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.
Earring holes can close particularly fast within the first year following piercing. Without an earring, the diameter of the hole shrinks considerably and can completely close. For this reason, it is recommended that someone with a new piercing keep the original earring in for at least six weeks before removing. After six weeks, the earring can be removed for cleaning, but it is recommended to quickly replace the earring in the new hole for up to a full year to prevent closure.