Почему в Java интерфейс может иметь методы с реализацией (default)? Это не противоречит идее интерфейса?
Ответ:
Без default при добавлении нового метода пришлось бы менять весь существующий код. С default-методом интерфейс даёт базовую реализацию метода, которую необязательно переопределять в реализующих классах.
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BY Java Developer
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The SSE was the first modern stock exchange to open in China, with trading commencing in 1990. It has now grown to become the largest stock exchange in Asia and the third-largest in the world by market capitalization, which stood at RMB 50.6 trillion (US$7.8 trillion) as of September 2021. Stocks (both A-shares and B-shares), bonds, funds, and derivatives are traded on the exchange. The SEE has two trading boards, the Main Board and the Science and Technology Innovation Board, the latter more commonly known as the STAR Market. The Main Board mainly hosts large, well-established Chinese companies and lists both A-shares and B-shares.
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