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Java has java.util.UUID utility class using which you can generate universally unique identifier (UUID), following program demonstrate it.

import java.util.UUID;
import java.util.stream.IntStream;

public class GenerateUUID {
    public static void main(String[] args) {
        IntStream.range(0, 10).forEach((uuid) -> {
            System.out.println(UUID.randomUUID());
        });
    }
}

Output:

d311fba9-2442-4c84-ae2c-98a5892d9b90
ef4cbe7b-f758-454d-8898-7c0402a35956
b1946c42-fa9e-4ec1-b5d3-5b6300ed63d0
c92746c1-4baa-4eb9-8d4e-ed77ff1c7eba
6443fd59-8995-4269-bdf9-4495ae7260dd
61677697-e809-413e-8a2f-d08bd2153c2f
8156faa1-0016-421a-a861-a55b28edbe8b
97629e68-2b86-4f8c-a309-bad3d3525fbe
53420274-1d18-4ab1-9fc0-5c79a359c120
b8ab6514-83d9-4b2d-990d-6cdded57b544



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