因为 数组容量使用int类型数据进行标识, 所以我们认为数组容量MAX是 Integer.MAX_VALUE, 但是在编译器中定义运行,报错说OutOfMemoryError即内存不够。 因为JVM 需要为数组的元数据(描述数组属性-长度等)预留空间。 *//** * The maximum size of array to allocate. * Some VMs reserve some header words in an...
(integerCacheHighPropValue != null) { int i = parseInt(integerCacheHighPropValue); i = Math.max(i, 127); // Maximum array size is Integer.MAX_VALUE h = Math.min(i, Integer.MAX_VALUE - (-low)); } high = h; cache = new Integer[(high - low) + 1]; int j = low; for(int...
@Native public static final int MIN_VALUE = 0x80000000; 一个常数,持有了int类型数的最大值,2^31次方,2147483648,正21亿多 /** * A constant holding the maximum value an {@code int} can * have, 231-1. */ @Native public static final int MAX_VALUE = 0x7fffffff; 解释: 1、0x80000000 ...
127);// Maximum array size is Integer.MAX_VALUEh = Math.min(i, Integer.MAX_VALUE - (-low) -1);} catch( NumberFormatException nfe) {// If the property cannot be parsed into an int, ignore it.}}high = h;//配置⽂件中有值，并且满⾜上⽅条件对⽐及可更改high值cache = new I...
Java JDK 1.8.0 build25的valueOf(int i)源码如下, /** * Returns an {@code Integer} instance representing the specified * {@code int} value. If a new {@code Integer} instance is not * required, this method should generally be used in preference to ...
VM.getSavedProperty("java.lang.Integer.IntegerCache.high"); if (integerCacheHighPropValue != null) { try { h = Integer.parseInt(integerCacheHighPropValue); h = Math.max(h, 127); // 确保上限不低于默认值127 // Maximum array size is Integer.MAX_VALUE ...
(integerCacheHighPropValue != null) { try { int i = parseInt(integerCacheHighPropValue); i = Math.max(i, 127); // Maximum array size is Integer.MAX_VALUE h = Math.min(i, Integer.MAX_VALUE - (-low) -1); } catch( NumberFormatException nfe) { // If the property cannot be ...
MAX_VALUE A constant holding the maximum value an int can have, 231-1. static int MIN_VALUE A constant holding the minimum value an int can have, -231. static int SIZE The number of bits used to represent an int value in two's complement binary form. static Class<Integer> TYPE ...
Java.Lang Assembly: Mono.Android.dll A constant holding the maximum value anintcan have, 231-1. C# [Android.Runtime.Register("MAX_VALUE")]publicconstintMaxValue =2147483647; Field Value Value = 2147483647 Int32 Attributes RegisterAttribute...
Integer只有一个非静态字段value,用来表示其包装的int值。0x80000000和0x7fffffff分别是 int 最小值和最大值的十六进制表示,这里要注意十六进制 int 值在内存中的表示方法,有兴趣的同学可以了解一下,这里先占个坑,有时间单独写[一篇文章]()。 我们都知道int是 4 字节,32 比特,和 C/C++ 不同的时,Java中整型...