I have a list of Strings and a String. If the String has any of the lists then I need to remove it.
I'm using the below approach and its working fine. I'm just wondering if this can be replaced using Stream API?
List<String> exclude = getExcludeList();
String phrase = "My test phrase";
for (String str: exclude) {
phrase = phrase.replace(str, "");
}
You could form a regex alternation consisting of the strings in the list, then do a regex replacement to remove them from the phrase:
List<String> exclude = getExcludeList();
String phrase = "My test phrase";
String regex = exclude.stream().collect(Collectors.joining("|", "\\b(?:", ")\\b"));
phrase = phrase.replaceAll(regex, "");
.map(Pattern::quote). Best answer so far, may even have significant performance advantages for a large number of exclude strings. However, it must be mentioned that it does not have the same semantic, though, in most cases the semantic of this solution is preferable.This will be kind of ugly since you want to modify a non-stream variable inside a stream and stream can only access effectively final variables from outside of their scope.
But it's doable:
String[] holder = new String[] {phrase};
exclude.stream().foreach(s -> phrase[0] = phrase[0].replace(s, "");
In the "Streamy"-Way of Java 8 the best way is to use an reducing Collector:
String phrase = getExcludeList().stream()
.collect(Collectors.reducing(
"My test phrase",
(ph, t) -> ph.replace(t, "")
));
