idea开发的时候,Math.ceil(Integer.parseInt(num)/1000)发现有黄线,出现了‘integer division in floating-point context’提示。 写一个main方法发现Math.ceil(4800/1000)结果居然是4.0,查了一下:两个整数相除,结果必定是整数。如果用float、double等数据类型接收,语法上不构成错误,但是会丢失精度。 解决方法很简单,在前面乘1.0转float就好啦,实际...
Floating-point arithmetic is usually done in hardware to make it fast. This hardware, called the floating-point unit (FPU), is typically distinct from the central processing unit (CPU). The infamous floating-point division (FDIV) bug in the Pentium FPU cost Intel $475 million to recall and...
Affects PMD Version: 7.10.0 Rule: UnnecessaryCast Description: Division (or multiplication) of primitive integer and boxed integer in floating-point context is detected as unnecessary cast. Code Sample demonstrating the issue: Code: clas...
a multiplication operation unit and a division operation unit; and the demultiplexer selects a register of an operation result of the corresponding operation unit according to the input operator, and checks whether the operation and a to-be-output operation result trigger the abnormity of a floatin...
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<, <=, >, >= Relational operators +, – Unary sign operators +, –, *, /, % Addition, subtraction, multiplication, division, and remainder operators +=, –=, *=, /= Addition, subtraction, multiplication, division, and assign operators ++, –– Increment and decrement operators<...
There are more in the IEEE-754! Real numbers doesn’t satisfy closure property) as integers does. Notably, the set of real numbers is NOT closed under the division! It could produce non-number results such as infinity (e.g. 1/0) and NaN (Not-a-Number) (e.g. taking a square root...
We will often be crossing (meaning addition, subtraction, multiplation, and occasional division) floats with other floats, as well as ints. We may need to go to doubles to retain percision. We may not, but perhaps I should just do everything as doubles to be on the safe side. Is ...
The floating-point operations of the Java Virtual Machine do not throw exceptions, trap, or otherwise signal the IEEE 754 exceptional conditions of invalid operation, division by zero, overflow, underflow, or inexact. The Java Virtual Machine has no signaling NaN value. The Java Virtual Machine ...
The exponent field is interpreted in one of three ways. An exponent of all ones indicates the floating-point number has one of the special values of plus or minus infinity, or “not a number” (NaN). NaN is the result of certain operations, such as the division of zero by zero. An ...