一、打开jdk下载的官网地址 https://www.oracle.com/java/technologies/javase-downloads.html
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官网为windows用户提供了两种格式的安装包,这里我们选择exe安装包。
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勾选复选框,然后点击Download jdk-15.0.2_windows-x64_bin.exe。等待下载完毕。
双击打开安装包
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这里我们把java安装到C:\根目录,点更改,指定安装路径。点确定后如下图,然后点下一步。
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以上界面说明已经安装成功。点击关闭
二、配置环境变量
在桌面左上角找到“此电脑”,右键点击选择“属性”
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这里我们首先新建一个系统变量JAVA_HOME,设置其值为Java的安装目录C:\Java\jdk15。该变量设置,在设置其他环境变量时可以直接使用JAVA_HOME。在使用eclipse或其他IDE都可以识别出Java15的安装位置。
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设置第二个环境变量CLASSPATH,值为.;%JAVA_HOME%\lib 指定Java类库的位置
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找到Path变量,点击编辑,然后新建两项
%JAVA_HOME%\bin
%JAVA_HOME%\jre\bin
至此,环境变量设置完毕。下面我们来验证安装是否成功
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如上图显示,说明你已经安装成功。接下来我们可以学习java了。