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Java Java Objects (Retired) Harnessing the Power of Objects Incrementing

Paul Taylor
Paul Taylor
2,213 Points
Posted by Paul Taylor
Paul Taylor
2,213 Points

++ worked in this exercise

curious to know why did this work within the console ++, which I thought would just add to the program for example : while (!isFullyCharged) { wouldn't this mean whatever the mBarsCount++; } mBarsCount is times 2, but its value is 0zero.

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

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

  public String getColor() {
    return mColor;
  }

  public void charge() {
    mBarsCount = MAX_ENERGY_BARS;
  }

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

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

}

1 Answer

Kourosh Raeen
Kourosh Raeen
23,733 Points
Kourosh Raeen
Kourosh Raeen
23,733 Points

mBarsCount++ increments the value of mBarsCount by one. It does not multiply it by 2. It is basically equivalent to:

mBarsCount = mBarsCount + 1;