此方法不检查索引是否为负数,它只检查索引是否大于或等于数组的长度。 Javadoc解释了原因:如果索引是负数,则数组访问会抛出ArrayIndexOutOfBoundsException。 privatevoidrangeCheck(intindex) {if(index >=size)thrownewIndexOutOfBoundsException(outOfBoundsMsg(index)); }publicE get(intindex) { rangeCheck(index)...
此方法不检查索引是否为负数,它只检查索引是否大于或等于数组的长度。 Javadoc解释了原因:如果索引是负数,则数组访问会抛出ArrayIndexOutOfBoundsException。 privatevoidrangeCheck(intindex) {if(index >=size)thrownewIndexOutOfBoundsException(outOfBoundsMsg(index)); }publicE get(intindex) { rangeCheck(index)...
EachArrayListinstance has acapacity. The capacity is the size of the array used to store the elements in the list. It is always at least as large as the list size. As elements are added to an ArrayList, its capacity grows automatically. The details of the growth policy are not specified...
Exception in thread “Thread-0” java.util.ConcurrentModificationException at java.util.AbstractList… 结论: 上面的例子在多线程情况下,使用单线程的第1种解决方案iterator.remove()进行删除依然出现异常ConcurrentModificationException,测试得知使用单线程的第2种解决方案也会出现同样的问题。 接着来再看一下JavaDoc...
/* (non-Javadoc) *向ArrayList中添加元素 * @see java.util.AbstractList#add(java.lang.Object) */ publicbooleanadd(E e){ ensureCapacity(size+1); elementData[size++] = e; returntrue; } 2、add(int index ,E e) 向集合的指定索引处添加元素 ...
并因此使用: final String json = ""; Set<POJO> properties = fromJSON(new TypeReference<Set<POJO>>() {}, json); 类型参考 Javadoc 原文由 Perception 发布,翻译遵循 CC BY-SA 4.0 许可协议 有用 回复 查看全部 2 个回答 推荐问题 Spring中的两个疑惑? 使用注解的写法是否违背了Spring诞生的初衷?看...
System.out.println("Created in total: "+counter+" items"); } 发布于 9 天前 BlockingQueue 我建议使用BlockingQueue接口的实现,而不是ArrayList。BlockingQueue就是thread-safe。 引用Javadoc: BlockingQueue实现是thread-safe。所有排队方法都是通过使用内部锁或其他形式的并发控制来实现其原子效果的。但是,除非在...
问普林斯顿算法书中带有ArrayList的随机队列EN在这本书中，他们建议使用数组，但我认为使用ArrayList更容易...
(Constructor and method descriptions borrowed from Sun javadoc pages) 9/2011 9ArrayList Methods ,Method Summary(incomplete) , void add(int index,Object element) , Inserts the specified element at the specified position in this l ist. , boolean add(Object o) ...
As per theVector javadocthe Enumeration returned by Vector is not fail-fast. On the other side the iterator and listIterator returned by ArrayList are fail-fast. 5)Who belongs to collection framework really?The vector was not the part of collection framework, it has been included in collections...