java/w8/CacheTest.java

public class CacheTest {
    public static void main(String[] args) {
        // 创建缓存实例
        Cache<String, Integer> ageCache = new Cache<>(100);
        
        // 存入数据
        ageCache.put("Alice", 25);
        ageCache.put("Bob", 30);
        ageCache.put("Charlie", 35);
        
        // 获取数据
        System.out.println("Alice's age: " + ageCache.get("Alice"));
        
        // 测试缓存未命中
        Integer davidAge = ageCache.get("David");
        System.out.println("David's age: " + davidAge);
        
        // 查看统计信息
        System.out.println(ageCache.getStats());
        
        // 使用 Optional API
        ageCache.getOptional("Eve").ifPresentOrElse(
            age -> System.out.println("Found: " + age),
            () -> System.out.println("Eve not found")
        );
    }
}