创建一个ArrayList对象,传入整型参数 @Test public void arrayListConstructor(){ ArrayList<Object> objects = new ArrayList<>(5); System.out.println(objects.size()); // 0 } 结果调用size方法,返回结果却是0. 难道是真的没生效吗? ArrayList对象的size()方法源码: /** * Returns the number of elem
In the last post we discussed about class ArrayList in Javaand it’s important methods. Here we are sharing multiple ways to initialize an ArrayList with examples. Method 1: Initialization using Arrays.asList Syntax: ArrayList<Type> obj = new ArrayLi