如何使用Java中的Pattern Matcher类从给定的String中找到两个或多个匹配的单词？

Question

I used below code for the matching of two words from the given string, but it's not working.

String inputText = "I want to know relating to cloud based erp services.";
Set<String> words = new HashSet<String>();
words.add("erp");
words.add("cloud");

Pattern p = Pattern.compile("erp|cloud");

Matcher m = p.matcher(inputText);
if (m.find())
{
    return m.group();
    System.out.println("Yes we providing it.");
}

Answer 1

Modify your code as :

  Pattern p = Pattern.compile("erp|cloud");

    Matcher m = p.matcher(inputText);
    String match = "";
    if (m.find())
    {
        match =  m.group();
        System.out.println("Yes we providing it.");
    }
    return match;

Answer 2

You may just check if your input contains all the strings from the hash set using a simple check: use .filter(s -> inputText.contains(s)) and then check if the filtered set size is equal to the hashset size. If yes, all the terms are present in the string:

String inputText = "I want to know relating to cloud based erp services.";
Set<String> words = new HashSet<String>();
words.add("erp");
words.add("cloud");

if (words.stream().filter(s -> inputText.contains(s)).count() == words.size()) {
    System.out.println("Yes we providing it.");
} else {
    System.out.println("No, we are not providing it.");
}

See the Java demo .