删除集合中重复的元素
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class Main {
public static void main(String[] args) {
// A string array with duplicate values
String[] data = { "A", "C", "B", "D", "A", "B", "E", "D", "B", "C" };
System.out.println("Original array : " + Arrays.toString(data));

List<String> list = Arrays.asList(data);
Set<String> set = new HashSet<String>(list);

System.out.print("Remove duplicate result: ");

String[] result = new String[set.size()];
set.toArray(result);
for (String s : result) {
System.out.print(s + ", ");
}
}
}