split String by space separated [duplicate]

Question

I need to split words by space separated in java, so I have used .split function in-order to achieve that like as shown below

String keyword = "apple mango ";
String keywords [] = keyword .split(" ");

The above code is working fine but the only is that I sometimes my keyword will contain keyword like "jack fruit" , "ice cream" with double quotes like as shown below

String keyword = "apple mango \"jack fruit\" \"ice cream\"";

In this case I need to get 4 words like apple, mango, jack fruit, ice cream in keywords array

Can anyone please tell me some solution for this

Answer 1

List<String> parts = new ArrayList<>();
String keyword = "apple mango \"jack fruit\" \"ice cream\"";

// first use a matcher to grab the quoted terms
Pattern p = Pattern.compile("\"(.*?)\"");      
Matcher m = p.matcher(keyword);
while (m.find()) {
    parts.add(m.group(1));
}

// then remove all quoted terms (quotes included)
keyword = keyword.replaceAll("\".*?\"", "")
                 .trim();

// finally split the remaining keywords on whitespace
if (keyword.replaceAll("\\s", "").length() > 0) {
    Collections.addAll(parts, keyword.split("\\s+"));
}

for (String part : parts) {
    System.out.println(part);
}

Output:

jack fruit
ice cream
apple
mango

Answer 2

I'd do it with a regex and two capturing group, one for each pattern. I'm not aware of any other way.

    String keyword = "apple mango \"jack fruit\" \"ice cream\"";
    Pattern p = Pattern.compile("\"?(\\w+\\W+\\w+)\"|(\\w+)");      
    Matcher m = p.matcher(keyword);
    while (m.find()) {
        String word = m.group(1) == null ? m.group(2) : m.group(1);
        System.out.println(word);
    }