The parameter groupName cannot be used with the parameter subnet AWS SDK

I am trying to create a spot instance using AWS SDK, but I am facing a problem while using security group names and subnets. The error that I get while I try to give security groups and subnet id in the launch specification is:

The parameter groupName cannot be used with the parameter subnet 

I have tried a number of resources online and have tried different ways to solve the situation, however I have been unable to resolve the problem. In some of the solutions I see that people suggest using setGroupID or withAllGroupNames function but neither of them works, the former is not even present in the AWS SDK, the only functions available are set/withGroupNames or set/withAllGroupNames. If anyone has a solution, I would be highly obliged if they can show me a work around for this problem.

Thanks.

Here is my code:

RequestSpotInstancesRequest requestRequest = new RequestSpotInstancesRequest();
        // Request 1 x m3.medium instance with a bid price of $0.009.
        requestRequest.setSpotPrice("0.009");
        requestRequest.setInstanceCount(Integer.valueOf(1));
        // Setup the specifications of the launch. This includes the
        // instance type (e.g. m3.medium) and the latest Amazon Linux
        // AMI id available. Note, you should always use the latest
        // Amazon Linux AMI id or another of your choosing.
        LaunchSpecification launchSpecification = new LaunchSpecification();
        launchSpecification.setImageId("ami-4c4e0f24");
        launchSpecification.setInstanceType("m3.medium");

        CreateSecurityGroupRequest csgr = new CreateSecurityGroupRequest();

        csgr.withGroupName("loadGeneratorS_G2").withDescription("Security group load generator");



        CreateSecurityGroupResult createSecurityGroupResult = 
                ec2.createSecurityGroup(csgr);

        IpPermission ipPermission = new IpPermission();
        ipPermission.setIpProtocol("tcp");
        ipPermission.setFromPort(80);
        ipPermission.setToPort(80);

        AuthorizeSecurityGroupIngressRequest authorizeSecurityGroupIngressRequest =
                new AuthorizeSecurityGroupIngressRequest();

        authorizeSecurityGroupIngressRequest.withGroupId(createSecurityGroupResult.getGroupId())
        .withIpPermissions(ipPermission);

        ec2.authorizeSecurityGroupIngress(authorizeSecurityGroupIngressRequest);

        //Create Instance Request
        RunInstancesRequest runInstancesRequest = new RunInstancesRequest();
        //Add the security group to the request.

    launchSpecification.setSubnetId(createSecurityGroupResult.getGroupId());
    launchSpecification.withSubnetId("subnet-8071a1ab");


        // Add the launch specifications to the request.
        requestRequest.setLaunchSpecification(launchSpecification);

        //Launch Instance
        RequestSpotInstancesResult requestResult = ec2.requestSpotInstances(requestRequest);