Google Guava“压缩”两个列表
使用Google Guava(Google Commons),是否可以将两个大小相等的列表合并为一个列表,而新列表包含两个输入列表的复合对象?
例:
public class Person { public final String name;
public final int age;
public Person(String name, int age) {
this.name = name;
this.age = age;
}
public String toString() {
return "(" + name + ", " + age + ")";
}
}
和
List<String> names = Lists.newArrayList("Alice", "Bob", "Charles");List<Integer> ages = Lists.newArrayList(42, 27, 31);
List<Person> persons =
transform with a function that converts (String, Integer) to Person
System.out.println(persons);
将输出:
[(Alice, 42), (Bob, 27), (Charles, 31)]
回答:
从Guava
21开始,可以通过以下方式实现Streams.zip()
:
List<Person> persons = Streams.zip(names.stream(), ages.stream(), Person::new) .collect(Collectors.toList());
以上是 Google Guava“压缩”两个列表 的全部内容, 来源链接: utcz.com/qa/403853.html