A brief analysis of installing and uninstalling Java's JDK on Mac (share)

In the previous article "Teach you how to install and configure homebrew using mac (code sharing)", I introduced you how to install and configure homebrew using mac. The following article will help you understand the JDK installation and uninstallation of Java on Mac. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Uninstall steps

Delete java files

sudo rm -fr /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin
sudo rm -fr /Library/PreferencesPanes/JavaControlPanel.prefpane
sudo rm -fr ~/Library/Application\ Support/Java

Manual deletion may not be successful , it is recommended to go into the directory and check whether the file exists.

Delete jdk

#查找当前版本
#输入：
ls /Library/Java/JavaVirtualMachines/
#输出：jdk-9.0.1.jdk
sudo rm -rf /Library/Java/JavaVirtualMachines/jdk-9.0.1.jdk

Installation

brew tap caskroom/versions
brew cask install java8   # 安装java8
#brew cask install java  #默认安装最新版本

Configure Java environment variables

# 1.定位JAVA_HOME位置
/usr/libexec/java_home

# 2.编辑profile文件
vim ~/.bash_profile

# 3.格式参考

JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_152.jdk/Contents/Home
PATH=$JAVA_HOME/bin:$PATH
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

# 4.执行生效
source ~/.bash_profile

# 5.检查是否成功
echo $JAVA_HOME

Warning (2019.4. 17) The

brew method can no longer be installed. The official website of oracle cannot be downloaded now (java8). It prompts you to log in. After registering an account, you cannot log in for a long time. Just download it from Baidu Cloud.

The following is the download address, java8 for mac, take it without any thanks.jdk-8u201-macosx-x64 .dmg

New environment java12, project tossing After a long time, I suspected that it was a jdk version problem, so I returned to java8

Recommended learning: Mac OS Tutorial

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