Java HashMap 性能优化替代方案

如何优化 Java HashMap 的性能/替代方案

HashMap map = new HashMap<>(16, 0.75f);

class CustomKey {
    private String key;
    // 自定义哈希函数
    @Override
    public int hashCode() {
        // 哈希计算逻辑
    }
}

ConcurrentHashMap map = new ConcurrentHashMap<>();

String key = "example";
int hashCode = Hashing.sha256().hashString(key, StandardCharsets.UTF_8).asInt();

TreeMap map = new TreeMap<>();

LinkedHashMap map = new LinkedHashMap<>();

Cache cache = CacheBuilder.newBuilder()
        .maximumSize(100)
        .expireAfterWrite(10, TimeUnit.MINUTES)
        .build();