惊了，JDK都到23了，据说还有99%uava程序员都不会用optional？今天来说说optional的用法
TIP! Right-click and select "Save link as..." to download.
| VIDEOS | |||
| MP4 | N/A | 480P | Download |
| MP4 | N/A | 480P | Download |
| MP4 | N/A | 480P | Download |
| MP4 | N/A | 360P | Download |
| MP4 | N/A | 360P | Download |
| MP4 | N/A | 360P | Download |
| AUDIO | |||
| MP4 | N/A | mp4a.40.2 | Download |
| MP4 | N/A | mp4a.40.5 | Download |
| MP4 | N/A | mp4a.40.2 | Download |
| THUMBNAILS | |||
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JPEG | Origin Image | Download |
喜欢UP主发的视频记得一键3连支持一波噢，记得关注我！你的支持，是我最大的动力！
视频配套笔记、简历模板、面经都在这了：https://t.bilibili.com/934622073784893497?tab=2
视频配套笔记、简历模板、面经都在这了：https://t.bilibili.com/934622073784893497?tab=2
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