<dependency>
<groupId>com.github.javadev</groupId>
<artifactId>underscore</artifactId>
<version>1.39</version>
</dependency>
import com.github.underscore.Function1;
import static com.github.underscore.U._;
public class StringUtils {
public static int countDigits(String input) {
return _.chain(input)
.filter(_.isNumericChar())
.count()
.value();
}
}
public class Main {
public static void main(String[] args) {
String input = "Hello123World456";
int digitCount = StringUtils.countDigits(input);
System.out.println("The number of digits in the input string is: " + digitCount);
}
}
