java - 使用 java 流将 String[] str = {"a","b","c","d","e","f"} 映射为 {a=b, c=d, e=f}

Question

我有下面的代码来实现需求，但无法使用stream解决，我不知道如何在管道中增加i

String[] str = {"a","b","c","d","e","f"};
    Map<String, String> strMap = new HashMap<>();
    int i = 0;
    while(i< str.length && i +1 < str.length) {
        strMap.put(str[i],str[i+1]);
        i +=2;          
    } 

Answer 1

您无法使用简单的 str 流来完成此操作，但您可以使用索引流来模拟循环:

Map<String, String> strMap = IntStream.range(0, str.length - 1)
        .filter(i -> i % 2 == 0)
        .boxed()
        .collect(Collectors.toMap(i -> str[i], i -> str[i + 1]));