public void setFileSystemId(String fileSystemId) {
        this.fileSystemId = fileSystemId;
    }
<p>
Specifies the file system with which you want to associate one or more DNS aliases.
</p>

@param fileSystemId
       Specifies the file system with which you want to associate one or more DNS aliases.
aws-java-sdk-fsx/src/main/java/com/amazonaws/services/fsx/model/AssociateFileSystemAliasesRequest.java