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ArrayList的自动扩容机制实现原理
2022-07-06 09:20:00 【快醒醒鸭今天你编程了吗？】
ArrayList是一个数组结构的存储容器，默认情况下数组长度是10个，也可以在创建ArrayList对象的时候指定初始长度随着在程序里面不断往ArrayList里面添加数据超过十个的时候，ArrayList中就没有足够的容量去存储后续的数据，这时候ArrayList会触发自动扩容机制，自动扩容机制流程是
- 首先创建一个新的数据这个数组的长度是原来数组长度的1.5倍
- 然后使用Arrays.copyOf方法把老数组里面的数据拷贝到新的数组里面
扩容完成以后再把当前需要添加的元素加入到新的数组里面，从而完成动态扩容这样一个过程
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