[Java] Get a random value from an array

Use Collections.shuffle

import java.util.Arrays;
import java.util.Collections;
import java.util.List;

List<String> list = Arrays.asList("AA", "BB", "CC");
System.out.println(list); // =>  [AA, BB, CC]

System.out.println(list);  // => [CC, AA, BB]

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