在linux mint 上安装 Oracle JDK 的方法

Open up the Terminal (Alt + F2 > Terminal).
Remove OpenJDK installation.

1sudo apt-get update && apt-get remove openjdk*

Download Oracle JDK from here. You are looking for a linux version with tar.gz extension. Also choose the right version from 32-bit (x86) and 64bit (x64) one.
Change directory into one with downloaded tarball. In my case $HOME/Downloads.

1cd ~/Downloads

Extract tarball. Replace with a name of dowloaded file. (just press Tab and it will be autocompleted.)

1tar -zxvf jdk-

As a root create a folder in /opt where jdk will be stored.

1sudo mkdir -p /opt/java

Move extracted folder to /opt/java. In my case, version number was 1.7.0_25.

1sudo mv jdk1.7.0_25 /opt/java

Make JDK system default.

1sudo update-alternatives --install "/usr/bin/java" "java" "/opt/java/jdk1.7.0_25/bin/java" 1
2
3sudo update-alternatives --set java /opt/java/jdk1.7.0_25/bin/java

Test installed java version.

java version “1.7.0_25” Java(TM) SE Runtime Environment (build 1.7.0_25-b15) Java HotSpot(TM) 64-Bit Server VM (build 23.25-b01, mixed mode)

1$ java -version

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