java - 如何在 Java 中组合两个具有相同数量元素的列表？

Question

如何在 Java 中组合两个列表？ 到目前为止的输出是:

Firstname1
Firstname2
Firstname3
Lastname1
Lastname2
Lastname3
[[Firstname1, Firstname2, Firstname3], [Lastname1, Lastname2, Lastname3]]

我希望输出是:

[名字1 姓氏1，名字2 姓氏2，名字3 姓氏3}

import java.util.Arrays;
import java.util.List;
import java.util.Iterator;
import java.util.HashSet;

public class Main {

public static void main(String[] args) {
   List<String> peoplFname = Arrays.asList("Firstname1", "Firstname2", "Firstname3");
   List<String> peoplLname = Arrays.asList("Lastname1", "Lastname2", "Lastname3");
   Iterator<String> iterator = peoplFname.iterator();
   while(iterator.hasNext()) {
        System.out.println(iterator.next());
   }

   Iterator<String> iteratorx = peoplLname.iterator();
   while(iteratorx.hasNext()) {
       System.out.println(iteratorx.next());
   }

   HashSet peopleFullName = new HashSet();

   peopleFullName.add(peoplFname);
   peopleFullName.add(peoplLname);

   System.out.println(peopleFullName.toString());
}
}

Answer 1

使用addAll而不是 add，以便将列表中的所有元素添加到您的集合中。

将代码更改为:

peopleFullName.addAll(peoplFname);
peopleFullName.addAll(peoplLname);

更新:

根据更新的问题，您似乎想要合并两个列表中的相应元素。你走在正确的轨道上。您只需迭代两个列表，将名字与姓氏连接起来，然后将其添加到结果列表中:

List<String> peoplFname = Arrays.asList("Firstname1", "Firstname2", "Firstname3");
List<String> peoplLname = Arrays.asList("Lastname1", "Lastname2", "Lastname3");

Iterator<String> iterator = peoplFname.iterator();
Iterator<String> iteratorx = peoplLname.iterator();

List<String> peopleFullName = new ArrayList<String>(); 

while(iterator.hasNext() && iteratorx.hasNext()) {
    String fullName = iterator.next() + " " + iteratorx.next();
    peopleFullName.add(fullName);
}

System.out.println(peopleFullName);