public HttpHealthCheckService(HealthChecker... healthCheckers){
  this.healthCheckers=Collections.unmodifiableList(Arrays.asList(healthCheckers));
  serverHealth=new SettableHealthChecker();
  serverHealthUpdater=new ServerHealthUpdater();
}

public HttpHealthCheckService ( HealthChecker ... healthCheckers ) { this . healthCheckers = Collections . unmodifiableList ( Arrays . asList ( healthCheckers ) ) ; serverHealth = new SettableHealthChecker ( ) ; serverHealthUpdater = new ServerHealthUpdater ( ) ; }
creates a new instance .
