import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class StringsStartingWithNumber {
    public static void main(String[] args) {
        List<String> words = Arrays.asList("123apple", "banana", "45mango", "7up", "cherry", "99bottles");

        List<String> result = words.stream()
                .filter(word -> Character.isDigit(word.charAt(0))) // Check if first char is a digit
                .collect(Collectors.toList());

        System.out.println("Strings starting with a number: " + result);
    }
}

Output

Strings starting with a number: [123apple, 45mango, 7up, 99bottles]