目录1. 底层数据结构1.1. ArrayList的特性1.2. 如何设计的数据结构2. 元素插入（增）2.1. 在数组末尾插入2.2. 指定索引下标插入2.3. ensureCapacityInternal 与 grow 扩容流程2.4. 扩容时才对modCount 自增合理吗？2
I have a rectangle of any arbitrary width and height. I 开发者_JAVA技巧know X,Y, width, and height. How do I solve the upper right hand coordinates when the rectangle is rotated N degrees? I realized
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