1 class Cylinder {
2 private double radius;
3 private int height;
4 private double pi=3.14;
5 private String color;
6 public double setCylinder(double r,int h) {
7 radius=r;
8 height=h;
9 return r+h;
10 }
11 public void setCylinder(String str) {
12 color=str;
13 }
14 public void show() {
15 System.out.println("颜色为:"+color);
16 }
17 double area() {
18 return pi*radius*radius;
19 }
20 double volume() {
21 return area()*height;
22 }
23 }
24 public class C1_1 {
25 public static void main(String[] args) {
26 double r_h;
27 Cylinder volu=new Cylinder();
28 r_h=volu.setCylinder(2.5,5);
29 volu.setCylinder("红色");
30 System.out.println("半径和高之和="+r_h);
31 System.out.println("体积="+volu.volume());
32 volu.show();
33 }
34 }
