Java Note Finishing (ii), downloading and installing the JDK

　　Windows platform

1. Log in to the Oracle website (http://www.oracle.com/index.html) to find the download

　　

2. Select the version you want to download and click JDK DOWNLOAD

　　

3. Download the file, tick "Accept License agreement" and select the appropriate version to download

　　

4. Install the installation files directly, it is recommended not to install in the Chinese directory, preferably not installed in a directory with spaces

Linux platform (Ubuntu for example)

1. Download the JDK and unzip it, such as unpacking the JDK to/opt/java.1.7.0

2. Modify the configuration file ~/.BASHRC, and then add the following code and Save:

Export java_home=/opt/java.1.7.0 export jre_home=${JAVA_HOME}/JRE export classpath=.:${java_home}/lib:${ jre_home}/Lib Export PATH=${java_home}/bin: $PATH

　　3. Make it effective immediately:

SOURCE ~/.BASHRC

　　4. In Terminal input:

sudo update-alternatives--install/usr/bin/java java/opt/java.1.7.0/bin/javasudo update-alternatives-- Install/usr/bin/javac Javac/opt/java.1.7.0/javac 300

　　

The terminal input java-version appears in the format shown, the installation succeeds

　　　　　　

Java Note Finishing (ii), downloading and installing the JDK