java - updateProgress(double,double) 在任务中具有 protected 访问权限

Question

我已经实现了自己的javafx.concurrent.Task，并且我想在其类声明之外调用其updateProgress方法，但错误提示:updateProgress(double,double)在任务中具有 protected 访问

示例:

downloadTask.updateProgress(index,size);

这可能吗？

Answer 1

Java文档: https://docs.oracle.com/javafx/2/api/javafx/concurrent/Task.html

来自 javadoc 的代码片段:

 public class IteratingTask extends Task<Integer> {
         private final int totalIterations;

         public IteratingTask(int totalIterations) {
             this.totalIterations = totalIterations;
         }

         @Override protected Integer call() throws Exception {
             int iterations = 0;
             for (iterations = 0; iterations < totalIterations; iterations++) {
                 if (isCancelled()) {
                     updateMessage("Cancelled");
                     break;
                 }
                 updateMessage("Iteration " + iterations);
                 updateProgress(iterations, totalIterations);
             }
             return iterations;
         }
     }