如何生成Java tink密钥？

<dependency>
    <groupId>com.google.crypto.tink</groupId>
    <artifactId>tink</artifactId>
    <version>1.6.1</version>
</dependency>

import com.google.crypto.tink.Aead;
import com.google.crypto.tink.KeysetHandle;
import com.google.crypto.tink.aead.AeadConfig;
import com.google.crypto.tink.aead.AeadKeyTemplates;

// 初始化Tink库
AeadConfig.register();

// 生成AES-GCM的对称密钥
KeysetHandle keysetHandle = KeysetHandle.generateNew(AeadKeyTemplates.AES128_GCM);

// 获取Aead实例
Aead aead = keysetHandle.getPrimitive(Aead.class);

// 使用生成的密钥进行加密
byte[] plaintext = "Hello, World!".getBytes();
byte[] ciphertext = aead.encrypt(plaintext, null);

// 使用生成的密钥进行解密
byte[] decrypted = aead.decrypt(ciphertext, null);
String decryptedText = new String(decrypted);