How To replace character in android?

Question

I am try to replace character where come"." it should be replace by "". but its not working for me. please anyone tell me what i am missing in my code?

       // that variable is define publically
        public class QuizActivity extends Activity {
        private static String ans = null;
        int j = 0;

     //here some functionality

   next.setOnClickListener(new View.OnClickListener() {

                            @Override
                            public void onClick(View v) {
                                // TODO Auto-generated method stub
                                 empty();
                                 checkbox_enable();
                                 Custom_checkbox();

                                final int arraysize = data.size();

                                    j++;
                                if(j<arraysize){

                                     String Quiz_no = data.get(j).getQuiz_no();
                                     String Question = data.get(j).getQuestion();
                                     op1 = data.get(j).getAnswer_1().trim().toString();
                                     ans = data.get(j).getAns().trim();
                                     String answer=ans.toString();


                                     for (int k = 0; k < answer.length(); k++) {

                                        if (answer.charAt(k) == '.') {


                                            answer.replace(".", "");



                                        }if (answer.charAt(k) == ' ') {

                                            answer.replace(" ", "");
                                   String temp = answer;
                                Toast.makeText(QuizActivity.this, "replaced   "+temp,

 Toast.LENGTH_LONG).show();
                                        }
                                    }

please anyone help me . it is not working for me

http://stackoverflow.com/questions/7380626/how-to-replace-dot-in-a-string-in-java — nano_nano, May 30 '16 at 08:59
You need to store output of `answer.replace(".", "");` in some variable. — Shree Krishna, May 30 '16 at 09:03

score 1 · Answer 1 · answered May 30 '16 at 09:00

1

simply use replaceAll on String you want to replace.

For Example

String test = "hello.say.something";
test.replaceAll(".","");
Toast.makeText(getApplicationContext(),test,Toast.LENGTH_SHORT).show();

Result : hellosaysomething

Happy coding..

answered May 30 '16 at 09:00

V-rund Puro-hit

5,518
9
31
50

score 1 · Answer 2 · edited May 23 '17 at 12:16

1

A possible duplicate of How to Replace dot (.) in a string in Java.

So, instead of looping through your answer-string and checking each character, you can simply use .replaceAll. So change your code into something like this:

...
if(j<arraysize){
  String Quiz_no = data.get(j).getQuiz_no();
  String Question = data.get(j).getQuestion();
  op1 = data.get(j).getAnswer_1().trim().toString();
  ans = data.get(j).getAns().trim();
  String answer=ans.toString();
  //no need to loop through answer-string
  answer = answer.replaceAll(".","");
}

Hope this helps.

edited May 23 '17 at 12:16

Community

1
1

answered May 30 '16 at 09:07

ishmaelMakitla

3,784
3
26
32

not working still @ishmaelMakitla – sajid Hussain May 30 '16 at 09:19
Edited the code - `answer = answer.replaceAll(".","");` - this should do it. – ishmaelMakitla May 30 '16 at 09:33

Burak Day · Accepted Answer · 2016-05-30T09:05:35.967

0

Because replace or replaceAll doesn't overwrite on the string. You should use:

answer = answer.replaceAll(".", "");
answer = answer.replaceAll(" ", "");

edited May 30 '16 at 09:05

answered May 30 '16 at 09:00

Burak Day

907
14
28

not replace, not working @Burak Day – sajid Hussain May 30 '16 at 09:04
@saim check new answer – Burak Day May 30 '16 at 09:05
1

its Working for me now @Burak Day – sajid Hussain May 30 '16 at 09:32

score 0 · Answer 4 · answered May 30 '16 at 09:06

You should know that Strings are immutable, so you need to store the output of answer.replace(".", ""); in some new variable or to the same variable, So do like this

 String replacedString = null;

 for (int k = 0; k < answer.length(); k++) {
    if (answer.charAt(k) == '.') {
        replacedString = answer.replace(".", "");

    }if (answer.charAt(k) == ' ') {
        replacedString  = answer.replace(" ", "");
    }
}

OR

answer = answer.replace(".", "");

How To replace character in android?

4 Answers4