A simple Droid (robot) that can be activated, charged, and hover above ground.

Droid.java

/* A simple Droid (robot) that can be activated, charged, and hover above ground.*/

public class Droid{
  int batteryLevel;
  public Droid(){
    batteryLevel =100;
  }
  
  public void activate(){
    System.out.println("Activated. How can I help you?");
    batteryLevel-=5;
    System.out.println("Battery level is: " + batteryLevel + " percent.");
  }
  
  public void chargeBattery(int hours){
    System.out.println("Droid charging...");
    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...");
      batteryLevel-=20;
      System.out.println("Battery level is: " + batteryLevel + " percent.");
    }
    
  }
  
  public static void main(String[] args){
    Droid r2 = new Droid();
    r2.activate();
    r2.chargeBattery(5);
    r2.hover(1);
  }
  
  
}