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