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《Head First Java》读书笔记----ZhangHao

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Head First Java 读书笔记

Head First Java 读书笔记 ..................................................................................................................................................1

一：基本概念 ...............................................................................................................................................................2

二：类与对象 ...............................................................................................................................................................3

三：原始的主数据类型和引用 ...............................................................................................................................3

四：方法操作实例变量 .............................................................................................................................................6

五：编写程序 ...............................................................................................................................................................7

六：认识 Java 的 API （使用 Java 库函数）.....................................................................................................7

ArrayList：长度自动动态改变的集合类（对象） ...................................................................................7

比较 ArrayList 与一般数组：..........................................................................................................................7

库函数： ...............................................................................................................................................................8

第七章：继承与多态。 .............................................................................................................................................8

多态 ........................................................................................................................................................................9

方法的覆盖（重写 Overriding）：子类重写父类方法............................................................................9

方法的重载（overload）：在一个类中讨论............................................................................................10

第八章：接口与抽象类（深入多态） ...............................................................................................................10

抽象类 .................................................................................................................................................................10

Object 类（java.lang.Object）有什么？： .............................................................................................10

接口： .................................................................................................................................................................11

《Head First Java》读书笔记----ZhangHao

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Super....................................................................................................................................................................12

第九章：构造器与垃圾收集器（对象的前世今生）....................................................................................13

堆与栈：生存空间...........................................................................................................................................13

成员变量，实例变量，类变量（静态变量）局部变量 ......................................................................13

构造方法，类方法，实例方法的区别 ......................................................................................................13

创建对象.............................................................................................................................................................13

调用父类构造函数...........................................................................................................................................13

This().....................................................................................................................................................................14

数字与静态 .................................................................................................................................................................14

Math.....................................................................................................................................................................14

Static.....................................................................................................................................................................14

Final ......................................................................................................................................................................15

主数据类型的包装类 ......................................................................................................................................15

数字（日期）的格式化..................................................................................................................................16

操作日期.............................................................................................................................................................16

有静态的 import...............................................................................................................................................17

11：异常处理.............................................................................................................................................................18

14：序列化(serialization)、IO：保存对象........................................................................................................19

Java.io.File...........................................................................................................................................................20

缓冲区（好比超市的推车！！！）..................................................................................................................21

读取文本文件： ...............................................................................................................................................21

写入文本文件....................................................................................................................................................22

解析字符串（用字符串中的特殊字符）..................................................................................................22

15:网络与线程............................................................................................................................................................22

建立 Socket 连接..............................................................................................................................................22

《Head First Java》读书笔记----ZhangHao

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端口......................................................................................................................................................................22

读取 Socket........................................................................................................................................................23

客户端代码：....................................................................................................................................................23

服务器端代码....................................................................................................................................................24

线程......................................................................................................................................................................25

如何启动新的线程。 ......................................................................................................................................25

并发性问题 ........................................................................................................................................................26

死锁......................................................................................................................................................................26

16:集合与泛型............................................................................................................................................................27

泛型......................................................................................................................................................................28

Compareable.....................................................................................................................................................28

集合......................................................................................................................................................................28

对象的等价 ........................................................................................................................................................28

一：基本概念

Java 的工作方式：