如何在java中使用vertx调用api 4次后再继续

Vertx vertx = Vertx.vertx();

HttpClient client = vertx.createHttpClient();

client.get(80, "api.example.com", "/endpoint", response -> {
    // 处理响应
    response.bodyHandler(body -> {
        // 处理响应体
        System.out.println("Response body: " + body.toString());
    });
}).end();

int numCalls = 4;
CountDownLatch latch = new CountDownLatch(numCalls);

for (int i = 0; i < numCalls; i++) {
    client.get(80, "api.example.com", "/endpoint", response -> {
        // 处理响应
        response.bodyHandler(body -> {
            // 处理响应体
            System.out.println("Response body: " + body.toString());
            latch.countDown(); // 每次调用完成后减少计数器
        });
    }).end();
}

try {
    latch.await(); // 等待计数器归零
    System.out.println("All API calls completed.");
    // 在这里可以继续执行其他操作
} catch (InterruptedException e) {
    e.printStackTrace();
}