how to write a java method that read strings seperated by commas

Question

i intend to read lines of numbers separated by comma's example below

08090417241, 080904152335, 080998766231, 080913456786, 08035467901, 08070415243, 080675534387, 080355525288, 080345887698, 0809966355343, ...

to the last number.

The original code I used in my program is this

 String file1 = FileArea6.getText();

This gives an error when I try to read the numbers with the above example. But when the numbers are arranged in the order below, it's read perfectly.

08035467901
08035474477
08024444448
08012233333
09033222333.......

What is the right way to read using the first example, i.e. separated by comma's?

What error are you getting? Could you please provide more info — TheCodingFrog, Jun 23 '15 at 15:10

score 2 · Answer 1 · answered Jun 23 '15 at 15:05

2

All you need is str.split(',')

List<String> nums = Arrays.asList(str.split("\\s*,\\s*"));

or

List<String> nums = Arrays.asList(str.split(","));

or

String[] nums = str.split(",");

answered Jun 23 '15 at 15:05

meteor

2,518
4
38
52

score 0 · Answer 2 · answered Jun 23 '15 at 15:13

The following simple code snippet should work.

            try {
                BufferedReader bReader = new BufferedReader(new FileReader("input file"));
                String line = "";
                while ((line = bReader.readLine()) != null) {
                    String[] strArray = line.split(",");
                    for (String str : strArray) {
                        System.out.println( str.trim());

                        }
                    }
                }

            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

score 0 · Answer 3 · answered Jun 23 '15 at 15:27

String[] separateByComma(String s){
    String[] tmp = s.split(",");
    int n = 0, i=0;

    while(i<tmp.length){
        if(check(tmp[i])) tmp[n++] = tmp[i]; 
        i++;
    }       
    if(n==0) return null;

    String[] res = new String[n];

    while(--n >= 0) res[n] = tmp[n];
    return res;
}

/*
 * Your check function
 * You can filter anything
 */
boolean check(String s){
    if(s==null || s.length()<1) return false;
    return true;
}

how to write a java method that read strings seperated by commas

3 Answers3