Unused words in a given String in java OR Remove used words in a string in java

Unused words in a given String in java

SOURCE : UnusedWords.java

import java.util.ArrayList;

import java.util.HashSet;
import java.util.List;
import java.util.StringTokenizer;

public class UnusedWords {
	public static void main(String[] args) {
		String s = "To be or not to be - that is the question: Whether it is nobler in the mind to suffer, the slings and arrows of outrageous fortune. Or to take up arms against a sea of troubles, and by opposing end them";
		StringTokenizer st = new StringTokenizer(s, " ");
		List ls = new ArrayList<>();

		HashSet hst = new HashSet();
		hst.add("a");
		hst.add("be");
		hst.add("that");
		hst.add("the");
		hst.add("this");
		hst.add("or");
		hst.add("to");

		while (st.hasMoreTokens()) {
			String Currentword = st.nextToken();
			if (!hst.contains(Currentword.toLowerCase())) {

				ls.add(Currentword.toLowerCase());

			}
		}
		for (String srt : ls) {
			
			System.out.println(srt.toString());

		}
	}

}

INPUT

String s = "To be or not to be - that is the question: Whether it is nobler in the mind to suffer, the slings and arrows of outrageous fortune. Or to take up arms against a sea of troubles, and by opposing end them";

OUTPUT

not
-
is
question:
whether
it
is
nobler
in
mind
suffer,
slings
and
arrows
of
outrageous
fortune.
take
up
arms
against
sea
of
troubles,
and
by
opposing
end
them

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