Introduction, download, installation, configuration of environment variables, testing of Java JDK

Introduction to JDK

Java Development Kit 简称 JDK,即java开发工具包,是编写java代码最基本的要求;
Java Runtime Environment 简称 JRE,即java运行环境,支持java程序的运行,但是不能编写、编译;
Java Virtual Machine 简称 JVM ,即java虚拟机,不太好解释,初学者知道java能够实现跨平台的特点就是因为有了JVM的存在。
注意:
JDK 中包含 JRE
JRE 中包含了 JVM

JDK download

这里给大家提供了Windows 64位 1.8的版本:
链接:https://pan.baidu.com/s/1K6QyU2MYIvlNobgB72efjw 
提取码:xzsq
若需其他版本,请移步官网自行选择:https://www.oracle.com/java/technologies/javase-downloads.html

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JDK installation

安装前确认电脑上没有安装相同版本的JDK

Step 1: Double-click the downloaded installation package, and see the picture below:

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Step 2: Click "Next" to see the picture below:

注意:一般情况下,安装路径要求 1、不能存在中文和空格; 2、不建议安装到系统盘C盘

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Step 3: Click "Change":

将路径更改到自己定义的位置----请务必牢记
例如:D:\SoftWare\Java\jdk1.8.0_231\     ----  这是我自己的路径,大家可自行更改

Step 4: Click "Next" as shown in the figure below, and wait at this time:

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Step 5: After the above steps are installed, the following interface will appear:

这是安装JRE的界面,建议将路径更改为与之前安装JDK的同级路径
例如:JDK--D:\SoftWare\Java\jdk1.8.0_231\ 
     JRE--D:\SoftWare\Java\**jre**1.8.0_231\ 

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Step 6: After changing the path, click Next:

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Step 7: Wait until it appears:

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Step 8: Click Close, congratulations, the JDK is installed successfully.

JDK environment variable configuration

1、选中 此电脑-右键-属性-高级系统设置-环境变量

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2、在系统变量中 新建
	变量名:JAVA_HOME
	变量值:	D:\SoftWare\Java\jdk1.8.0_231\   ---   JDK的安装位置  填自己的

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	3、在系统变量中 找到path 编辑
	追加两行即可: 若是win7   请以;(英文的分号)隔开
	之后一路点击确定

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Test whether the JDK installation is successful

使用cmd命令打开命令行模式窗口(小黑窗口)分别测试  java 、javac、java -version命令

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If the above effects appear, congratulations, the JDK installation and testing are successful! ! ! !

If you have any questions above
, please contact: QQ 897884044. If you think it is helpful to you, can you ask the author for a cup of coffee?
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Origin blog.csdn.net/weixin_44796239/article/details/106937585