JAVA編程練習 創建風扇對象（開關 風速等）

自帶測試類
源代碼：

public class TestFan {
    public static void main(String[] args) {
    Fan o1=new Fan();
    Fan o2=new Fan();
    o1.setspeed(o1.FAST);
    o1.setradius(10);
    o1.setcolor("yellow");
    o1.seton(true);
    o2.setspeed(o1.MEDIUM);
    o2.setradius(5);
    o2.setcolor("blue");
    o2.seton(false);
    System.out.println(o1.toString());
    System.out.println(o2.toString());
    } 
}

class Fan{
int SLOW=1,MEDIUM=2,FAST=3;
private int speed=SLOW;
private boolean on=false;
private double radius=5;
String color="blue";
public Fan(){
}
public void setspeed(int newspeed){
speed=newspeed;
}
public void seton(boolean newon){
on=newon;
}
public void setradius(double newradius){
radius=newradius;
}
public void setcolor(String newcolor){
color=newcolor;
}
public int getspeed(){
return speed;
}
public boolean geton(){
return on;
}
public double getradius(){
return radius;
}
public String getcolor(){
return color;
}
public String toString(){
if(on){
return speed+" "+color+" "+radius;
}
else{
return "fan is off";
}
}
}

運行結果：