toString() 메서드가있는 팬 prob

Question

팬 속도, 색상, 반지름을 변경할 수있는 프로그램을 만들고 팬을 켜고 끌 수 있는지, 팬 클래스가 잘 작동하는지 , toString() 메서드를 제외하고 테스트 프로그램에서 일부 값을 설정할 때 어떤 이유로 표준 값을 기본값으로 사용하므로 도움이 받아 들여집니다.

감사합니다.

public class Fan { 
final int SLOW = 1; 
final int MEDIUM = 2; 
final int FAST = 3; 

public int speed = SLOW; 
public boolean on = false; 
public double radius = 5; 
public String color = new String("blue"); 
//fan on 
boolean fanOn() { 
    on = true; 
    return on; 
} 
//fan off 
boolean fanOff() { 
    on = false; 
    return on; 
} 
//sets fan speed 
String setSpeed(String speed) { 
if (speed == "SLOW"){ 
    speed = String.valueOf(SLOW); 
} else if (speed == "MEDIUM") { 
    speed = String.valueOf(MEDIUM); 
} else if (speed == "FAST") { 
    speed = String.valueOf(FAST); 
} else { 
    speed = "Please enter 'SLOW', 'MEDIUM' or 'FAST' to change the speed of the fan."; 
} 
    return speed; 
} 
//sets custom radius 
double setRadius(double rad) { 
    rad = radius; 
    return rad; 
} 
//sets custom color 
String setColor(String colorType) { 
    return colorType; 
} 
//toString() method 
public String toString() { 
    return ("Speed: " + speed + "\nRadius: " + radius + "\nColor: " + "\nOn: " + on); 
} 
} 

//test program 

public class TestFan { 
public static void main(String[] args) { 
    Fan fan1 = new Fan(); 
    fan1.setColor("green"); 
    fan1.setSpeed("FAST"); 
    fan1.setRadius(3.5); 
    fan1.fanOff(); 
    System.out.println(fan1.toString()); 

} 
} 

이 그냥 출력 :

Speed: 1 
Radius: 5.0 
Color: 
On: false 

Answer 1

public class Fan { 
final int SLOW = 1; 
final int MEDIUM = 2; 
final int FAST = 3; 

public int speed = SLOW; 
public boolean on = false; 
public double radius = 5; 
public String color = new String("blue"); 
//fan on 
void fanOn() { 
    on = true; 
    return on; 
} 
//fan off 
void fanOff() { 
    on = false; 
    return on; 
} 
//sets fan speed 
void setSpeed(String speed) { 
    this.speed=speed; 
} 
//sets custom radius 
double setRadius(double rad) { 
    rad = radius; 
    return rad; 
} 
//sets custom color 
void setColor(String colorType) { 
    color = colorType; 
} 
//toString() method 
public String toString() { 
    return ("Speed: " + speed + "\nRadius: " + radius + "\nColor: " + "\nOn: " + on); 
} 
} 

//test program 

public class TestFan { 
public static void main(String[] args) { 
    Fan fan1 = new Fan(); 
    fan1.setColor("green"); 
    fan1.setSpeed("FAST"); 
    fan1.setRadius(3.5); 
    fan1.fanOff(); 
    System.out.println(fan1.toString()); 

} 
}