把下面强化for循环改成for循环:for (String str : list) { writer.write(str); writer.write("\n"); }
时间: 2024-02-14 10:08:01 浏览: 18
将强化for循环改成for循环可以这样写:
```java
for (int i = 0; i < list.size(); i++) {
String str = list.get(i);
writer.write(str);
writer.write("\n");
}
```
在for循环中,我们使用`list.size()`获取`LinkedList`集合的大小,然后使用`list.get(i)`获取集合中对应位置的元素,再将元素写入到`txt`文本中。
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代码解释# Process detections for i, det in enumerate(pred): # detections per image if webcam: # batch_size >= 1 p, s, im0 = path[i], '%g: ' % i, im0s[i].copy() else: p, s, im0 = path, '', im0s save_path = str(Path(out) / Path(p).name) s += '%gx%g ' % img.shape[2:] # print string gn = torch.tensor(im0.shape)[[1, 0, 1, 0]] # normalization gain whwh if det is not None and len(det): # Rescale boxes from img_size to im0 size det[:, :4] = scale_coords(img.shape[2:], det[:, :4], im0.shape).round() # Print results for c in det[:, -1].unique(): n = (det[:, -1] == c).sum() # detections per class s += '%g %ss, ' % (n, names[int(c)]) # add to string # Write results for *xyxy, conf, cls in det: if save_txt: # Write to file xywh = (xyxy2xywh(torch.tensor(xyxy).view(1, 4)) / gn).view(-1).tolist() # normalized xywh with open(save_path[:save_path.rfind('.')] + '.txt', 'a') as file: file.write(('%g ' * 5 + '\n') % (cls, *xywh)) # label format if save_img or view_img: # Add bbox to image label = '%s %.2f' % (names[int(cls)], conf) if label is not None: if (label.split())[0] == 'person': people_coords.append(xyxy) # plot_one_box(xyxy, im0, line_thickness=3) plot_dots_on_people(xyxy, im0) # Plot lines connecting people distancing(people_coords, im0, dist_thres_lim=(100, 150)) # Print time (inference + NMS) print('%sDone. (%.3fs)' % (s, t2 - t1)) # Stream results if 1: ui.showimg(im0) if cv2.waitKey(1) == ord('q'): # q to quit raise StopIteration # Save results (image with detections) if save_img: if dataset.mode == 'images': cv2.imwrite(save_path, im0) else: if vid_path != save_path: # new video vid_path = save_path if isinstance(vid_writer, cv2.VideoWriter): vid_writer.release() # release previous video writer fps = vid_cap.get(cv2.CAP_PROP_FPS) w = int(vid_cap.get(cv2.CAP_PROP_FRAME_WIDTH)) h = int(vid_cap.get(cv2.CAP_PROP_FRAME_HEIGHT)) vid_writer = cv2.VideoWriter(save_path, cv2.VideoWriter_fourcc(*opt.fourcc), fps, (w, h)) vid_writer.write(im0)
这段代码是目标检测算法的输出结果处理部分。主要包括以下几个步骤:
1. 对每张图片的检测结果进行处理,包括将检测框从输入图像的尺寸缩放到输出图像的尺寸,并将结果写入文本文件中。
2. 对每个类别的检测结果统计数量,并将数量和类别名称添加到输出字符串中。
3. 对每个检测到的目标绘制边界框,并在边界框上标注类别和置信度。
4. 如果检测到的目标是人,则将其坐标保存在列表中,并在图像上绘制点和连线进行社交距离监测。
5. 将处理后的图像展示出来,并将图像保存到文件中。
java项目把list数据写入txt文件
你可以使用 Java 的 BufferedWriter 和 FileWriter 类来将 List 中的数据写入到 txt 文件中。下面是一个示例代码:
```java
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.List;
public class WriteListToFile {
public static void writeListToFile(List<String> list, String fileName) {
try (BufferedWriter writer = new BufferedWriter(new FileWriter(fileName))) {
for (String str : list) {
writer.write(str);
writer.newLine();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
```
在这个示例代码中,我们首先创建了一个 BufferedWriter 对象,然后通过 FileWriter 类将其与指定的文件关联起来。接着,我们遍历 List 中的每个元素,将其写入到文件中,并在每个元素后面添加一个换行符,以保证每个元素都单独占据一行。最后,我们使用 try-with-resources 语句来确保 BufferedWriter 对象被正确关闭,从而避免资源泄漏。