Intermediate Java(16) – HashSet

import java.util.*;

public class apples{

public static void main(String[] args){

String[] things = {"apple","orange","mango","pineapple","mango"};

List<String> list = Arrays.asList(things);

System.out.printf("%s ", list);

System.out.println();

Set<String> set = new HashSet<String>(list); → 將所有重複內容刪除

System.out.printf("%s ", set);

}

}

這是運行時的結果:

[apple, orange, mango, pineapple, mango]

[orange, apple, mango, pineapple]