java objects

Question

Challenge Task 1 of 2
Some users of our GoKart class wrote and asked that our drive method accept a parameter to specify how many laps to go, instead of just one. It happens, well hey at least you can practice your addition and subtraction shortcuts.
Modify the drive method to define a parameter of how many laps should be driven. Update the method body to handle the new parameter.
```GoKart.java
class GoKart {
  public static final int MAX_BARS = 8;
  private String color;
  private int barCount;
  private int lapsDriven;
  public GoKart(String color) {
    this.color = color;
  }
  public String getColor() {
    return color;
  }
  public void charge() {
    barCount = MAX_BARS;
  }
  public boolean isBatteryEmpty() {
    return barCount == 0;
  }
  public boolean isFullyCharged() {
    return MAX_BARS == barCount;
  }
  public void drive() {
    lapsDriven++;
    barCount--;
  }
}
```

lloyso · Accepted Answer

My apologies I made an error in the fist code I posted  the one I posted 2nd is the correct one.

Ronaldo Cristiano · Answer

```JAVA
  class GoKart {
  public static final int MAX_BARS = 8;
  private String color;
  private int barCount;
  private int lapsDriven;
  public GoKart(String color) {
    this.color = color;
  }
  public String getColor() {
    return color;
  }
  public void charge() {
    barCount = MAX_BARS;
  }
  public boolean isBatteryEmpty() {
    return barCount == 0;
  }
  public boolean isFullyCharged() {
    return MAX_BARS == barCount;
  }
  public void drive(int lapsRemaining) {
lapsDriven += lapsRemaining;
barCount -= lapsRemaining;
  }
}
```

Emin Seçkin · Answer

public void drive(int lapsRemaining) {
lapsDriven += lapsRemaining;
barCount -= lapsRemaining;
  }
I still can't understand in drive method why lapsDriven is equal to lapsDriven + lapsRemaining.

princess mudyahoto · Answer

best answer

lloyso · Answer

//For question 2 you need to have the following:
class GoKart {
  public static final int MAX_BARS = 8;
  private String color;
  private int barCount;
  private int lapsDriven;
  public GoKart(String color) {
    this.color = color;
  }
  public String getColor() {
    return color;
  }
  public void charge() {
    barCount = MAX_BARS;
  }
  public boolean isBatteryEmpty() {
    return barCount == 0;
  }
  public boolean isFullyCharged() {
    return MAX_BARS == barCount;
  }
  public void drive(int laps) { 
lapsDriven+= laps;
barCount-= laps;
  }
  public void drive() {
   drive(1);
}
}

lloyso · Answer

public class GoKart {
  public static final int MAXBARS= 8;
  private String mColor;
 class GoKart {
  public static final int MAXBARS = 8;
  private String color;
  private int barCount;
  private int lapsDriven;
  public GoKart(String color) {
    this.color = color;
  }
  public String getColor() {
    return color;
  }
  public void charge() {
    barCount = MAX_BARS;
  }
  public boolean isBatteryEmpty() {
    return barCount == 0;
  }
  public boolean isFullyCharged() {
    return MAX_BARS == barCount;
  }
  public void drive() {
    lapsDriven++;
    barCount--;
  }
}

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princess mudyahoto

princess mudyahoto

java objects

6 Answers

lloyso

lloyso

Ronaldo Cristiano

Ronaldo Cristiano

lloyso

lloyso

lloyso

lloyso

lloyso

lloyso

princess mudyahoto

princess mudyahoto

princess mudyahoto

princess mudyahoto

Emin Seçkin

Emin Seçkin