Delete Bitbucket Branch using rest API in java

Trying to delete bibucket branch using rest api but always getting 405 or 415 or 500 as response code. Given below code snippet. Please guide!

String endPoint = "BASE_URL/rest/branch-utils/1.0/projects/<PROJECT>/repos/<REPO>/branches";
String requestJson = "{\"name\":\"refs/heads/feature/TEST\",\"dryRun\":\"false\"}";
HttpClient client = HttpClientBuilder.create().build();
HttpPut putRequest = new HttpPut(endPoint);
putRequest.addHeader("accept", "application/json");
putRequest.addHeader(AUTHORIZATION, BASIC + "passwordencrypted");

StringEntity input = new StringEntity(requestJson, StandardCharsets.UTF_8);
input.setContentType("application/json");
putRequest.setEntity(input);

HttpResponse response = client.execute(putRequest);
System.out.println("StatusCode :: " + response.getStatusLine().getStatusCode());

BufferedReader br = new BufferedReader(new InputStreamReader((response.getEntity().getContent())));
String output;
StringBuffer result = new StringBuffer();
while ((output = br.readLine()) != null) {
result.append(output);
}
System.out.println("FINAL :: " + result.toString());

Also tried with Postman, below errors. Any help will be appreciated!

{
"errors": [
{
"context": null,
"message": "An error occurred while processing the request. Check the server logs for more information.",
"exceptionName": null
}
]
}

I have tried with Post method as well, it is also causing the same issue.
java.io.IOException: Server returned HTTP response code: 415 for URL:
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
at com.bofa.dashboard.DelBitbucketBranch.test(DelBitbucketBranch.java:170)
at com.bofa.dashboard.DelBitbucketBranch.main(DelBitbucketBranch.java:31)

public static void test() throws JSONException {
		try {

			String endPoint = "BASE_URL/rest/branch-utils/1.0/projects/<PROJECT>/repos/<REPO>/branches";
			URL url = new URL(endPoint);

			HttpURLConnection conn = (HttpURLConnection) url.openConnection();
			conn.setRequestMethod("POST");
			conn.setRequestProperty("Accept", "application/json");
			conn.setRequestProperty("Authorization", "Basic " + passwordencrpted);
			conn.setDoOutput(true);
			conn.setDoInput(true);

			String requestJson = "{\"name\":\"refs/heads/feature/TEST\",\"dryRun\":\"false\"}";
			DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
			wr.write(requestJson.getBytes());

			InputStream inputStream = conn.getInputStream();
			ByteArrayOutputStream result = new ByteArrayOutputStream();
			byte[] buffer = new byte[1024];
			int length;

			while ((length = inputStream.read(buffer)) != -1) {
				result.write(buffer, 0, length);
			}
			String jsonStr = result.toString(UTF_8);

			System.out.println(jsonStr);

			wr.flush();
			wr.close();
		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (ProtocolException e) {
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

The Problem may be the 'method' which is being used for rest call.

You should use DELETE or POST method, Refer link below.

REST Resources Provided By: Bitbucket Server - Branch

Thanks Tarun! I have tried with Delete method, it works fine but it doesn't provide any response back. It seems Delete is not returning any content. Working piece of code

public static void test() throws JSONException {
        try {

            String endPoint = "BASE_URL/rest/branch-utils/1.0/projects/<PROJECT>/repos/<REPO>/branches";
            URL url = new URL(endPoint);

            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("DELETE");
            conn.setRequestProperty("Content-Type", "application/json");
            conn.setRequestProperty("Authorization", "Basic " + passwordencrpted);
            conn.setDoOutput(true);
            conn.setDoInput(true);

            String requestJson = "{\"name\":\"refs/heads/feature/TEST\",\"dryRun\":\"false\"}";
            DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
            wr.write(requestJson.getBytes());

            InputStream inputStream = conn.getInputStream();
            ByteArrayOutputStream result = new ByteArrayOutputStream();
            byte[] buffer = new byte[1024];
            int length;

            while ((length = inputStream.read(buffer)) != -1) {
                result.write(buffer, 0, length);
            }
            String jsonStr = result.toString(UTF_8);

            System.out.println(jsonStr);

            wr.flush();
            wr.close();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (ProtocolException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }