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文章目录
  1. 1. windows
  2. 2. mac os:
  3. 3. ubuntu

windows

下载安装并配置path路径， JAVA_HOME环境变量

mac os:

下载安装

ubuntu

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切换jdk
update-alternatives --config java
tar -zvfx jdk-7u72-linux-x64.tar.gz
sudo mv -rf jdk1.7.0_72/ /opt/jdk1.7.0_72
apt-get install openjdk-7-jdk
##先检查java安装情况
sudo update-alternatives --display java
sudo update-alternatives --display javac
sudo update-alternatives --remove java /opt/jdk1.6.0_43/bin/java
sudo update-alternatives --remove javac /opt/jdk1.6.0_43/bin/javac
确认这些符号链接(symlinks)是否都删除了
java -version
javac -version
### 重新配置java链接 
sudo update-alternatives --install /usr/bin/java java /opt/jdk1.6.0_43/bin/java 300
sudo update-alternatives --install /usr/bin/java java /opt/jdk1.7.0_72/bin/java 400
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/java-7-openjdk-amd64/bin/java 500

sudo update-alternatives --install /usr/bin/javac javac /opt/jdk1.6.0_43/bin/javac 300
sudo update-alternatives --install /usr/bin/javac javac /opt/jdk1.7.0_72/bin/javac 400
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/java-7-openjdk-amd64/bin/javac 500
# 在需要的时候进行手动切换即可
sudo update-alternatives --config java
sudo update-alternatives --config javac
文章目录
  1. 1. windows
  2. 2. mac os:
  3. 3. ubuntu