fResult

import java.util.ArrayList;
import java.util.List;
import java.util.function.Function;

class PricingDiscountApp {
  public static void main(String[] args) {
    final var customer1 = new Customer("1", "John Doe", CustomerType.VIP);
    final var customer2 = new Customer("2", "Jane Doe", CustomerType.REGULAR);
    final var customer3 = new Customer("3", "Business Corp", CustomerType.BUSINESS);

fResult

import java.time.LocalDateTime;
import java.util.List;
import java.util.function.Function;
import java.util.stream.Collectors;

class DocumentProcessorApp {
  public static void main(String[] args) {
    final var trinity = new Submitter("trin123");
    final var morpheus = new Approver("morph456");

fResult

import java.math.BigDecimal;
import java.time.Duration;
import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collector;
import java.util.stream.Collectors;

class TripAnalyzerApp1 {
  private static final List<Trip> TRIPS = List.of(
      new Trip(TripType.BUSINESS, "Tokyo", Duration.ofHours(5),LocalDateTime.of(2025, 5, 25, 8, 0), "Thomas Anderson", new BigDecimal("1200.00")),

fResult

import static java.time.temporal.ChronoUnit.HOURS;

import java.time.Instant;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.atomic.AtomicLong;
import java.util.function.Function;
import java.util.function.Supplier;

fResult

sealed interface Permission permits Read, Write {}
record Read() implements Permission {}
record Write() implements Permission {}

record Execute() {}

class ResourceAction {
  public String perform(Permission permission) {
    return String.format("Performing action with %s...", permission.getClass().getSimpleName());
  }

fResult

// Basic domain record
public record Customer(String id, String email) {}

fResult

GCP Skills Boost - Challenge Lab

Test Passed:

But check progress failed:

fResult

import java.util.*;
import java.util.function.Predicate;
import java.util.stream.Stream;

class TestUtils {
  public static <Expected, Actual> void test(Expected expectedResult, Actual actualResult) {
    // System.out.printf("Expected=%s | Actual=%s\n", expectedResult, actualResult);
    final var expectedResultOpt = Optional.ofNullable(expectedResult);
    final var actualResultOpt = Optional.ofNullable(actualResult);

fResult

import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

class TestUtils {
  public static <Expected, Actual> void test(Expected expectedResult, Actual actualResult) {
    // System.out.printf("Expected=%s | Actual=%s\n", expectedResult, actualResult);
    final var expectedResultOpt = Optional.ofNullable(expectedResult);
    final var actualResultOpt = Optional.ofNullable(actualResult);

fResult