如何正确构造Java代码以将命名键下的值保存到Firebase实时数据库中

<dependency>
    <groupId>com.google.firebase</groupId>
    <artifactId>firebase-admin</artifactId>
    <version>7.0.0</version>
</dependency>

import com.google.firebase.FirebaseApp;
import com.google.firebase.FirebaseOptions;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;

// 从Firebase控制台中下载并保存服务账号密钥文件（通常为json格式）
String serviceAccountKeyPath = "/path/to/serviceAccountKey.json";

// 初始化Firebase应用程序
FirebaseOptions options = new FirebaseOptions.Builder()
        .setServiceAccount(new FileInputStream(serviceAccountKeyPath))
        .setDatabaseUrl("https://your-project-id.firebaseio.com")
        .build();
FirebaseApp.initializeApp(options);

// 获取对实时数据库的引用
FirebaseDatabase database = FirebaseDatabase.getInstance();
DatabaseReference ref = database.getReference("your-node-key");

ref.child("your-key").setValue("your-value");

import com.google.firebase.FirebaseApp;
import com.google.firebase.FirebaseOptions;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;

import java.io.FileInputStream;
import java.io.IOException;

public class FirebaseExample {
    public static void main(String[] args) {
        try {
            // 从Firebase控制台中下载并保存服务账号密钥文件（通常为json格式）
            String serviceAccountKeyPath = "/path/to/serviceAccountKey.json";

            // 初始化Firebase应用程序
            FirebaseOptions options = new FirebaseOptions.Builder()
                    .setServiceAccount(new FileInputStream(serviceAccountKeyPath))
                    .setDatabaseUrl("https://your-project-id.firebaseio.com")
                    .build();
            FirebaseApp.initializeApp(options);

            // 获取对实时数据库的引用
            FirebaseDatabase database = FirebaseDatabase.getInstance();
            DatabaseReference ref = database.getReference("your-node-key");

            // 将数据保存到实时数据库中
            ref.child("your-key").setValue("your-value");

            System.out.println("Data saved successfully.");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}