java语言程序设计基础篇笔记
1.
几种有名的语言
COBOL:商业应用
FORTRAN:数学运算
BASIC:易学易用
Visual Basic,Delphi:图形用户界面
C:汇编语言的强大功能和易学性,可移植性
C++:系统软件
C#:.net
java:互联网应用程序
2.
java语言规范:java.sun.com/docs/books/jls 对语言的技术定义
javaAPI(Application Program Interface):预定义的类和接口
3.
javaEE:服务器端的应用程序
javaSE:客户端的应用程序和applet
javaME:移动设备
4.
JDK:Java Developer's Kit
JRE:Jave Runtime Environment
5.
class name
NoClassDefFoundError
main method
NoSuchMethodError
statement terminator
reserved word(keyword)
comment
line comment
block comment
block
class block
method block
6.
java 字节码 bytecode
JVM
class loader
bytecode verifier:检验字节码的合法性
7.
javax.swing.JOptionPane.showMessageDialog(null,"welcome to java","title",JOptionPane.INFORMATION_MESSAGE);
8.
specific import
wildcard import
9.
java.lang包被隐式导入,包括Systemlei
关键术语:
.class file
.java file
assembly language
bit
block
block comment
bus
byte
bytecode
bytecode verifier
cable modem
central processing unit
class loader
comment
complier
console
dot pitch
DSL:Digital Subscriber Line
hardware
high-level language
Integreted Development Environment
java command
javac command
Java Development Kit
Java Runtime Eenvironment
Java Virtual Machine
keyword
reserved word
line command
machine language
main method
memory
modem
Network Interface Card (NIC)
Operating System
pixel
program
programming
resolution
software
source code
source file
specific import
wildcard import
statement
storage devices