[SOLVED] Replace Arraylist with everything except for numbers in Java

Replace Arraylist with everything except for numbers in Java

I have a Arraylist, like this:

ArrayList<String> moisturizersPrices = [Price: Rs. 365, Price: Rs. 299, Price: Rs. 12, Price: 220, Price: 95, Price: 216]

for that I am using following logic:

moisturizersPrices.replaceAll("[^0-9.]", "")

and it is returning me something like this:

[.365, .299, .12, 220, 95, 216]

Now I want to remove all characters from there, except for numeric, such as it should be giving me results like this:

[365, 299, 12, 220, 95, 216]

I need to know, where I am making mistake.

Solution

You could try a Pattern match like

List<String> moisturizersPrices = List.of(
    "Price: Rs. 365",
    "Price: Rs. 299", 
    "Price: Rs. 12", 
    "Price: 220", 
    "Price: 95", 
    "Price: 216"
);
Pattern p = Pattern.compile("[0-9]+$");
List<Integer> numbers = moisturizersPrices.stream()
    .map(p::matcher)
    .filter(Matcher::find)
    .map(m -> Integer.parseInt(m.group()))
    .collect(Collectors.toList());

[365, 299, 12, 220, 95, 216]