From the zero-learning Java transcript-the No. 0 chapter

from the zero-learning Java transcript-the No. 0 chapter

Written in the previous words:

always want to learn the Java process to share their own, was just too lazy, recently work and too busy. Finally, the national day, sorting out their own from scratch to learn Java notes. In the future, regardless of busy efforts to insist on at least one to two articles per day. I hope I can stick to it.

This article mainly introduces some basic things and the characteristics of Java

1: Basic knowledge

What is software development

1. What is software

Software: A collection of computer data and instructions organized in a specific order.

Description

Data: such as personal information, company information, student information, music, videos, pictures, etc.

Instructions: Tell the computer how to manipulate the data

A collection of data that tells the computer to install a specific sequence of operations is software.

Common software in your life:

System software:

PC End (PC side):

such as: DOS, Windo, Liunx, Apple systems, etc.

Client (mobile phone, tablet side):

such as: Android system, Apple ISO system, Saipan system and so on.

Application software:

PC side:

such as: QQ, 360, Thunder, minesweeper, etc.

Client:

such as: Mobile phone QQ, mobile games and so on.

Interactive mode:

What is human-computer interaction?

l What is a computer language?

Language: A way for people to communicate with each other

For example: Chinese communicate with Chinese in Chinese

Chinese people communicate with Americans, they must learn English

Computer language: The way people communicate with computers

If people want to communicate with computers, they need to learn computer language.

There are many kinds of computer languages. such as:C, C + +, Java, etc.

we'll learn one of the following:the Java language.

used in DOS command

open Windows Command Line window shortcut key: Wind key +r and then enter CMD carriage return

Dir: Lists the files and folders in the current directory

MD: Creating a Directory

RD: Deleting a directory

CD: Enter the specified directory

CD: Back to top level directory

Cd\: Go back to the root directory

Del: Delete Files

CLD: Clear Screen

Exit: Exit DOS command

Three technical architectures for the Java language:

Features of the Java language:

Platform-based

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From the zero-learning Java transcript-the No. 0 chapter