java多边形填充问题

Question

java的fillpolygon的填充规则是奇偶性原则，能否忽略这个原则？例如我要把一张图片里面的多边形区域去除，如果两个多边形之间有交集，则交集的部分不会被去除，有什么方法呢？

Answer 1

GeneralPath p = new GeneralPath(GeneralPath.WIND_NON_ZERO);//无奇偶性
        p.moveTo(0.0f, 0.0f);
        p.lineTo(w*.5f, 0.0f);
        p.lineTo(w*.5f, h*.2f);
        p.lineTo(0.0f, h*.2f);
        p.closePath();        p.moveTo(w*.05f, h*.05f);
        p.lineTo(w*.55f, h*.05f);
        p.lineTo(w*.55f, h*.25f);
        p.lineTo(w*.05f, h*.25f);
        p.closePath();        g2.setColor(LIGHT_GRAY);
        g2.fill(p);
        g2.setColor(BLACK);
        g2.drawString("NON_ZERO rule", 0, -5);
        g2.translate(0.0f, h*.45);        p.setWindingRule(GeneralPath.WIND_EVEN_ODD); //设置奇偶性为打开
        g2.setColor(LIGHT_GRAY);
        g2.fill(p);
        g2.drawString("EVEN_ODD rule", 0, -5);