为什么要有hasArray()？

直接贴StackOverflow https://stackoverflow.com/questions/55442531/why-do-we-ever-need-hasarray-method-in-charbuffer 正文： The condition for hasArray is (hb != null) && !isReadOnly isReadOnly changes if you use asReadOnlyBuffer CharBuffer.allocate(20).asReadOnlyBuffer(); for example.So yes, we need it. Take this line final CharBuffer cb = instanc..