摸摸Java - 随笔分类 - uTank

【Java】字节数组转换工具类

摘要：1 import org.apache.commons.lang.ArrayUtils; 2 3 import java.nio.charset.Charset; 4 5 /** 6 * 字节数组转换工具类 7 */ 8 public class BytesUtils { 9 10 public static final String ... 阅读全文

posted @ 2017-11-22 09:51 uTank 阅读(5903) 评论(0) 推荐(0)

【Java】字符串工具类

摘要：1 import android.annotation.SuppressLint; 2 3 import java.io.UnsupportedEncodingException; 4 import java.util.ArrayList; 5 import java.util.List; 6 import java.util.regex.Matcher; 7 ... 阅读全文

posted @ 2017-11-22 09:50 uTank 阅读(2476) 评论(0) 推荐(0)

【Java】身份证号码验证

摘要：代码引用自：https://gitee.com/appleat/codes/ynrtqujv0wfgesm8ia9b547 阅读全文

posted @ 2017-08-03 15:10 uTank 阅读(492) 评论(0) 推荐(0)

【Java】将字节转换成十六进制、BCD码输出

摘要：1 public class HexUtils { 2 3 public static void main(String[] args) { 4 byte []out = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 5 (byte)0x10... 阅读全文

posted @ 2017-08-02 18:49 uTank 阅读(4005) 评论(0) 推荐(0)

【Java】输出目录结构

摘要：1 import java.io.*; 2 import java.io.File; 3 import java.io.IOException; 4 5 public class FileUtil { 6 7 public static void main( String[] args ) throws IOException { 8 ... 阅读全文

posted @ 2017-08-01 15:50 uTank 阅读(379) 评论(0) 推荐(0)

Core Java Volume I — 1.2. The Java "White Paper" Buzzwords

摘要：1.2. The Java "White Paper" BuzzwordsThe authors of Java have written an influential White Paper that explains their design goals and accomplishments.... 阅读全文

posted @ 2015-07-06 11:15 uTank 阅读(364) 评论(0) 推荐(0)

Core Java Volume I — 5.1. Classes, Superclasses, and Subclasses

摘要：5.1. Classes, Superclasses, and SubclassesLet's return to the Employee class that we discussed in the previous chapter. Suppose (alas) you work for a ... 阅读全文

posted @ 2015-05-06 10:31 uTank 阅读(900) 评论(0) 推荐(0)

Core Java Volume I — 4.10. Class Design Hints

摘要：4.10. Class Design HintsWithout trying to be comprehensive or tedious, we want to end this chapter with some hints that will make your classes more ac... 阅读全文

posted @ 2015-04-23 15:23 uTank 阅读(199) 评论(0) 推荐(0)

Core Java Volume I — 4.7. Packages

摘要：4.7. PackagesJava allows you to group classes in a collection called a package. Packages are convenient for organizing your work and for separating yo... 阅读全文

posted @ 2015-04-23 14:57 uTank 阅读(357) 评论(0) 推荐(0)

Android开发之Java必备基础

摘要：Android开发之Java必备基础Java类型系统Java语言基础数据类型有两种：对象和基本类型（Primitives）。Java通过强制使用静态类型来确保类型安全，要求每个变量在使用之前必须先声明。这种机制和非静态类型的语言有很大差别，非静态语言不要求对变量进行声明。虽然显式类型声明看起来较繁琐... 阅读全文

posted @ 2015-04-19 23:03 uTank 阅读(15297) 评论(0) 推荐(0)

Core Java Volume I — 4.6. Object Construction

摘要：4.6. Object ConstructionYou have seen how to write simple constructors that define the initial state of your objects. However, since object constructi... 阅读全文

posted @ 2015-04-17 09:51 uTank 阅读(233) 评论(0) 推荐(0)

Core Java Volume I — 4.5. Method Parameters

摘要：4.5. Method ParametersLet us review the computer science terms that describe how parameters can be passed to a method (or a function) in a programming... 阅读全文

posted @ 2015-04-16 15:40 uTank 阅读(304) 评论(0) 推荐(0)

Core Java Volume I — 4.4. Static Fields and Methods

摘要：4.4. Static Fields and MethodsIn all sample programs that you have seen, the main method is tagged with the static modifier. We are now ready to discu... 阅读全文

posted @ 2015-04-15 17:49 uTank 阅读(312) 评论(0) 推荐(0)

Core Java Volume I — 4.1. Introduction to Object-Oriented Programming

摘要：4.1. Introduction to Object-Oriented ProgrammingObject-oriented programming, or OOP for short, is the dominant programming paradigm these days, having... 阅读全文

posted @ 2015-04-15 15:10 uTank 阅读(266) 评论(0) 推荐(0)

Core Java Volume I — 3.10. Arrays

摘要：3.10. ArraysAn array is a data structure that stores a collection of values of the same type. You access each individual value through an integer inde... 阅读全文

posted @ 2015-04-14 14:24 uTank 阅读(193) 评论(0) 推荐(0)

Core Java Volume I — 3.8. Control Flow

摘要：3.8. Control FlowJava, like any programming language, supports both conditional statements and loops to determine control flow. We will start with the... 阅读全文

posted @ 2015-04-14 14:22 uTank 阅读(470) 评论(0) 推荐(0)

Core Java Volume I — 3.6. Strings

摘要：3.6. StringsConceptually, Java strings are sequences of Unicode characters（Java的字符串是一个Unicode序列）. For example, the string "Java\u2122" consists of the... 阅读全文

posted @ 2015-04-14 14:20 uTank 阅读(257) 评论(0) 推荐(0)

Core Java Volume I — 3.5. Operators

摘要：3.5. OperatorsThe usual arithmetic operators +, -, *, / are used in Java for addition, subtraction, multiplication, and division. The / operator denot... 阅读全文

posted @ 2015-04-13 18:05 uTank 阅读(337) 评论(0) 推荐(0)

Core Java Volume I — 3.4. Variables

摘要：3.4. VariablesIn Java, every variable has a type. You declare a variable by placing the type first, followed by the name of the variable. Here are som... 阅读全文

posted @ 2015-04-13 18:04 uTank 阅读(255) 评论(0) 推荐(0)

Core Java Volume I — 3.3. Data Types

摘要：3.3. Data TypesJava is a strongly typedlanguage（强类型语音）. This means that every variable must have a declared type（每个变量都必须声明类型）. There are eight primiti... 阅读全文

posted @ 2015-04-13 17:29 uTank 阅读(265) 评论(0) 推荐(0)

随笔分类 - 摸摸Java