1
任何人都可以诊断我面临的问题吗? 当你运行你可以看到中间部分留空演示中,我需要填补整个区域..提前java swing:多边形填充颜色问题
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Polygon;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class FillDemo
{
public static void main(String aths[])
{
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel pnl = new PolygonDemo();
pnl.setSize(100, 200);
f.getContentPane().add(pnl);
f.setSize(400,280);
f.setLocation(200,200);
f.setVisible(true);
}
}
class PolygonDemo extends JPanel
{
public PolygonDemo()
{
setBackground(Color.white);
}
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D g2 = (Graphics2D)g;
Polygon p=new Polygon();
p.addPoint(100,0);
p.addPoint(100,100);
p.addPoint(0,100);
p.addPoint(0,0);
p.addPoint(80,0);
p.addPoint(80,20);
p.addPoint(40,20);
p.addPoint(40,40);
p.addPoint(80,40);
p.addPoint(80,100);
p.addPoint(20,100);
p.addPoint(20,80);
p.addPoint(60,80);
p.addPoint(60,60);
p.addPoint(20,60);
p.addPoint(20,0);
p.addPoint(0,0);
g2.setColor(Color.BLACK);
g2.draw(p);
g2.setColor(new Color(120,250,100));
g2.fillPolygon(p);
//g2.fillPolygon(p.xpoints,p.ypoints,p.npoints);
}
}
非常感谢
感谢Nokul立即和答辩权 我可以能够与下面填写正改变 g2.fillPolygon(p.xpoints页。 ypoints中,4); \t g2.fillPolygon(p); 但现在我的画线不可见。我的意思是我可以简单地将不同的颜色应用于我的曲线,以便可以看到它? 再次感谢 – lifeline2 2010-07-30 08:46:28
尝试在调用draw之前调用fillPolygon。 – nokul 2010-07-30 09:56:33
太棒了!非常感谢你的工作。根据您的建议进行以下更改: g2.setColor(new Color(120,250,100)); \t g2.fillPolygon(p.xpoints,p.ypoints,4); \t g2.fillPolygon(p); \t g2.setColor(Color.BLACK); \t g2.draw(p); – lifeline2 2010-07-30 10:31:32