Character matching
Your sales data sometimes contains typos or formatting errors that could break your analysis. Before calculating total revenue, you need to verify that all sales quantities contain only valid numeric characters and decimal points. You've extracted some sales quantities (in millions of units) from the video game dataset.
Este ejercicio forma parte del curso
Cleaning Data in Java
Instrucciones del ejercicio
- Check if
quantitycontains any digits (0 to 9). - Look for the decimal separator in
quantity. - Detect any alphabetic characters in
quantity(lowercase or uppercase).
Ejercicio interactivo práctico
Prueba este ejercicio y completa el código de muestra.
public class PatternValidation {
public static void main(String[] args) {
List quantities = Arrays.asList("41.49", "29.08", "15.85", "12.5x");
for (String quantity : quantities) {
// Check if quantity contains any digits
boolean hasDigits = ____.____('0', '9').matchesAnyOf(quantity);
// Look for decimal separator in quantity
boolean hasDecimal = CharMatcher.is('.').____(quantity);
// Detect any alphabetic characters in quantity
boolean hasInvalidChars = CharMatcher.inRange('____', '____')
.or(CharMatcher.inRange('____', '____')).matchesAnyOf(quantity);
boolean isValid = hasDigits && hasDecimal && !hasInvalidChars;
System.out.println(quantity + " has valid characters: " + isValid);
}
}
}