publicintsize();//返回栈中元素个数 } classArrayIntegerStackimplementsIntegerStack{ intsize; inttag=-1;//指向数组中的最后一个元素 Integer[]array; ArrayIntegerStack(intsize){ this.size=size; array=newInteger[size]; } publicIntegerpush(Integeritem){ if(item==null){ returnnull; } if(this.ta...
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...
* The cache is initialized on first usage. The size of the cache * may be controlled by the {@code -XX:AutoBoxCacheMax=<size>} option. * During VM initialization, java.lang.Integer.IntegerCache.high property * may be set and saved in the private system properties in the * sun.misc.V...
// int 最大值为 2^31-1publicstaticfinal Class<Integer>TYPE=(Class<Integer>)Class.getPrimitiveClass("int");// 基本类型 int 包装类的实例publicstaticfinal intSIZE=32;// 以二进制补码形式表示 int 值所需的比特数publicstaticfinal intBYTES=SIZE/Byte.SIZE;// 以二进制补码形式表示 int 值所需的...
// Maximum array size is Integer.MAX_VALUE h = Math.min(i, Integer.MAX_VALUE - (-low) -1); } catch( NumberFormatException nfe) { // If the property cannot be parsed into an int, ignore it. } } high = h; cache = new Integer[(high - low) + 1]; ...
// Maximum array size is Integer.MAX_VALUE h = Math.min(i, Integer.MAX_VALUE - (-low) -1); } catch( NumberFormatException nfe) { // If the property cannot be parsed into an int, ignore it. } } high = h; cache = new Integer[(high - low) + 1]; ...
i = Math.max(i,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; ...
NegativeArraySizeException(負數數組大小例外) NoClassDefFoundError 找不到欄位錯誤 (NoSuchFieldError) NoSuchFieldException NoSuchMethodError(沒有此方法錯誤) NoSuchMethodException NullPointerException (空指針例外) 數字 數字格式異常(NumberFormatException) 物件 OutOfMemoryError 覆蓋 OverrideAttribute 包裹 過程 ProcessBuil...
// Maximum array size is Integer.MAX_VALUE h = Math.min(i, Integer.MAX_VALUE - (-low) -1); } catch( NumberFormatException nfe) { // If the property cannot be parsed into an int, ignore it. } } high = h; cache = new Integer[(high - low) + 1]; ...
通过源码可知: IntegerCache的最小值low为-128,IntegerCache的最大值high默认为127;通过注释可知high可以通过启动应用程序时加上 -XX:AutoBoxCacheMax=<size> 选项来指定high的值.所以这就说明了对于Integer类型的会员卡id使用==进行比较时项目上线没有出现问题,运行一段时间之后才出现问题是因为新增的会员卡id还没超...