polygon1.java~1~

自制小画板！为JBUILDER版本。相当具有参考价值

package drwawing;
import java.awt.*;		//导入awt的类
import java.awt.geom.*;		//导入awt的geom类
/**三角形类**/
	class Polygon1 extends drawings{
		void draw(Graphics2D g2d){					//用图形图像处理工具
			g2d.setPaint(new Color(R,G,B));			//设置画笔颜色
			g2d.setStroke(new BasicStroke(stroke));	//设置绘画风格为基本型
			int x[]=new int[3],y[]=new int[3];
			x[0]=Math.abs((x1-x2)/2+Math.min(x1,x2));
			x[1]=x1;x[2]=x2;y[0]=y1;y[1]=y2;y[2]=y2;
			g2d.drawPolygon(x,y,3);					//画三角形
			//g2d.drawLine(x1,y2,x2,y2);
			//g2d.drawLine(x1,y2,((x2-x1)/2+x1),y1);
			//g2d.drawLine(x2,y2,((x2-x1)/2+x1),y1);
		}
	}