Linux installs JDK using ppa/source mode

1. Add PPA

sudo add-apt-repository ppa:webupd8team/javasudo apt-get update

2. Installing Oracle-java-installer

Jdk7

sudo apt-get install Oracle-java7-installer

Jdk8

sudo apt-get install Oracle-java8-installer

The installer will prompt you to agree to Oracle's terms of service, select OK

Then select Yes to

If you're lazy, don't want to manually click on it yourself. You can also add the following command, by default, agree to the terms:

JDK7 Default Selection Terms

echo oracle-java7-installer Shared/accepted-oracle-license-v1-1 Select True | Sudo/usr/bin/debconf-set-selections

JDK8 Default Selection Terms

echo oracle-java8-installer Shared/accepted-oracle-license-v1-1 Select True | Sudo/usr/bin/debconf-set-selections

Next will be waiting (depending on the speed of the individual)

If you cause installer to download slowly due to firewalls or other reasons, you can interrupt the operation. Then download the tar.gz package for the corresponding JDK, and put it in:

/var/cache/oracle-jdk7-installer (JDK7)

/var/cache/oracle-jdk8-installer (JDK8)

Below, and then install the installer once. Installer will use the TAR.GZ package you downloaded by default

3. Set the system default JDK

JDk7

sudo update-java-alternatives-s java-7-oracle

JDK8

sudo update-java-alternatives-s java-8-oracle

If the JDK7 is installed and the JDK8 is installed, to switch between the two, you can:

JDK8 Switch to Jdk7

sudo update-java-alternatives-s java-7-oracle

JDK7 Switch to Jdk8

sudo update-java-alternatives-s java-8-oracle

4. Test whether the JDK was installed successfully:

Java-versionjavac-version

Linux installs JDK using ppa/source mode