Error Codes Involving "'.class' and ';' Expected"

[prologik]

I am not sure how to fix this code.
https://www.codecademy.com/courses/learn-java/projects/droid

Droid.java:47: error: ‘.class’ expected
HAL.chargeBattery (int hours = 5)
^
Droid.java:47: error: ‘;’ expected
HAL.chargeBattery (int hours = 5)
^
Droid.java:48: error: ‘.class’ expected
HAL.hover (int feet = 1.5);
^
Droid.java:48: error: ‘;’ expected
HAL.hover (int feet = 1.5);
^
4 errors

```

public class Droid {

public Droid(int batteryLevel) {
  batteryLevel = 100;
}

public void activate() {
System.out.println(“Activated. How can I help you?”);
int batteryLevel = batteryLevel - 5;
System.out.println(“Battery level is: " + batteryLevel + " percent.”);
}

public void chargeBattery (int hours) {
System.out.println(“Droid charging…”);
int batteryLevel = batteryLevel + hours;

if (batteryLevel > 100) {
  batteryLevel = 100;
  System.out.println("Battery level is: " + batteryLevel + " percent.");
}

else {
  System.out.println("Battery level is: " + batteryLevel + " percent.");
}

}

public int checkBatteryLevel (){
System.out.println(“Battery level is: " + batteryLevel + " percent.”);
return batteryLevel;
}

public void hover (int feet) {
if (feet > 2) {
System.out.println(“Error! I cannot hover above 2 feet.”);
}

else {
  System.out.println("Hovering...");
  int batteryLevel = batteryLevel - 20;
  System.out.println("Battery level is: " + batteryLevel + " percent.");
}

}

public static void main(String args) {
Droid HAL = new Droid();
HAL.activate();
HAL.chargeBattery (int hours = 5)
HAL.hover (int feet = 1.5);
}
}

<do not remove the three backticks above>