How to install OpenJDK Java 7 plugin for Firefox browser in Ubuntu 12.04?

You need to install Icedtea Java Plugin package to execute Java Applets in Firefox browser. Just by installing OpenJDK package will not be enough.

Use the following steps:

• Hit windows key to open the Dash Home.
• Search for ubuntu.
• Select Ubuntu Software Center under Applications.
• Check if you have removed openjdk-6-jdk and icedtea6-plugin. If not, remove them from the Ubuntu Software Center.
• Check if you have installed OpenJDK Java 7 Runtime (openjdk-7-jre) and OpenJDK Java 7 Development Kit (openjdk-7-jdk). If not, install them from the Ubuntu Software Center.
• Search for icedtea-plugin in the Ubuntu Software Center.
• Select Icedtea Java Plugin and click the Install button.
• Restart your Firefox browser if you have opened the browser before.
• Finally, test your Java Applet.