I try it with curl and it works but I don't know why it doesn't work on my workplace
curl -v https://login.salesforce.com/services/oauth2/token -d "grant_type=password&client_id={clientid}&client_secret={clientsecret}&username={emailadd}&password={password+securityToken}" -H "Content-Type:application/x-www-form-urlencoded"

I also try it in my own laptop and it works. That's what I don't understand. I used the same jar file for httpclient for both pc and in my laptop it works but not on my work place. Is there any other reason why it doesn't work this is the sample code


CloseableHttpAsyncClient client = HttpAsyncClients.createDefault();
    client.start();
    
    String authenticationUrl = "https://login.salesforce.com/services/oauth2/token";
    
    // authentication
    HttpPost requestPost = new HttpPost(authenticationUrl);
    requestPost.setHeader("Content-Type", "application/x-www-form-urlencoded");
    requestPost.setHeader("Accept", "application/json");
    
    List<NameValuePair> params = new ArrayList<>();
    params.add(new BasicNameValuePair("grant_type", "password"));
    params.add(new BasicNameValuePair("client_id", client_id));
    params.add(new BasicNameValuePair("client_secret", client_secret));
    params.add(new BasicNameValuePair("username", username));
    params.add(new BasicNameValuePair("password", password+securityToken));
    requestPost.setEntity(new UrlEncodedFormEntity(params));
    HttpResponse response = client.execute(requestPost, null).get();
    
    
    System.out.println("Status code:" + response.getStatusLine().getStatusCode());
    System.out.println("Entity: " + response.getEntity().getContent().toString());
    
    HttpEntity entity = response.getEntity();
    String responseString = EntityUtils.toString(entity, "UTF-8");
    System.out.println(responseString);