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stevenmcnitt
9,437 PointsHarnessing the Power of Objects- helper method
I would like to run this method with an if statement however I get this error..
./GoKart.java:24: error: incompatible types if(MAX_BARS) { ^ required: boolean found: int 1 error
How can I make my 'if' statement compatible with a boolean so this code will run???
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 charge() {
mBarsCount = MAX_BARS;
}
public boolean isBatteryEmpty() {
return mBarsCount == 0;
}
public boolean isFullyCharged() {
if(MAX_BARS) {
return true;
}
}
}
2 Answers
Jess Sanders
12,086 PointsUse the following snippet of code as your example to follow in changing the implementation details of the charge method:
public boolean dispense() {
boolean wasDispensed = false;
if (!isEmpty()) {
mPezCount--;
wasDispensed = true;
}
return wasDispensed;
}
- Instead of if, use while
- increment, rather than decrement
- The charge method doesn't need to return a boolean, so ignore all of the code involving the boolean wasDispensed
Keep isFullyCharged as it was from the previous challenge.
public boolean isFullyCharged() {
return mBarsCount == MAX_ENERGY_BARS;
}
Ken Alger
Treehouse TeacherSteven;
As you figured out, Java is expecting a Boolean value in the if condition and you are passing it an integer value.
One way to solve this for this code example would be to check if MAX_BARS is equal to mBarsCount in the if condition. That would generate a true/false condition, correct?
Happy coding,
Ken
stevenmcnitt
9,437 PointsThanks Ken! Would it also be possible to initialize MAX_BARS to a boolean value just before my isFullyCharged method and then run the code by passing the newly initialized MAX_BARS to my 'if' condition?
I suppose it is a matter of scope as well; for example, could run the following:
someIntVar = 0; // initialize to int data type
public boolean someBoolVar() { boolean newDataType = someIntVar //change data type from int to bool if(newDataType) { //passes bool data type to bool method? return true; }else{ return false; }
}
Or is it not possible to change data types through variable assignment this way? If not, perhaps java already has a method for this I haven't learned yet? Just some thoughts..
Ken Alger
Treehouse TeacherSteven;
I see what you are getting at, but I am having difficulty understanding why you would do that in this case as it seems much simpler to pass the if conditional the check for equality of MAX_BARS versus mBarsCount. Seems much easier and less code to write than creating a bunch of intermediary variables.
In terms of converting a Boolean value to an Integer, take a look at this post or this one.
Post back if this is not what you are talking about.
Ken