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Java程序设计 教程教学讲义I.pdf
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1 Java2初步.................................................................................................................................1 1.1 Java特点.......................................................................................................................1 1.2 简单的Java程序..........................................................................................................1 1.3 简单的Java Applet程序和主要方法..........................................................................2 1.3.1 浏览器执行applet的主要过程.......................................................................3 1.3.2 applet主要方法有...........................................................................................3 2 标识符、关键字和数据类型、运算符、表达式和语句.......................................................4 2.1 标示符、关键字...........................................................................................................4 2.2 数据类型.......................................................................................................................5 2.3 静态常量.......................................................................................................................6 2.4 顺序结构.......................................................................................................................6 2.4.1 Scanner 类.........................................................................................................7 2.4.2 const ..................................................................................................................8 2.4.3 整除/运算符.....................................................................................................8 2.4.4 JOptionPane 类.................................................................................................8 2.5 选择结构.....................................................................................................................10 2.6 循环结构.....................................................................................................................11 2.7 package 和import语句..............................................................................................12 3 类和对象.................................................................................................................................12 3.1 类和对象的基本概念.................................................................................................12 3.2 类的UML图表示.......................................................................................................12 3.3 封装、继承和方法重载.............................................................................................13 3.4 构造方法.....................................................................................................................13 3.4.1 对象的创建.....................................................................................................13 3.4.2 引用变量.........................................................................................................14 3.4.3 声明变量和创建对象.....................................................................................14 3.4.4 访问对象的实例变量和实例方法.................................................................14 3.4.5 基本类型变量和引用类型变量的区别.........................................................14 3.4.6 基本类型变量和引用类型变量赋值的区别.................................................15 3.5 类修饰符.....................................................................................................................15 3.6 类的结构.....................................................................................................................15 3.7 类成员访问修饰符.....................................................................................................16 3.8 成员变量.....................................................................................................................17 3.9 Getter和Setter方法.................................................................................................17 3.10 对象的概念和类型.................................................................................................17 3.11 对象的内存模型.....................................................................................................18 3.12 对象方法和属性的使用.........................................................................................19 3.13 将对象传递给方法.................................................................................................21 3.14 对象数组.................................................................................................................21 3.15 实例变量和类变量的区别.....................................................................................22 3.16 静态方法.................................................................................................................25 3.17 实例方法和类方法的区别.....................................................................................26 3.18 类的继承.................................................................................................................26 3.19 父类和子类.............................................................................................................29 3.20 继承的父子类类型转换.........................................................................................29 3.21 继承时成员变量的隐藏和方法的重写.................................................................30 3.22 覆盖和重载.............................................................................................................32 3.23 Object类.....................................................................................................................32 3.24 多态性、动态绑定.................................................................................................33 3.25 通用编程.................................................................................................................33 3.26 对象类型转换.........................................................................................................34 3.27 隐藏数据字段和静态方法.....................................................................................35 3.28 protected修饰符........................................................................................................35 3.29 final类和final方法....................................................................................................35 3.30 abstract类和abstract方法........................................................................................35 3.31 变量的作用域.........................................................................................................38 3.32 this...............................................................................................................................38 3.33 super 的使用..............................................................................................................39 3.34 接口interface .........................................................................................................41 3.34.1 接口的两个方面含义.....................................................................................41 3.34.2 接口和抽象类的区别.....................................................................................41 3.34.3 接口回调.........................................................................................................45 3.35 Date 类........................................................................................................................48 4 数组和字符串.........................................................................................................................52 4.1 一维数组.....................................................................................................................52 4.1.1 声明数组引用变量.........................................................................................53 4.1.2 创建数组.........................................................................................................53 4.1.3 数组初始化.....................................................................................................54 4.1.4 访问数组.........................................................................................................54 4.1.5 增强的for循环..............................................................................................54 4.1.6 复制数组.........................................................................................................55 4.1.7 数组作为参数传递.........................................................................................55 4.2 二维数组.....................................................................................................................55 4.2.1 二维数组声明.................................................................................................55 4.2.2 二维数组的长度.............................................................................................56 4.2.3 不规则数组.....................................................................................................56 4.3 字符串数组.................................................................................................................56 4.4 字符串.........................................................................................................................56 4.4.1 java.lang.String................................................................................................59 4.4.2 String构造函数..............................................................................................59 4.4.3 字符串的存储特点.........................................................................................59 4.4.4 规范字符串.....................................................................................................60 4.4.5 字符串的比较.................................................................................................60 4.4.6 连接字符串.....................................................................................................60 4.4.7 字符串转换.....................................................................................................60 4.4.8 查找字符或字符串.........................................................................................61 |
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