我有一个小问题..我实际上在java中做一个程序(它是一个GUI)。 有一个名为Map的类,我在其中创建了一个地图..(或至少我正在尝试)。构造函数初始化地图并返回一个区域,然后在View类中绘制它。我尝试用g2.fillPolygon(x [],y [],n)来实现它的经典方法,但它不起作用。这是源代码:
public class Map{
Area area;
//...
public Map(){
this.area=new Area(new Polygon(
arrayX(),//ArrayY() and arrayX() are methods that generate arrays with random numbers
arrayY(),
MAX
));
}
//...stuff
}
以下是View类:
public class View extends JComponent{
Map map=new Map();
//...stuff
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
//.......
g2.draw(map.area);//this draws the normal polygon NOT filled
g2.fillPolygon(map.ArrayX,map.arrayY,map.MAX);//this might fill the polygon but it does noot
g2.fillPolygon(map.area);//this does not work (ofcourse) because it wants a Polygon type parameter. I tried to cast it but it still does not work.
}
}
在这种情况下我该怎么办? 非常感谢你。
答案 0 :(得分:2)
与Graphics2D#draw(Shape)
方法一样,有Graphics2D#fill(shape)
方法。
g2.setColor(Color.BLUE);
g2.fill(map.area);
g2.setColor(Color.RED);
g2.draw(map.area);
您可能希望查看2D Graphics了解更多详情