Java入门小代码之编写风扇类(包括风速,颜色等)
Java课本第十版p307 9.8
```package Java;
import java.util.Scanner;
public class Hello {
int SLOW=1,MEDIUM=2,FAST=3;
private int speed=SLOW;
private boolean on =false;
private double radius=5;
private String color="blue";
public Hello() {