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我根据文档中的示例尝试创建一个无默认值的list 83d755a6-0745-4d8b-8a10-d170e21c249c-image.png 但是IDEA报错，我应该如何解决这个问题 0bdbdd11-e83a-43ac-a81f-e3c7eddc7a3c-image.png
萌新求助