局部变量

没像你这么傻屌，试试f.SLOW

再创建个方法。返回Int ,把returned slow.

这种情况在c和c++要么define要么枚举要么static

封装个get方法？或者反射？？？

public class Fan {
final int SLOW = 1;
final int MEDIUM = 2;
final int FAST = 3;
int speed;
void setSpeed(int s) {
speed = s;
}
private String int2String(int speed) {
switch (speed) {
case SLOW:
return "SLOW";
case MEDIUM:
return "MEDIUM";
case FAST:
return "FAST";
}
return null;
}
public static void main(String[] args) {
Fan f = new Fan();
f.setSpeed(1);
System.out.println("速度为" + f.int2String(f.speed));
}
}