Azure Devops Java HttpsURLConnection authorization - azure-devops

Question

HttpsURLConnection problem, getting a 401 error when running an ADO API to create a new work item. It works from curl command line, but not in Java.
I have tried various suggestions and alternatives I have found, but so far no luck. I am using a PAT generated from ADO for password, so not sure if that is related to the problem. I tried revoking the PAT and regenerate, but it did not help. Can someone tell me what I am doing wrong here?
This works:
curl -u me:mypassword -x myproxy.corp:80 \
'https://dev.azure.com/mycompany/_apis/wit/workitems/$Bug?api-version=6.0' \
-H 'Content-Type: application/json-patch+json' \
--data-binary '[{"op":"add","path":"/fields/System.Title","value":"Test API"}]'
But this does not work. It gets a 401 error:
public static void createIncident() {
String input = "[{\"op\":\"add\",\"path\":\"/fields/System.Title\",\"value\":\"Test API\"}]";
String userpass="me:mypassword";
String basicAuth = "Basic :" + new String(Base64.getEncoder().encode(userpass.getBytes()));
Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("myproxy.corp", 80));
try {
URL url = new URL("https://dev.azure.com/mycompany/_apis/wit/workitems/$Bug?api-version=6.0");
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection(proxy);
conn.setRequestProperty("Authorization", basicAuth);
conn.setRequestProperty("Accept", "application/json-patch+json");
conn.setRequestProperty("Content-Type", "application/json-patch+json");
conn.setDoOutput(true);
conn.setRequestMethod("POST");
OutputStream os = conn.getOutputStream();
os.write(input.getBytes());
os.flush();
if (conn.getResponseCode() != HttpsURLConnection.HTTP_CREATED) {
throw new RuntimeException("Failed : HTTP error code : " + conn.getResponseCode());
}
conn.disconnect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}