What is the 3 dot operator?

Example:
public GlobalKey(String category, String... keys) {
this.category = (category == null ? "" : (category.equals("-") ? "" : category.toLowerCase()));
if (keys.length >= 1) {
this.key1 = (keys[0] == null ? "" : (keys[0].equals("-") ? "" : keys[0].toLowerCase()));
if (keys.length >= 2) {
this.key2 = (keys[1] == null ? "" : (keys[1].equals("-") ? "" : keys[1].toLowerCase()));
if (keys.length >= 3)
It looks similar to an Array, if so what is the difference?

yawmark wrote:
The ternary operator is......not what the OP is talking about. ;o)
~I thought the same thing at first. I had no idea what a vararg was, so I wasn't looking for one. And I didn't notice the dots after String. What I did notice was the colon being used in the ternary statements. Which made me think the subject line was a typo, and he meant "2 dot operator" in regards to the colon.

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What is the 3 dot operator?

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