TestingLibs.java

import com.google.common.collect.ImmutableRangeSet;
import com.google.common.collect.Range;

public class TerstingLibs {
    private static final ImmutableRangeSet<Integer> RANGE_SET_ONE =
            ImmutableRangeSet.<Integer>builder()
                    .add(Range.closed(2, 4))
                    .add(Range.open(6, 7))
                    .add(Range.closedOpen(8, 10))
                    .add(Range.openClosed(15, 17))
                    .build();

    private static final ImmutableRangeSet<Integer> RANGE_SET_TWO =
            ImmutableRangeSet.<Integer>builder()
                    .add(Range.openClosed(0, 3))
                    .add(Range.closed(5, 8))
                    .add(Range.closedOpen(12, 15))
                    .add(Range.open(19, 20))
                    .build();

    public static void main (String[] args) {
        ImmutableRangeSet result = RANGE_SET_ONE.difference(RANGE_SET_TWO);
        System.out.println("Done!");
    }
}