How to check if a word is present in a sentence using Java? [duplicate]

Answer 1

Try this solution

    int index = sent.indexOf(find);
    if (index != -1) {
        if (index == 0) {
            System.out.println("true");
        }
        else if (index + find.length() == sent.length())
        {
            System.out.println("true");
        }
        else if (sent.charAt(index - 1) == ' ' && sent.charAt(find.length() + index) == ' ') {
            System.out.println("true");
        } else {
            System.out.println("false");
        }

    } else {
        System.out.println("false");
    }

If you want something more than you original question then instead for checking for spaces you should check that they are not between 0-9 and a-Z, this should cover any characters such as comma period etc.