cache[k] = new Integer(j++); // range [-128, 127] must be interned (JLS7 5.1.7) assert Integer.IntegerCache.high >= 127; } private IntegerCache() {} } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. ...
' The valid range of an Integer variable is -2147483648 through +2147483647. Dim k As Integer ' The following statement causes an error because the value is too large. k = 2147483648 ' The following statement sets k to 6. k = CInt(5.9) ...
' The valid range of an Integer variable is -2147483648 through +2147483647.DimkAsInteger' The following statement causes an error because the value is too large.k =2147483648' The following statement sets k to 6.k =5.9' The following statement sets k to 4k =4.5' The following statement se...
this method should generally be used in preference to the constructor Integer(int), as this method is likely to yield significantly better space and time performance by caching frequently requested values. This method will always cache values in the range -128 to 127, inclusive...
我们都知道int是 4 字节,32 比特,和 C/C++ 不同的时,Java中整型的取值范围和运行 Java 代码的机器是无关的。无论是 16 位系统,32 位系统,还是 64 位系统,int永远都是 4字节。这也体现了 Java 的 “一次编写,到处运行”。 构造函数 Integer有两个构造函数。第一个如下所示: ...
public static long intRangeCheck(long value) { if ((value < Integer.MIN_VALUE) || (value > Integer.MAX_VALUE)) { throw new ArithmeticException("Integer overflow"); } return value; } public int addUseUpcasting(int a, int b){ return (int)intRangeCheck((long)a+(long)b); } ...
cache = archivedCache;// range [-128, 127] must be interned (JLS7 5.1.7)assertIntegerCache.high >=127; }privateIntegerCache(){} } 而对于valueOf(int i)方法,直接使用了常量池IntegerCache publicstaticIntegervalueOf(inti){if(i >= IntegerCache.low && i <= IntegerCache.high)returnIntegerCache.ca...
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 ...
结论:对比前三种情况可知使用range range 1 to 9后,编译器可以对硬件资源使用进行优化,效果相当于使用std_logic_vector(3 downto 0),其消耗的资源相同 第四种: 端口处使用integer 内部信号使用std_logic_vector(3 downto 0) --bcd:out std_logic_vector(3 downto 0); ...
端口或者信号被定义成integer，一般默认为32bit的。如果限定范围，如range 0 to 15 ，那么综合后会给...