How to make element unique in Java Collection

Java Collection can store many elements. Some Collection like Set must guarantee element unique. So, I want to know how to make it? In Java, which code can implement this function.

You would do this by using a Set of some type as you've mentioned.

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Originally Posted by jeanjiang

In Java, which code can implement this function.

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Have a look at the API : Set Interface

Some more details : Set Operations

You can use Google to find more code stuff.

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