Span implements Comparable<Span> { public boolean startsWith(Span s) { return getStart() == s.getStart() && contains(s); } Span(int s, int e, String type);  Span(int s, int e);  Span(Span span, int offset); int getStart(); int getEnd(); String getType(); int length(); boolean contains(Span s); boolean contains(int index); boolean startsWith(Span s); boolean intersects(Span s); boolean crosses(Span s); CharSequence getCoveredText(CharSequence text); int compareTo(Span s); @Override int hashCode(); @Override boolean equals(Object o); @Override String toString(); static String[] spansToStrings(Span[] spans, CharSequence s); static String[] spansToStrings(Span[] spans, String[] tokens);  }
@Test public void testStartsWith() { Span a = new Span(10, 50); Span b = new Span(10, 12); assertTrue(a.startsWith(a)); assertTrue(a.startsWith(b)); assertFalse(b.startsWith(a)); }