var dirPath = Paths.get("C:\\tmp", "sample"); //The path to be tested.
if (dirPath.toFile().isDirectory()) { //Check if the directory exists.
try (Stream<Path> entries = Files.list(dirPath)) {
if (entries.findFirst().isEmpty()) {
System.out.printf("%s is empty.", dirPath);
}
}
}Category: Java 11
Resolve modules from the root module using the following syntax:
java --show-module-resolution -p <MODULE_PATHS> -m <ROOT_MODULE>| Identifier | Description |
|---|---|
| MODULE_PATHS | List of modules paths delimited by semi-colon (i.e. ;). |
| ROOT_MODULE | The module to start the resolution. |
//Create an instance of HttpClient using its builder.
HttpClient httpClient = HttpClient.newBuilder()
.version(HttpClient.Version.HTTP_2)
.build();
//Create an instance of HttpRequest using its builder.
HttpRequest req = HttpRequest.newBuilder(URI.create("https://www.google.com"))
.GET()
.build();
/* Use the httpClient.sendAsync() method and encapsulate the response
in the CompletableFuture. */
CompletableFuture<HttpResponse> resFuture =
httpClient.sendAsync(req, HttpResponse.BodyHandlers.ofString());
//Use the resFuture.thenAccept to wait for the async response.
resFuture.thenAccept(res -> System.out.println(res.version()));
//Wait for the resFuture to to complete.
resFuture.join();
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