The Tutorial shows you in Easy-Steps How to Install Oracle-Sun Java JDK 7 i586 for Linux Peppermint 3 Lxde i386 Desktop.
After Installing you will need to Use the update-alternatives Tool to Update your System Java to 1.7.
To the Article Bottom there is a Link for Quick Start with Java JDK 7 Development and also How to Install the Java Web-Servers Tomcat7 for Linux Peppermint.
And this Visual Guide includes the Basic Screenshots of All GUI Steps involved.
The Content give Focus Only to the Essentials Instructions and Commands to make it Easier to Follow.