circle.java

自制小画板！为JBUILDER版本。相当具有参考价值

package drawingpanel;
import java.awt.*;		//导入awt的类
import java.awt.geom.*;		//导入awt的geom类
/**圆类**/
	class Circle 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
			g2d.drawOval(Math.min(x1,x2),Math.min(y1,y2),Math.max(Math.abs(x1-x2),Math.abs(y1-y2)),Math.max(Math.abs(x1-x2),Math.abs(y1-y2)));
		}											//画圆形
	}