//若预设值大于默认的最大值检查是否溢出 if (newCapacity - MAX_ARRAY_SIZE > 0) newCapacity = hugeCapacity(minCapacity); // 调用Arrays.copyOf方法将elementData数组指向新的内存空间newCapacity的连续空间 // 并将elementData的数据复制到新的内存空间 elementDat
AI代码解释 privatevoidgrow(intminCapacity){// overflow-conscious codeintoldCapacity=elementData.length;intnewCapacity=oldCapacity+(oldCapacity>>1);if(newCapacity-minCapacity<0)newCapacity=minCapacity;if(newCapacity-MAX_ARRAY_SIZE>0)newCapacity=hugeCapacity(minCapacity);// 将原数组元素拷贝到新数组eleme...
2. Max Size A Java program can only allocate an array up to a certain size. It generally depends on the JVM that we’re using and the platform. Since the index of the array isint, theapproximate index value can be 2^31 – 1. Based on this approximation, we can say that the array...
privatevoidgrow(intminCapacity){intoldCapacity=elementData.length;intnewCapacity=oldCapacity+(oldCapacity>>1);if(newCapacity-minCapacity<0)newCapacity=minCapacity;if(newCapacity-MAX_ARRAY_SIZE>0)newCapacity=hugeCapacity(minCapacity);// 将原数组复制到新数组elementData=Arrays.copyOf(elementData,newCapacity...
int[] array =newint[3]; intarray [] =newint[3]; int[] array = {1,2,3}; int[] array =newint[]{1,2,3}; 而ArrayList的底层是通过动态数组实现,长度动态可变,会自动扩容。不使用泛型的时候,可以添加不同类型元素。 【代码示例2】
* OutOfMemoryError: Requested array size exceeds VM limit */privatestaticfinalintMAX_ARRAY_SIZE=Integer.MAX_VALUE -8; 这里说 Some VMs reserve some header words in an array. 即有些虚拟机会在数组中保存 header words 头部字。 对象头可以看这里: ...
* OutOfMemoryError: Requested array size exceeds VM limit */privatestaticfinalintMAX_ARRAY_SIZE=Integer.MAX_VALUE-8; 这里说 Some VMs reserve some header words in an array. 即有些虚拟机会在数组中保存 header words 头部字。 对象头可以看这里: ...
下标的合法区间:[0, length-1],如果越界就会报错 ArrayIndexOutOfBoundsException (数组下标越界异常) 代码举例 public class ArrayDemo02 { public static void main(String[] args) { //静态初始化:创建的同时赋值 int[] a = {1, 2, 3, 4, 5, 6, 7, 8}; for (int i = 0; i < a.length;...
java.lang.OutOfMemoryError: Requested array size exceeds VM limit在以下 2 种情况下会出现: 你的数组增长的太大, 最终大小位于平台的限制和Integer.MAX_INT之间 您特意尝试分配大于 2 ^ 31-1 元素的数组来试验该限制。 在第一种情况下, 检查您的代码库, 看看您是否真的需要这么大的数组。也许你可以减少...
if (newCapacity - MAX_ARRAY_SIZE > 0) newCapacity = hugeCapacity(minCapacity); // minCapacity is usually close to size, so this is a win: elementData = Arrays.copyOf(elementData, newCapacity); } 1. 2. 3. 4. 5. 6. 7. 8. ...