2)IsSynchronized属性和ArrayList.Synchronized方法 IsSynchronized属性指示当前的ArrayList实例是否支持线程同步,而ArrayList.Synchronized静态方法则会返回一个ArrayList的线程同步的封装。 如果使用非线程同步的实例,那么在多线程访问的时候,需要自己手动调用lock来保持线程同步,例如: ArrayList list = new ArrayList(); //.....
isEmpty() 判断arraylist 是否为空 subList() 截取部分 arraylist 的元素 set() 替换arraylist 中指定索引的元素 sort() 对arraylist 元素进行排序 toArray() 将arraylist 转换为数组 toString() 将arraylist 转换为字符串 ensureCapacity() 设置指定容量大小的 arraylist lastIndexOf() 返回指定元素在 arraylist 中最...
If the list is variable-size the programmer must additionally override the add(int, E) and remove(int) methods. The programmer should generally provide a void (no argument) and collection constructor, as per the recommendation in the Collection interface specification. Unlike the other abstract...
operations run in linear time (roughly speaking). The constant factor is low compared to that for the LinkedList implementation.* 所有其他的方法的时间复杂度都是线性的,* Each ArrayList instance has a capacity. The capacity is the size of the array used to store the elements in the list. It ...
ArrayDeque in Java provides a way to apply resizable-array in addition to the implementation of the Deque interface. It is also known as Array Double Ended Queu...
调用toArray() 函数会抛出“java.lang.ClassCastException”异常,但是调用 toArray(T[] contents) 能正常返回 T[]。 toArray() 会抛出异常是因为 toArray() 返回的是 Object[] 数组,将 Object[] 转换为其它类型(如如,将Object[]转换为的Integer[])则会抛出“java.lang.ClassCastException”异常,因为Java不...
给数组添加元素的方法(Adding elements to an array in Java) 在Java中,数组是一种常见的数据结构,用于存储一组相同类型的元素。有时候我们需要向数组中添加新的元素。本文将介绍几种常用的方法来给数组添加元素,并附带代码示例。 方法一:使用ArrayList类 ...
* as an array - so that any overload variant * can be traced in "one place". This example * traces any "readXX" method on any class in * java.io package. Probed class, method and arg * array is printed in the action. */@BTracepublicclassArgArray{@OnMethod( ...
JavaArray<T>.ICollection.IsSynchronized Property Reference Feedback Definition Namespace: Java.Interop Assembly: Java.Interop.dll C# 複製 bool System.Collections.ICollection.IsSynchronized { get; } Property Value Boolean Implements IsSynchroniz...
若是在这个静态变量初始化的过程当中出现了异常,那么就会抛出 java.lang.ExceptionInInitializerError异常。任何异常均可能会引起这种状况,好比说,java.lang.ArrayIndexOutOfBound或者java.lang.NullPointerException。Java开发人员一般会被这个错误弄晕,他以为本身并无定义任何的静态初始化块,为何还会抛出ExceptionIn...