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有一個空心的Java.awt.geom.Area
,我怎樣才能得到該區域的輪廓? 例如獲取一個區域的輪廓
Ellipse2D shape1 = new Ellipse2D.Double (20, 20, 160, 160);
Ellipse2D shape2 = new Ellipse2D.Double (60, 60, 80, 80);
Area area = new Area(shape1);
area.subtract(new Area(shape2));