Option is a good thing that most people really don't know how to use!
OverviewNullPoInterException, ChInese name:Null poInter exceptionNPE, also known as NPE, is one of the most common error anomalies In software systems.Long ago, the Google Guava project IntroducedOptionalNull poInter exceptionNullTo expect programmers to write code that is both neat and more readable...
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Attention to those who pay with WeChat Pay! There is a big difference between 'I sweep you' and 'you sweep me'. Don't make any mistakes again
In the digital age, especially mobile payments such as WeChat have become commonly used payment methods in our daily lives. It has brought us a lot of convenience, but there are also some risks and hidden dangers...
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New low in history! How does a TV set that won't move for 200 yuan lose the hearts of consumers?
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Global climate change is out of control, domestic heatstroke products are selling crazily in Europe, American media: they still need to be made in China
One TalkEdit | One TalkPreface:The heat here is a bit crazyThis is the evaluation of European summer by a tourist from a tropical region.It can be seen that Europe has reached a new height of heat, and some experts say that,Europe has ushered in its highest temperature in 100000 years...
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In 1980, a Saudi Arabian flight successfully made a forced landing but no one disembarked. After rescue workers opened the door, all bodies were found
I believe many people have this experience. Compared to other means of transportation, there are many things that need to be paid special attention to when taking a plane...
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A war without smoke! The Huawei Apple controversy has never stopped! Why does Huawei's market value not match Apple's
In recent years, the market value gap between Huawei and Apple, two technology giants, has attracted widespread attention and discussion.As one of the world's largest telecommunications equipment manufacturers, Huawei has made significant progress in areas such as 5G technology, and its market value has also continued to rise...
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Not as skilled as humans? China spent 140 million US dollars on the moon, while India spent 75 million US dollars on Chandrayaan-3
India's "Chandrayaan-3" will be launched on July 14, and its online attention is very high, even higher than the success of the launch of the world's first liquid oxygen methane rocket "Suzaku 2".If successful, India will become another country to land on the moon after Russia (Soviet Union), the United States, and China...
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A New Breakthrough in the Construction of the High Resolution Earth Observation System Data and Application Center of Shandong Provincial Bureau of Geology and Mineral Resources
Overall planning, scientific layout, precise positioningA New Breakthrough in the Construction of the High Resolution Earth Observation System Data and Application Center of the Provincial Bureau of Geology and Mineral ResourcesUsing multi temporal remote sensing data to monitor the construction time of illegal buildings, providing a basis for urban construction law enforcement, and achieving early detection and prevention;Identify crop spectral reflectance features through remote sensing images, accurately calculate the planting area of crops in a specific area, and provide data support for guarding the red line of farmland protection and monitoring the distribution pattern of crop planting;Implement remote sensing monitoring of surface water bodies and drinking water source areas, dynamically control the trend of water quality indicators, and promptly identify prominent ecological and environmental issues in various surface water bodies and water source protection areas;This is a microcosm of the partial application of high-resolution Earth observation technology in serving the economic and social development of Shandong. As the main force of geological work in Shandong Province, the Shandong Provincial Bureau of Geology and Mineral Resources has completed most of the basic geological work in the province since its establishment in 1958, accumulating a complete range of geological data materials that cover the entire province, are dynamic and continuous, and are widely used...
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Urgent notice! Don't hang up when you receive this call
The 95120 National Telephone Traffic Control System has been officially launched in disease control institutions at all levels nationwide on June 26, 2023. The system has functions such as unified external call numbers, AI intelligent external calls, call reminders and hanging up SMS, and multi terminal applications...
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Netizen: Don't change it! WeChat: Rest assured
If WeChat messagesCan you support displaying 'read'?On the 12th, "If WeChat shows read" made it to the hot search.In the discussion, the vast majority of netizens expressed opposition to this...
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Create history! This university in Shandong won the second prize in the National Robot and Artificial Intelligence Competition
Reported by Sun Jie, a journalist from Volkswagen Network, from JinanRecently, the 25th China Robot and Artificial Intelligence Competition National Finals came to an end. The "cloud edge end" intelligent patrol data acquisition UAV system project from Information science and Technology College of Mount Taishan University won the second prize of the National Finals Innovation Group (Artificial Intelligence Innovation Competition), realizing a historic new breakthrough...
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There are as many as 6 phone chargers that do not meet the standards. Take a look at the ones you are using
Recently, the Consumer Association of Guizhou ProvinceWe have tested 20 mobile phone power adaptersComparative experimentResult display6 samples including Kuaishuang ZunkerNot meeting national standardsThe specific situation of the 6 substandard samples is:01The nominal "crazy flash" power adapter produced by Shenzhen Lingdu Technology Co., Ltd...
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