float and double

 Part 2: Basic Information Representation and basic information processing main content: L basic data representation, including basic data types, constants and variables; L basic data processing, mainly introduces various basic operators; l process

Attributes describe the features of elements and store them in tables. When creating a new attribute table or adding fields to an existing Attribute Table, you must specify the data type and field attribute, such as precision or length ). Data Type

Skfixedtofloat or the opposite operation is often encountered in skia. It is easy to convert a single-precision floating point to a fixed number. Simply multiply 65536 and then force the next type. This is what float2fixed does. I forgot where I saw

1. What is alignment and why: 1. in modern computers, memory space is divided by byte. Theoretically, it seems that access to any type of variables can start from any address, however, the actual situation is that access to specific variables is

Preface:Java's library is growing and contains countless classes and interfaces. But there are some very important classes and interfaces, which are the core part of the Java class library. Common examples include string, object, class, collection,

Generally, the number type in Oracle is set to number without length, which provides better scalability. You don't need to worry about integer or decimal number, and the space occupied by length is also related to the stored value. The length of the

  Real NumberAlso knownFloating Point Number. Floating PointThe decimal point is not fixed.Number of pointsThat is, the decimal point is fixed. IntegerIt can be seen asA special number of points, that is, the decimal point is at the end..

Class hashmap, but the memory is reduced to 1/6 of the original implementation Time:11:08:33 Source:Network Author:Unknown Click:The 429 Java map is convenient and practical, and there is a huge memory waste. When the number of entries in the map

The method area is used in the loading phase: The method area is the runtime memory area that can be shared by each thread. Stores the structure information of each class, such as the runtime constant pool), field and method data, constructor and

  I have never learned C language and only learned C ++ before, so I learned C language. In fact, I personally think the difference between C and C ++ is very small, basically, the difference between the output and input of printf and scanf is that

I occasionally browsed this article on the Internet, but I modified it and shared it with you. I have been working for a long time, but I still cannot understand C # value type and C # reference type. I have spent a lot of time searching for

Let's take a look at the following example: public class Test{public static void main(String[] args){double sum=0;double temp=0.38;for(int i=0;i   After the program runs, the following result is printed:   Sum: 0.380.38Sum: 0.760.76Sum: 1.14000000000

Author: skateTime: 2012/05/24   Description of Data Structure Design (table and index creation) Table Design 1. Data Type Selection 1) number type: it can be divided into integer and floating-point data types. The difference between them is that the

Sizeof is an operator in C/C ++. Simply put, the function is to return the memory bytes occupied by an object or type. The returned type is size_t.   Syntax:Sizeof has three syntax forms:1) sizeof (object); // sizeof (object );2) sizeof (type_name);

Java performance optimization tips I. General1.1 create a class instance without the New Keyword1.2 use non-blocking I/O1.3 usage exceptions with caution1.4 do not reinitialize the variable1.5 specify the final modifier of the class as much as

Address: http://blog.csdn.net/biblereader/archive/2006/06/21/819428.aspx  Two years ago, I knew that the equal number of floating point numbers should not be determined by the = number, because there is a precision problem, but I have never cared

Keywords: sizeof, byte alignment, multi-inheritance, virtual inheritance, member function pointer Forward Declaration: Sizeof, a handsome guy, leads countless cainiao to fold his waist. I didn't make too many mistakes at the beginning, sticking to"I

Android code optimization [go] Designed for performance:1) Avoid creating objectsObject creation is never free. Although GC makes the memory application cost no longer high, the application is always more expensive than the application. If

This work is licensed using the "knowledge sharing signature"-"non-commercial use"-2.5 mainland China License Agreement in the same way.     Whether in C/C ++ or Java, forced type conversion is no stranger. However, to fully master the key points of

I have sorted out some code and optimization methods that affect performance, and hope to supplement and optimize them in the future. 1. How to use exceptionException reduces performance. To throw an exception, you must first create a new object.