String nextToken = null;
do{
    ListEndpointsByPlatformApplicationRequest request = new ListEndpointsByPlatformApplicationRequest();
        request.setPlatformApplicationArn(applicationArn);
        request.setNextToken(nextToken);

        ListEndpointsByPlatformApplicationResult result =  sns.listEndpointsByPlatformApplication(request);
        List<Endpoint> endpoints = result.getEndpoints();
        for(Endpoint endPoint : endpoints){
            System.out.println(endPoint.getEndpointArn());
        }
        nextToken = request.getNextToken();
}while(nextToken != null);