uts里怎样写类的class对象

let uploadWorkRequest: WorkRequest = new OneTimeWorkRequest.Builder(DelayWorker.class)  
                        .setInitialDelay(10, TimeUnit.MINUTES)  
                        .build();

这里面class是一个DelayWorker的父类的对象，不是DelayWorker的对象，而且DelayWorker对象参数太多，根本不可能用DelayWorker().javaClass传，有什么办法传入类的class对象吗？

//这是转换的kt代码  
val uploadWorkRequest: WorkRequest = OneTimeWorkRequest.Builder(UploadWorker::class.java)  
                .setInitialDelay(10, TimeUnit.MINUTES)  
                .build()