Extract substring from text

Question

I'm writing a parser, where it reads all lines in a particular file and processes it!! I got stuck with this substring Abc [123] where ABC should be stored at as one string, and 123 as other string.so i came up with this solution

lines.get(i).substring(0,lines.get(i).lastIndexOf("["))

this get me the string abc

lines.get(i).substring(lines.get(i).lastIndexOf("["));

and aboveone gets me the string 123] but i dont want ] at last any updation can i make for my approach?

Eran · Accepted Answer · 2019-11-24T13:29:32.987

1

Change

lines.get(i).substring(lines.get(i).lastIndexOf("["));

to

lines.get(i).substring(lines.get(i).lastIndexOf("[") + 1,lines.get(i).lastIndexOf("]"));

edited Nov 24 '19 at 13:29

answered Nov 24 '19 at 13:15

Eran

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score 0 · Answer 2 · answered Nov 24 '19 at 13:40

What about using a regular expression in combination with groups?

Pattern pattern = Pattern.compile("([A-Za-z ]{1,})([\[]{1})([0-9]{1,})");
for(String line : lines){
  Matcher matcher = pattern.matcher(line);
  while (matcher.find()) {
    System.out.println("group 1: " + matcher.group(1));
    System.out.println("group 3: " + matcher.group(3));
  }
}

Extract substring from text

2 Answers2