chapter08.java

适合于初学者使用的许多经典的实例

                                                   // -------------------------方法参数的传递---------------------------

class CCircle {
	     private String color;
	     private double pi=3.14159;
	     private double radius;
	     
	     public void setColor(String str) {
	         color=str;	 
	     }
	     
	     public void setRadius(double r) {
	     	 radius=r;
	     }
	     
	     public void setAll(String str,double r) {
	     	 color=str;
	     	 radius=r;
	     }
	     
	     public void show() {
	     	 System.out.println("color="+color+", Radius="+radius);
	     	 System.out.println("area="+pi*radius*radius);
	     }
}

public class Chapter08 {
         public static void main(String[] args) {
             CCircle cir01=new CCircle();
             
             cir01.setColor("RED");
             cir01.setRadius(5.0);
             cir01.show();
             
             cir01.setAll("BLUE",8.0);
             
             cir01.show();
         }
}