src/main/java/de/jformchecker/elements/DateInputSelectCompound.java
public Date getLegacyDateValue() {
    if (internalDate == null) {
      return null;
    }
    return Date.from(internalDate.atStartOfDay(ZoneId.systemDefault()).toInstant());
  }
public Date getLegacyDateValue() {
    if (internalDate == null) {
      return null;
    }
    return Date.from(internalDate.atStartOfDay(ZoneId.systemDefault()).toInstant());
  }
Get internal Date as Date (Please avoid this, because LocalDate is far better.)

@return