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Gary Burnaska
541 Pointsim getting compiler errors out the end, what I am I doing wrong?
Okay, so let's use our new isFullyCharged helper method to change our implementation details of the charge method. Let's make it so it will only charge until the battery reports being fully charged.
Let's use the ! symbol and a while loop. Inside the loop increment mBarsCount.
What am I doing wrong here?
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 void charge() { mBarsCount = MAX_ENERGY_BARS; }
public boolean isBatteryEmpty() { return mBarsCount == 0; }
public boolean isFullyCharged() { return mBarsCount == MAX_ENERGY_BARS; }
}
3 Answers
George Pirchalaishvili
3,747 PointsI think the problem is that you missed 1 "}" in your code. Try this
public void charge() {
while (!isFullyCharged()) {
mBarsCount++;
}
}
Gary Burnaska
541 Pointsthese are the errors im getting
./GoKart.java:24: error: illegal start of expression public void charge() { ^ ./GoKart.java:24: error: illegal start of expression public void charge() { ^ ./GoKart.java:24: error: ';' expected public void charge() { ^ ./GoKart.java:29: error: illegal start of expression public boolean isBatteryEmpty() { ^ ./GoKart.java:29: error: ';' expected public boolean isBatteryEmpty() { ^ ./GoKart.java:34: error: illegal start of expression public boolean isFullyCharged() { ^ ./GoKart.java:34: error: ';' expected public boolean isFullyCharged() { ^ ./GoKart.java:38: error: reached end of file while parsing } ^ JavaTester.java:71: error: cannot find symbol if (!kart.isBatteryEmpty() || kart.isFullyCharged()) { ^ symbol: method isBatteryEmpty() location: variable kart of type GoKart JavaTester.java:71: error: cannot find symbol if (!kart.isBatteryEmpty() || kart.isFullyCharged()) { ^ symbol: method isFullyCharged() location: variable kart of type GoKart JavaTester.java:76: error: cannot find symbol if (!kart.isFullyCharged()) { ^ symbol: method isFullyCharged() location: variable kart of type GoKart ./GoKart.java:18: error: cannot find symbol while (!isFullyCharged()) { ^ symbol: method isFullyCharged() location: class GoKart ./GoKart.java:30: error: incompatible types: unexpected return value return mBarsCount == 0; ^ ./GoKart.java:35: error: incompatible types: unexpected return value return mBarsCount == MAX_ENERGY_BARS; ^ 14 errors
Gary Burnaska
541 Pointsnow im just getting this
/GoKart.java:25: error: method charge() is already defined in class GoKart public void charge() {
George Pirchalaishvili
3,747 Pointsbecause you forgot to delete your old charge() method :)