剔除数组或List中重复的元素

import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class NonDuplicatesList {

    public static void main(String[] args) {
    String[] colors = { "red", "white", "blue", "green", "gray", "orange", "tan", "white", "cyan", "peach", "gray",
        "orange" };
    List<String> list = Arrays.asList(colors);
    System.out.printf("List: %s%n", list);

    // eliminate duplicates then print the unique values
    printNonDuplicates(list);
    } // end method main

    // create a Set from a Collection to eliminate duplicates
    private static void printNonDuplicates(Collection<String> values) {
    // create a HashSet
    Set<String> set = new HashSet<>(values);

    System.out.printf("%nNonduplicates are: ");

    for (String value : set)
        System.out.printf("%s ", value);

    System.out.println();

    } // end method printNonDuplicates

} // end class NonDuplicatesList