The Java runtime, java, is often in the same bin directory. If the installed version is older (i.e. it is Java 5 and you wish to use the more recent Java 7 release), you should proceed below with downloading and installing a JDK. It is possible that you have the Java runtime (JRE), but not the JDK.
Earlobe piercings typically heal completely within 4 to 6 weeks. However, ear cartilage piercings -- such as a tragus, conch or helix piercing -- do not heal fully for 3 to 6 months. Swelling and redness usually resolve fairly quickly, typically within about a week.
To prevent closure while the ring is out, retainers are available that maintain the hole's integrity. During the healing period, the hole can close within 24 hours. Nose piercings can take up to 8 months to heal fully depending on the area pierced. Healing occurs faster when the piercing is properly cared for through hygiene and avoiding trauma to the piercing.