Write a class named GasTank containing: An instance variable named amount of typ

Question

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 . A method named getGasLevel that accepts no parameters . getGasLevel returns the value of the amount instance variable .

Explanation / Answer

class GasTank
{
   double amount;
   GasTank()
   {
       amount=0;
   }

   void addGas(double a)
   {
       amount=amount+a;
   }
   void useGas(double a)
   {
       amount=amount-a;
   }
   double getGasLevel()
   {
       return amount;
   }
}

class gas
{
   public static void main(String args[])
   {
       GasTank o = new GasTank();
       o.addGas(10);
       o.useGas(5);
       double ans =o.getGasLevel();
       System.out.println("Balance Amount =

"+ans);
}
}

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