public class SNSConfig {

    public AmazonSNS sendMsg(){

    AWSSecurityTokenServiceClient stsClient =    new AWSSecurityTokenServiceClient(new ProfileCredentialsProvider());
    GetSessionTokenRequest getSessionTokenRequest = new GetSessionTokenRequest();
    getSessionTokenRequest.setDurationSeconds(7200);
     GetSessionTokenResult sessionTokenResult =   stsClient.getSessionToken(getSessionTokenRequest);
     Credentials sessionCredentials = sessionTokenResult.getCredentials();
     BasicSessionCredentials basicSessionCredentials =
             new BasicSessionCredentials(sessionCredentials.getAccessKeyId(),
                                   sessionCredentials.getSecretAccessKey(),
                                    sessionCredentials.getSessionToken());
     AmazonSNS snsClient=AmazonSNSClient
                            .builder()
                            .withRegion(Regions.DEFAULT_REGION)
                            .withCredentials(new AWSStaticCredentialsProvider(basicSessionCredentials))
                            .build();


            return snsClient;
}
}

method that calls calls to send sns text:
    SNSConfig c = new SNSConfig();


    public void setUpSNS(String location){
            String msg="Customer has arrived in the "+location;
            String advNumber="+1210XXXXXXX";

            try{

                    AmazonSNS sns=c.sendMsg();
                    PublishResult result=sns.publish(new PublishRequest()
                                .withMessage(msg)
                        System.out.println("result:"+result);
                }catch(Exception e){
                    e.printStackTrace();
                }


    }