5*6* The cache is initialized on first usage. The size of the cache7* may be controlled by the {@code-XX:AutoBoxCacheMax=} option.8* During VM initialization, java.lang.Integer.IntegerCache.high property9* may be set and saved in the private system properties in the10* sun.misc.VM ...
* The cache is initialized on first usage. The size of the cache * may be controlled by the {@code -XX:AutoBoxCacheMax=} option. * During VM initialization, java.lang.Integer.IntegerCache.high property * may be set and saved in the private system properties in the * sun.misc.VM class...
* The cache is initialized on first usage. The size of the cache * may be controlled by the {@code -XX:AutoBoxCacheMax=} option. * During VM initialization, java.lang.Integer.IntegerCache.high property * may be set and saved in the private system properties in the * sun.misc.VM class...
This method will always cache values in the range -128 to 127, inclusive, and may cache other values outside of this range. Parameters: i - an int value. Returns: an Integer instance representing i. Since: 1.5 byteValue public byte byteValue() Returns the value of this Integer as a ...
Integer 缓存池(Integer Cache)是 JDK 内部维护的一个静态缓存,用于存储一定范围内的 Integer 对象。当我们获取这个范围内的 Integer 对象时,Java 会直接返回缓存池中已有的对象,而不是创建新的实例,从而提高内存使用效率和程序性能。 Integer 缓存池本质是"享元模式(Flyweight Pattern)"的应用——通过共享细粒度对象...
static final Integer[] cache; static Integer[] archivedCache; static { // high value may be configured by property int h = 127; String integerCacheHighPropValue = VM.getSavedProperty("java.lang.Integer.IntegerCache.high"); if (integerCacheHighPropValue != null) { ...
static final Integer cache[]; static { // high value may be configured by property int h = 127; //获得配置的缓存区间最大值 String integerCacheHighPropValue = sun.misc.VM.getSavedProperty("java.lang.Integer.IntegerCache.high"); if (integerCacheHighPropValue != null) { ...
此方法是获取 VM参数中的AutoBoxCacheMax的值 public class IntegerCacheExample { public static void main(String[] args) { System.out.printf("high:%s.\n", sun.misc.VM.getSavedProperty("java.lang.Integer.IntegerCache.high")); Integer a = 127; Integer b = 127; System.out.printf("a==b: ...
* During VM initialization, java.lang.Integer.IntegerCache.high property * may be set and saved in the private system properties in the * sun.misc.VM class. */ private static class IntegerCache { static final int low = -128; static final int high; static final Integer cache[]; static ...
int low = -128;static final int high;//初始化的时候没有直接赋值static final Integer cache[];static {// high value may be configured by propertyint h = 127;//附默认值为127，同时可以通过下⽅代码从配置⽂件中进⾏读取String integerCacheHighPropValue =sun.misc.VM.getSavedProperty("java....