public static boolean linesIntersect(Line line1, Line line2) {
if (!(line1.equals(line2))) {
double x1 = line1.getX1();
double y1 = line1.getY1();
double x2 = line1.getX2();
double y2 = line1.getY2();
double x3 = line2.getX1();
double y3 = line2.getY1();
double x4 = line2.getX2();
double y4 = line2.getY2();
return Line2D.linesIntersect(x1, y1, x2, y2, x3, y3, x4, y4);
} else {
return false;
}
}
/**
* Returns the index of the line of the loaded document corresponding to l
*
* @require l is not null
* @ensure Result is the index of the line of the loaded document corresponding to l. If the
* document contains no such line, return -1.
*/
private int getLineIndex(Line l) {
/*
* docIterator holds the document's iterator so that we may loop
* over each line in the document.
*/
Iterator<Line> docIterator = document.iterator();
/* line holds the current line in the document */
Line line;
for (int i = 0; docIterator.hasNext(); i++) {
line = docIterator.next();
if (line.equals(l)) {
return i;
}
}
return -1;
}
@Test
public void testEquals() {
final Line line1 = Line.valueOf(11, 22, 33, 44);
final Line line2 = Line.valueOf(11, 22, 33, 44);
final Line line3 = Line.valueOf(1, 2, 3, 4);
final Line nullLine = null;
assertFalse(line1.equals(nullLine));
assertFalse(line2.equals(nullLine));
assertFalse(line3.equals(nullLine));
assertFalse(line1.equals(new Object()));
assertFalse(line2.equals(new Object()));
assertFalse(line3.equals(new Object()));
assertThat(line1, equalTo(line2));
assertThat(line1, not(equalTo(line3)));
assertThat(line2, not(equalTo(line3)));
}