}privatestaticintcalculateCapacity(Object[] elementData,intminCapacity){// 当第一次调用add(E e)方法的时候,判读是不是无参构造函数创建的对象,如果是,// 将DEFAULT_CAPACITY即10作为ArrayList的容量,此时minCapacity = 1if(elementData == DEFAULTCAPACITY_EMPTY_ELEMENTDATA) {returnMath.max(DEFAULT_CAPACITY, ...
StringUtils.isEmpty(cs); } /** * <p>Checks if any one of the CharSe...
它使用FastList替代ArrayList,通过初始化的默认值,减少了越界检查的操作; 优化并精简了字节码,通过使用Javassist,减少了动态代理的性能损耗,比如使用invokestatic指令代替invokevirtual指令; 实现了无锁的ConcurrentBag,减少了并发场景下的锁竞争。 HikariCP 对性能的一些优化操作,是非常值得我们借鉴的,在之后的博客中,我们将...
}publicArrayList(Collection<?extendsE>c) { elementData=c.toArray(); size=elementData.length;//c.toArray might (incorrectly) not return Object[] (see 6260652)//这里实际上也相当于new了一个空数组 当c.toArray() 为空数组时copy了一份空数组if(elementData.getClass() != Object[].class) elementD...
Control size of Excel window openned with PoweShell? Conversion error when inserting into a SQL Server table Convert a perl script to use in powershell instead Convert a string to a PSObject Convert array to string Convert Arraylist to delimited string Convert C# code in to PowerShell Script ...
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Typically I have an ArrayList of some class that I've created with specific fields, and then in my model class I have something like: public Object getValueAt(int row, int col) { Whatever w=list.get(row); if (col==0) return w.foo; else if (col==1) return w.bar...
public static Runnable defend(MultiplayerGame activeGame, String testFile, User defender, ArrayList<String> messages, Logger logger) { return new Runnable() { @Inject private GameManagingUtils gameManagingUtils; @Inject private IMutationTester mutationTester; @Override public void run() { try { //...
// While this may not be part of the regular factory bootstrap, it does otherwise work fine. List<String>beanNames=newArrayList<>(this.beanDefinitionNames); // Trigger initialization of all non-lazy singleton beans... for(StringbeanName:beanNames) { ...
public void preInstantiateSingletons() throws BeansException { List<String> beanNames = new ArrayList<>(this.beanDefinitionNames); /*触发初始化所有非懒加载bean*/ for (String beanName : beanNames) { RootBeanDefinition bd = getMergedLocalBeanDefinition(beanName); if (!bd.isAbstract() && bd....