j6_01.java

石志国著《JSP应用教程》

package Bean;
import java.io.*;
public class j6_01 { 
	int radius;
	public j6_01()  { 
		radius=1;
	}
	public int getRadius(){
		return radius;
	}
	public void setRadius(int newRadius){
		radius=newRadius;
	}
	public double circleArea() {
		return Math.PI*radius*radius;
	}
	public double circlLength(){
		return 2.0*Math.PI*radius;
	}
}