Java ArrayList Vector-阿里云

Java进阶：【集合】1.8 jdk Arraylist和Vector集合源码分析 1.8 jdk Arraylist集合源码分析底层数组，size是有效数据的长度，在1.8中调用无参数构造器时底层的elementdata数组初始化为｛｝add方法在调用add方法后底层数组才重新赋值，为新的数组，长度为10，节省了内存，只有在需要添加的时候我们才要创建数组Vecto...

java ArrayList与Vector 本文基于JDK1.7 Vector与ArrayList Vector用同步实现了线程安全，ArrayList是线程不安全的，但是可以通过Collections.synchronizedList(list)来实现线程安全，不要求线程安全的场景用ArrayList效率更高 Vector与ArrayLis...

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