I wish to limit the input of an integer value, between certain values using a while loop, with a couple of if-else if-else statements inside it! It's kinda working, but not exactly as it should... thought of using a switch as well, but I'm too "green" to know how! If someone's up for it and knows how... I'd welcome the use of a switch as well! Even a nested switch if need be... Here's my code:
public class OOPProject {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
Scanner sc = new Scanner(System.in);
Car Honda = new Car(2018, 20000, "Honda", "Civic", 200, 6, 0, 0);
System.out.println("Manufacturer is: " + Honda.maker + ", model: " + Honda.model +
", year of fabrication: " + Honda.year + ", price: " + Honda.price + "!");
System.out.println("Please start the engine of your vehicle, by typing in 'Yes' or 'Start' or 'Turn on'!");
System.out.print("Do you wish to start the engine?");
System.out.println(" ");
Honda.StartEngine(sc);
//System.out.println("Engine is on!");
System.out.println("Do you wish to depart? Shift in to the first gear then and accelerate!");
System.out.println("Type in the speed: ");
Honda.accelerate(sc);
System.out.println("We are departing! Shifting in to " + Honda.currentGear +
"st gear and accelerating to " + Honda.currentSpeed + " km per hour!");
}
Constructor & functions:
public class Car {
public int year;
public int price;
public String maker;
public String model;
public int maximumSpeed;
public int numberOfGears;
public int currentSpeed;
public int currentGear;
public boolean isEngineOn;
public Car(int year, int price, String maker, String model, int maximumSpeed,
int numberOfGears, int currentSpeed, int currentGear) {
this.year = year;
this.price = price;
this.maker = maker;
this.model = model;
this.maximumSpeed = maximumSpeed;
this.numberOfGears = numberOfGears;
this.currentSpeed = currentSpeed;
this.currentGear = currentGear;
}
public String StartEngine(Scanner in) {
while(in.hasNext()) {
String input = in.nextLine();
if(input.equals("Yes") || input.equals("Start") || input.equals("Turn on")) {
isEngineOn = true;
System.out.println("Engine is on!");
return input;
} else {
System.out.println("Your input is not correct! Please start the engine!");
}
}
return null;
}
public int accelerate(Scanner in){
while(in.hasNextInt()){
currentSpeed = in.nextInt();
if(isEngineOn && currentSpeed > 0){
currentGear++;
} else if(currentSpeed > 50){
System.out.println("We cannot accelerate to more than 50 km per hour, when shifting in the 1st gear!");
} else{
System.out.println("We cannot depart at 0 km per hour!");
}
}
return 0;
}
}
It's taking the input, but it's not going further with it as it should, neither does it give an error message or stop the app, what's my mistake?