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

Posted by Michael Partridge
Michael Partridge
7,129 Points

Android Development Stage 2: Harnessing the Power of Objects Challenge Task 1 of 1 Does syntax matter? (Public methods)

'''javascript

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

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

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

'''

as you see, to complete the challenge I used isFullyCharged within a preceding method. In real code wouldn't this return a syntax error? Or does the fact that it's public mean it doesn't matter? Does java read code line by line top to bottom?

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() {
     while (!isFullyCharged()) {
    mBarsCount++;
     }
  }

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

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


}

1 Answer

Lee Reynolds Jr.
Lee Reynolds Jr.
5,160 Points
Lee Reynolds Jr.
Lee Reynolds Jr.
5,160 Points

In real code it would not return an error. Java does read top to bottom, left to right, but it also needs to understand whatever is going on in your code. When Java gets the the point where it sees isFullyCharged it will realize that it has no clue what that means. So it goes in search for it. Just a you when you wake up and realize that you forgot your phone, you check the immediate area(The same method[your bed]) and then you increase your search from there(the same block of code[around your bed], the class[your room], and the package[your house]). It just does this a lot faster than you could search for your phone. I hope this helped. Happy Coding :)

Michael Partridge
Michael Partridge
7,129 Points

ahh very cool thank you!