modCount++;// overflow-conscious codeif(minCapacity - elementData.length >0)// 扩容grow(minCapacity); }/** 扩容的核心方法 */privatevoidgrow(intminCapacity){// overflow-conscious codeintoldCapacity=elementData.length;// 新容量为旧容量的1.5倍// newCapacity = oldCapacity + oldCapacity / 2 = ...
\Program Files\Java\jdk-13.0.2\bin\java.exe" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2019.2\lib\idea_rt.jar=63549:C:\Program Files\JetBrains\IntelliJ IDEA 2019.2\bin" -Dfile.encoding=UTF-8 -classpath C:\java\JavaApps\out\production\JavaApps day07.demo04.Demo03ArrayListMethod...
一般地,只要实现了Serializable接口即可自动序列化,writeObject()和readObject()是为了自己控制序列化的方式,这两个方法必须声明为private,在java.io.ObjectStreamClass#getPrivateMethod()方法中通过反射获取到writeObject()这个方法。 在ArrayList的writeObject()方法中先调用了s.defaultWriteObject()方法,这个方法是写入非sta...
Java SE 17 & JDK 17 Overview Module Package Class Use Tree Preview New Deprecated Index Help Summary: Nested | Field | Constr | Method Detail: Field | Constr | Method SEARCH: Module java.base Package java.util Class ArrayList<E>java...
Locate the method to find the last element section 使用代码实现 Implement the solution using code 2. 步骤及代码解释 在教会小白同学如何实现Java ArrayList获取最后一个元素之前,我们首先要确保他对ArrayList有一定的了解。ArrayList是Java中的一个动态数组,它可以根据需要自动增长。
(a specialized variant appears in method forEach) ArrayList<E> lst; if ((hi = fence) < 0) { if ((lst = list) == null) hi = fence = 0; else { expectedModCount = lst.modCount; hi = fence = lst.size; } } return hi; } // 分割ArrayList,每调用一次,将原来的迭代器等分为两...
import java.util.ArrayList; import java.util.List; /** * A Java program to explain the retainAll() method of the ArrayList class. * * @author coderolls.com * */ public class ArrayListRetainAllExample { public static void main(String[] args) { //create an empty ArrayList of Integer to...
/* * Private remove method that skips bounds checking and does not * return the value removed. */ private void fastRemove(int index) { modCount++; int numMoved = size - index - 1; if (numMoved > 0) System.arraycopy(elementData, index+1, elementData, index, numMoved); elementData[...
int hi; // (a specialized variant appears in method forEach) ArrayList<E> lst; if ((hi = fence) < 0) { if ((lst = list) == null) hi = fence = 0; else { expectedModCount = lst.modCount; hi = fence = lst.size;
This is typically accomplished by*synchronizing on some object that naturally encapsulates the list.*If no such object exists,the list should be"wrapped"using the*{@link Collections#synchronizedList Collections.synchronizedList}*method.This is best done at creation time,to prevent accidental*...