JLS解读:https://docs.oracle.com/javase/specs/jls/se7/html/jls-5.html 基本数据类型的转换 1) boolean不可以转换为其他的数据类型 2) 整数型,浮点类型,字符型是可以相互转换的,转换时遵守下面的原则: a. 容量小的类型自动转换为大的类型,数据类型按容量大小排序为: byte, short, char < int < long <float < double b. byte, short, char 三种类型间…

Background C++ is one of the main development languages used by many of Google's open-source projects. As every C++ programmer knows, the language has many powerful features, but this power brings with it complexity, which in turn can make code more…

http://julialang.org/ julia | source | downloads | docs | blog | community | teaching | publications | gsoc | juliacon | rss Julia is a high-level, high-performance dynamic programming language for technical computing, with syntax that is familiar to…

Google C++ Style Guide   Table of Contents Header Files Self-contained Headers The #define Guard Forward Declarations Inline Functions Names and Order of Includes Scoping Namespaces Unnamed Namespaces and Static Variables Nonmember, Static Member, an…

5. Conversions and Promotions 5.1. Kinds of Conversion 5.1.1. Identity Conversion 5.1.2. Widening Primitive Conversion 5.1.3. Narrowing Primitive Conversion 5.1.4. Widening and Narrowing Primitive Conversion 5.1.5. Widening Reference Conversion 5.1.6…

背景 小白最近有点烦恼,原因也很简单,不知道为何?小白的消费不知不觉被迫升级了,请看费用清单: for (byte b = Byte.MIN_VALUE; b < Byte.MAX_VALUE; b++) { if (b == 0x90) System.out.print("life is Happy!"); } 本来小白预期输出结果: life is Happy! 但是什么都没有输出,这是怎么回事呢?是不是以后的幸福小日子就没了? 于是小白向柯南请教: 破案 为了比较byte…

以下来自msdn: Objects of an integral type can be converted to another wider integral type (that is, a type that can represent a larger set of values). This widening type of conversion is called "integral promotion." With integral promotion, you can…

Chapter 3. Compiling for the Java Virtual Machine 内容列表 3.1. Format of Examples 3.2. Use of Constants, Local Variables, and Control Constructs 3.3. Arithmetic 3.4. Accessing the Run-Time Constant Pool 3.5. More Control Examples 3.6. Receiving Argument…

Chapter 2. The Structure of the Java Virtual Machine 内容列表 2.1. The class File Format (class文件的格式) 2.2. Data Types (数据类型) 2.3. Primitive Types and Values (原始数据类型和值) 2.3.1. Integral Types and Values 2.3.2. Floating-Point Types, Value Sets, and Values 2…

CHAPTER 2 Recipe 2-1. Initializing Variables Recipe 2-2. Initializing Objects with Initializer Lists 使用初始化列表的使用 Recipe 2-3. Using Type Deduction 关于auto关键字的使用 Recipe 2-4. Using auto with Functions Recipe 2-5. Working with Compile Time Constants conste…