Write a class named GasTank containing: An instance variable named amount of type double , initialized to 0.
LANGUAGE: JAVA
CHALLENGE:
Write a class named GasTank containing:
An instance variable named amount of type double , initialized to 0.
A method named addGas that accepts a parameter of type double . The value of the amount instance variable is increased by the value of the parameter .
A method named useGas that accepts a parameter of type double . The value of the amount instance variable is decreased by the value of the parameter . However, if the value of amount is decreased below 0, amount is set to 0.
A method named isEmpty that accepts no parameters . isEmpty returns a boolean value : true if the value of amount is less than 0.1, and false otherwise.
A method named getGasLevel that accepts no parameters . getGasLevel returns the value of the amount instance variable .
SOLUTION:
public class GasTank { private double amount = 0; public void addGas(double n1) { amount = amount + n1; } public void useGas(double n2) { if ((amount – n2) > 0 ) { amount = amount – n2; } else { amount = 0; } } public boolean isEmpty() { if (amount < 0.1) return true; else return false; } public double getGasLevel() { return amount; } }