拆下方括号，然后用卷曲括号取代

Question

I am trying to replace all the square brackets with the curly brackets.

Example:

String string = "{\"test\":{\"id\":["4,5,6"}]},{\"Tech\":["Java,C++"]}}";

I want to remove square brackets([,]) and replace them with curly brackets({,}).

Like:

"{\"test\":{\"id\":{"4,5,6"}}},{\"Tech\":{"Java,C++"}}}";

I have tried:

string = string.replace("\\[", "\\{").replace("\\]", "\\}");

But didnt worked.Need some suggestions here.

Answer 1

You don't need \\\\[ and \\\\{ for that you don't get the correct result, instead you can use :

System.out.println(string.replace("[", "{").replace("]", "}"));

Note

Your are using an invalid String you have to use \\ before "\\"" like this :

String string = "{\"test\":{\"id\":[\"4,5,6\"}]},{\"Tech\":[\"Java,C++\"]}}";

Answer 2

you can either do this:

str.replace('[', '{').replace(']', '}');

or you can do this:

str.replaceAll("\\[", "{").replaceAll("\\]", "}");

Replace uses Characters, thus the ' ' whereas replaceAll uses Regex. This is why you should escape your bracket there.