Got it, let's fix this up using only Google Guava! Your current code using CharMatcher.JAVA_DIGIT.retainFrom() works for grabbing all digits, but it concatenates them into one big string—we need to keep each separate digit sequence intact instead.

Solution Code #

Here's how to split the original string into distinct digit sequences using Guava's Splitter and CharMatcher together:

import com.google.common.base.CharMatcher;
import com.google.common.base.Splitter;
import java.util.List;
import java.util.Arrays;

public class DigitSequenceExtractor {
    public static void main(String[] args) {
        String message = "Hello Your Account NO 295093491783 is been deducted by 17820.if you did not receive the Ack call 9897123456";
        
        // Split the string using non-digit characters as separators, filter out empty strings
        List<String> digitSequences = Splitter.on(CharMatcher.JAVA_DIGIT.negate())
                                              .omitEmptyStrings()
                                              .splitToList(message);
        
        // Convert the List to a String array as requested
        String[] result = digitSequences.toArray(new String[0]);
        
        // Print to verify
        System.out.println(Arrays.toString(result));
        // Output: [295093491783, 17820, 9897123456]
    }
}

How It Works #

Let's break down the key parts:

• Splitter.on(CharMatcher.JAVA_DIGIT.negate()): This tells Guava to split the input string every time it encounters a non-digit character (since negate() flips the matcher to match everything that isn't a digit).
• .omitEmptyStrings(): When there are consecutive non-digit characters (like spaces and punctuation next to each other), splitting would create empty strings—this method filters those out so we only get valid digit sequences.
• .splitToList(): Converts the split results into a List<String>, which we then convert to a String[] using toArray() to match your desired output format.

This approach stays strictly within Guava's utilities and gives you exactly the separate digit sequences you need.

内容的提问来源于stack exchange，提问作者Prakhar Nigam