Java Programming Basics Review notes first unit

Java Language Programming Basics notes
1.
Several well-known languages
COBOL: Business Applications
FORTRAN: Mathematical operations
BASIC: Easy to learn and use
Visual Basic,delphi: Graphical user interface
C: assembly language of powerful features and ease of learning, portability
C + +: System software
C#:.net
Java: Internet Applications
2.
Java language Specification: JAVA.SUN.COM/DOCS/BOOKS/JLS technical definition of language
JAVAAPI (Application program Interface): predefined classes and interfaces
3.
Java EE: server-side applications
Javase: Client-side applications and applets
Javame: Mobile Devices
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 byte Code bytecode
Jvm
Class Loader
Bytecode verifier: Verifying the legality of byte codes
7.
Javax.swing.JOptionPane.showMessageDialog (NULL, "Welcome to Java", "title", Joptionpane.information_message);
8.
Specific Import
Wildcard Import
9.
Java.lang packages are implicitly imported, including Systemlei

Key Terms:
. 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

Java Programming Basics Review notes first unit