有人能告诉我为什么三元运算符的这种用法不正确吗?操作数 2 和 3 返回一个布尔值。
public class Something {
...
private static final double REFERENCE_FRAME_MID_X = 0;
private static final double REFERENCE_FRAME_MID_Y = 0;
private boolean findInsideOrOutsideGeneralEllipse(Point2D destCirclePos) {
List<Boolean> returnValue = new ArrayList<>();
Point2D referenceFrameCenter = new Point2D.Double(REFERENCE_FRAME_MID_X, REFERENCE_FRAME_MID_Y);
Ellipse2D insideAreaEllipse2D = getEllipse2D(referenceFrameCenter.getX(), referenceFrameCenter.getY(),
destCirclePos.distance(referenceFrameCenter));
// doesn't work
insideAreaEllipse2D.contains(destCirclePos) ? returnValue.add(true) : returnValue.add(false);
// works
if (insideAreaEllipse2D.contains(destCirclePos)) {
returnValue.add(true);
} else {
returnValue.add(false);
}
}
...
}