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Java Java Objects (Retired) Harnessing the Power of Objects Method Signatures

abhi reddy
abhi reddy
1,636 Points

public class GoKart { public static final int MAX_BARS = 8; private String mColor; private int mBarsCount;

dont understand question

GoKart.java
public class GoKart {
  public static final int MAX_BARS = 8;
  private String mColor;
  private int mBarsCount;

  public GoKart(String color) {
    mColor = color;
    mBarsCount = 0;
  }

  public String getColor() {
    return mColor;
  }

  public void drive(int laps) {
    // Other driving code omitted for clarity purposes
    mBarsCount -= laps;
  }
  public void drive() {
    // Other driving code omitted for clarity purposes
   laps -=1;
  }

  public void charge() {
    while (!isFullyCharged()) {
      mBarsCount++;
    }
  }

  public boolean isBatteryEmpty() {
    return mBarsCount == 0;
  }

  public boolean isFullyCharged() {
    return mBarsCount == MAX_BARS;
  }

}

1 Answer

andren
andren
28,558 Points

The challenge wants you to create a method called drive that takes no arguments, but performs the exact same task as calling the drive(int laps) method does with 1 as the argument.

Doing so is actually simpler than you might think, all you have to do is call the drive(int laps) method with 1 as the argument within your new drive method like this:

public void drive() {
   drive(1);
}

In Java it is completely valid to call one method from within another method, and because they have different signatures (different number and types of parameters) it won't be confused by the fact that you have two different methods called drive.