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.
Allow Piercings to Heal for Six to Eight weeks. Piercing professionals recommend wearing only piercing studs in your newly pierced earlobes for six to eight weeks. This will give the piercings time to heal and strengthen. After this time the original studs can be removed and heavier, dangling earrings can be worn.