Can't iterate through HttpHeaders Map

user_5407848 0
Viewed 3407

My IDE says

Error: can only iterate over an array or an instance of java.lang.Iterable

On the headers.map() in this code

import java.net.http.HttpHeaders;
import java.net.http.HttpRequest;

public static String dumpRequest(HttpRequest request)
{
    HttpHeaders headers = request.headers();
    for (Map.Entry<String, List<String>> header : headers.map()) {

    }
}

However the documentation of the map() in my IDE says it returns a Map<String, List<String>> , what am I missing ? please consider I'm very new to JAVA

I'm using JAVA 14

This is the documentation of HttpHeaders that I'm using

loops java
3 Answers

Close.

for (Map.Entry<String, List<String>> header : headers.map().entrySet())

Map itself does not extend the Iterable interface, so it can't be iterated using foreach.

user_3428520

Try this one
for java http

public static String dumpRequest(HttpRequest request) {
    HttpHeaders headers = request.headers()
    for (Map.Entry<String, List<String>> header : headers.map().entrySet()) {

    }
}

for spring framework of java in case

public static String dumpRequest(HttpRequest request) {
    HttpHeaders headers = request.getHeaders()
    for (Map.Entry<String, List<String>> header : headers.entrySet()) {

    }
}
user_75510920

Another way of spring's HttpHeaders: Simply do headers.forEach((key, value) -> {...})

user_46199580
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