CODEWITHSUNDEEP
javastringarraylistsplitsubstring
user2328079
user2328079

Reputation: 111

Extract String parts and add to ArrayList

I have a problem with String substring option. I wanted to add some parts from a String into an ArrayList, but I only get to add the first text.

ArrayList<String> arr = new ArrayList<String>();
String text = "[\"text1\",\"text2\",\"text3\"]";

   text = text.substring(text.indexOf("\"") + 1);
   text = text.substring(0, text.indexOf("\""));

   arr.add(text);


   for (int i = 0; i < arr.size(); i++) {
        System.out.println(arr.get(i));
   }

The output for this is:

text1

I would like the add all "texts" in the Array, each one in a different position:

text1
text2
text3

Is there any possibility to do this? Thanks in advance.

Upvotes: 2

Views: 1361

Answers (4)

Boris the Spider
Boris the Spider

Reputation: 61198

You can using split fairly easily:

public static void main(final String[] args) throws Exception {
    final String input = "[\"text1\",\"text2\",\"text3\"]";
    final List<String> output = new ArrayList<>();
    for(final String item : input.replaceAll("^\\[\"|\"\\]$", "").split("\",\"")) {
        output.add(item);
    }
    for(final String item : output) {
        System.out.println(item);
    }
}

Output:

text1
text2
text3

The String you are trying to parse looks amazingly like the output of Collection.toString, if that's the case then this is all wrong...

Upvotes: 1

Nambi
Nambi

Reputation: 12040

String#split using the regex and don't add the first and last element in the array to the arraylist.

String str[]=text.split("\"(,)?");
ArrayList<String> arr=new ArrayList<String>();

for(int i=1;i<str.length-1;i++){
 System.out.print(str[i]+"\n");
    arr.add(str[i]);

                }

OUTPUT:

text1
text2
text3

Upvotes: 1

Nir Alfasi
Nir Alfasi

Reputation: 53565

Run:

    String text = "[\"text1\",\"text2\",\"text3\"]";
    Pattern p = Pattern.compile("\"(.*?)\"");
    Matcher m = p.matcher(text);
    while (m.find()) {
        System.out.println(m.group());
    }

OUTPUT:

"text1"
"text2"
"text3"

Upvotes: 2

Rogue
Rogue

Reputation: 11483

How about a regex pattern?:

String text = "[\"text1\",\"text2\",\"text3\"]";
String[] split = text.split("\"(,)?");

Upvotes: 0

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