drawcircle.java

JDBC技术,通过JDBC驱动程序建立与数据库的链接

import java.awt.Graphics; 
import java.awt.Color;
import java.applet.Applet;

public class drawcircle extends Applet //随机产生颜色,并画圆
{
  public void paint(Graphics g) 
  {
    int red,green,blue,x;
    for (x=0;x<370;x+=30)
    {
      red=(int)Math.floor(Math.random()*256);
      green=(int)Math.floor(Math.random()*256);
      blue=(int)Math.floor(Math.random()*256);
      g.setColor(new Color(red,green,blue));
      g.fillOval(x,0,30,30);	
     }
  }
}