Regular expression for price - Android

Question

I have a string like bellow :

dfdfm;lg 2500$ jshfsnefsfz5405€mnvkjdf64rfmkd554668¢ odsfrknegj 885486¥ dsflkef 588525dollar

I am getting bellow values with this [\\d,]+\\s*\\$|[\\d,]+\\s*€|[\\d,]+\\s*¥|[\\d,]+\\s*¢|[\\d,]+\\s*dollar :

2500$ 5405€ 554668¢ 885486¥ 588525dollar

Problem : But I don't need to these $ € ¢ ¥ dollar . How I can delete these in top regex ?

Here is my method :

private String getPrice(String caption) {
    String pricePattern = "[\\d,]+\\s*\\$|[\\d,]+\\s*€|[\\d,]+\\s*¥|[\\d,]+\\s*¢|[\\d,]+\\s*dollar|[\\d,]+\\s*Euro";
    List<String> lstPrice = new ArrayList<>();
    Pattern rPrice = Pattern.compile(pricePattern);
    Matcher mPrice = rPrice.matcher(caption);
    while (mPrice.find()) {
        lstPrice.add(mPrice.group());
    }
    if (lstPrice.size() > 0) {
        return lstPrice.get(0);
    }
    return "";
}

Answer 1

If you need to return all prices, make sure your getPrice method returns List<String> and adjust the regex to match the prices but capture the numbers only:

private List<String> getPrice(String caption) {
    String pricePattern = "(?i)(\\d[\\d,]*)\\s*(?:[$€¥¢]|dollar|Euro)";
    List<String> lstPrice = new ArrayList<>();
    Pattern rPrice = Pattern.compile(pricePattern);
    Matcher mPrice = rPrice.matcher(caption);
    while (mPrice.find()) {
        lstPrice.add(mPrice.group(1));
    }
    return lstPrice;
}

See the Java demo online.

String s = "dfdfm;lg 2500$ jshfsnefsfz5405€mnvkjdf64rfmkd554668¢ odsfrknegj 885486¥ dsflkef 588525dollar";
System.out.println(getPrice(s)); 

returns

[2500, 5405, 554668, 885486, 588525]

Pattern details:

• (?i) - a case insensitive modifier (embedded flag option)
• (\\d[\\d,]*) - Group 1 capturing a digit and then 0+ digits or ,
• \\s* - 0+ whitespaces
• (?:[$€¥¢]|dollar|Euro) - either $, €, ¥, ¢, dollar or euro (case insensitive search is enabled via (?i))