Replacing the parentheses in a string

Question

I'm getting response from the server like this "[ 61 ]" I want to get rid of the parentheses and keep the numbers only.

This is what I did, but this does not work for dynamic responses, it only fits static number, but if the number gets bigger, this doesn't work

@Override
public void onResponse(String response) {
    StringBuffer sb = new StringBuffer(response);

    sb.deleteCharAt(0);
    sb.deleteCharAt(7);
    numberofvotes.setText("Counts : " + sb.toString().trim());
}

How can I remove parentheses anywhere in the string?

Answer 1

To keep only the number, you can use String::replaceAll which use regular expression like this :

//response = "[ 61 ]";
response.replaceAll("[^\\d]", ""); // Output '61'

Which mean replace all non digits.

Or like Pshemo mention you can use :

response.replaceAll("\\D", "");