java小问题:如何建立一个point类输出正方形四个顶点坐标.一个正方形和长方形继承了矩形,然后算面积和输出顶点坐标.本来我想直接在point类中设置p1x=0,p1y=0,p2x=Quadrilateral.wid.可是系统报错说
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![java小问题:如何建立一个point类输出正方形四个顶点坐标.一个正方形和长方形继承了矩形,然后算面积和输出顶点坐标.本来我想直接在point类中设置p1x=0,p1y=0,p2x=Quadrilateral.wid.可是系统报错说](/uploads/image/z/9288076-4-6.jpg?t=java%E5%B0%8F%E9%97%AE%E9%A2%98%EF%BC%9A%E5%A6%82%E4%BD%95%E5%BB%BA%E7%AB%8B%E4%B8%80%E4%B8%AApoint%E7%B1%BB%E8%BE%93%E5%87%BA%E6%AD%A3%E6%96%B9%E5%BD%A2%E5%9B%9B%E4%B8%AA%E9%A1%B6%E7%82%B9%E5%9D%90%E6%A0%87.%E4%B8%80%E4%B8%AA%E6%AD%A3%E6%96%B9%E5%BD%A2%E5%92%8C%E9%95%BF%E6%96%B9%E5%BD%A2%E7%BB%A7%E6%89%BF%E4%BA%86%E7%9F%A9%E5%BD%A2%2C%E7%84%B6%E5%90%8E%E7%AE%97%E9%9D%A2%E7%A7%AF%E5%92%8C%E8%BE%93%E5%87%BA%E9%A1%B6%E7%82%B9%E5%9D%90%E6%A0%87.%E6%9C%AC%E6%9D%A5%E6%88%91%E6%83%B3%E7%9B%B4%E6%8E%A5%E5%9C%A8point%E7%B1%BB%E4%B8%AD%E8%AE%BE%E7%BD%AEp1x%3D0%2Cp1y%3D0%2Cp2x%3DQuadrilateral.wid.%E5%8F%AF%E6%98%AF%E7%B3%BB%E7%BB%9F%E6%8A%A5%E9%94%99%E8%AF%B4)
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