java中的pythonzip方法

Question

在java中是否有类似于pyton的zip方法

a = ("John", "Charles", "Mike")
b = ("Jenny", "Christy", "Monica")

x = zip(a, b)

（‘约翰’、‘珍妮’、‘查尔斯’、‘克里斯蒂’、‘迈克’、‘莫妮卡’）

Answer 1

我用IntStream找到了解决方案

List<String> names1 = new ArrayList<>(Arrays.asList("John", "Charles", "Mike", "Dennis"));
List<String> names2 = new ArrayList<>(Arrays.asList("Jenny", "Christy", "Monica"));
IntStream
  .range(0, Math.min(names1.size(), names2.size()))
  .mapToObj(i -> names1.get(i) + ":" + names2.get(i))
  .toList();

但JOOL library提供了外观更好的解决方案

Seq
  .of("John","Charles", "Mike")
  .zip(Seq.of("Jenny", "Christy", "Monica"));

Answer 2

不，您必须通过循环列表来创建地图：

public Map<String, String> zip(List<String> a, List<String> b) {
    var map = new HashMap<String, String>();

    for (var i = 0; i < a.size(); i++) {
        map.put(a.get(i), b.size() <= i ? b.get(i) : null);
    }
    
    return map;
}