java从arraylist创建重复记录

Question

[Froster,Seat1,Seat34,Seat35]

有人知道我如何把这个列表复制成这样吗

[Forster,Seat1],[Froster,Seat34]

等等

*更新！这就是我到目前为止所尝试的*

ArrayList<String> try1 = new ArrayList<String>();
        ArrayList<String> try2 = new ArrayList<String>();
        try1.add("Froster");
        try1.add("Seat1");
        try1.add("Seat23");
        try1.add("Seat35");
        System.out.println(try1);

        for (int i = 1; i<=try1.size(); i++){
            try2.add(try1.get(i));

        }
        System.out.println(try2);

所以你可以看到座位从第一个索引位置开始，所以现在我想存储到另一个列表中，如下所示

{[Forster,Seat1] [Forster,Seat34]}

Answer 1

按如下方式操作：

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<String> list = List.of("Froster", "Seat1", "Seat34", "Seat35");
        List<ArrayList<String>> lists = new ArrayList<ArrayList<String>>();
        String first = list.get(0);
        for (int i = 1; i < list.size(); i++) {
            lists.add(new ArrayList<String>(Arrays.asList(first, list.get(i))));
        }
        System.out.println(lists);
    }
}

输出：

[[Froster, Seat1], [Froster, Seat34], [Froster, Seat35]]