code like this should work... its not a perfect answer but can help...