Question

Write a test code for this class in a same file called CarTest
Write the test code in main function

public class Car {
    public String brandName;
    public String modelName;
    public int year;
    public int maxSpeed;

    public Car(String string, String string2, int n) {
        this.brandName = string;
        this.modelName = string2;
        this.year = n;
    }

    public Car(String string, String string2, int n, int n2) {
        this.brandName = string;
        this.modelName = string2;
        this.year = n;
        this.maxSpeed = n2;
    }

    public String getBrandName() {
        return this.brandName;
    }

    public String getModelName() {
        return this.modelName;
    }

    public int getYear() {
        return this.year;
    }

    public boolean isFasterThan(Car car) {
        return this.maxSpeed >= car.maxSpeed;
    }

    public void setMaxSpeed(int n) {
        this.maxSpeed = n;
    }
}

Answer 1

Please find the code below:

CarTest.java

package classes6;

class Car {
   public String brandName;
   public String modelName;
   public int year;
   public int maxSpeed;

   public Car(String string, String string2, int n) {
       this.brandName = string;
       this.modelName = string2;
       this.year = n;
   }

   public Car(String string, String string2, int n, int n2) {
       this.brandName = string;
       this.modelName = string2;
       this.year = n;
       this.maxSpeed = n2;
   }

   public String getBrandName() {
       return this.brandName;
   }

   public String getModelName() {
       return this.modelName;
   }

   public int getYear() {
       return this.year;
   }

   public boolean isFasterThan(Car car) {
       return this.maxSpeed >= car.maxSpeed;
   }

   public void setMaxSpeed(int n) {
       this.maxSpeed = n;
   }
}

public class CarTest {
   public static void main(String[] args) {
       Car car1 = new Car("BWM", "C12345", 1993,900);
       System.out.println("Details of car1 is as below");
       System.out.println("Brand Name : "+car1.getBrandName());
       System.out.println("Model Name : "+car1.getModelName());
       System.out.println("Year : "+car1.getYear());
      
      
       Car car2 = new Car("AUDI", "P0900", 1900);
       car2.setMaxSpeed(800);
       System.out.println(" Details of car2 is as below");
       System.out.println("Brand Name : "+car2.getBrandName());
       System.out.println("Model Name : "+car2.getModelName());
       System.out.println("Year : "+car2.getYear());
      
       System.out.println(" Is car1 is faster than car 2 : "+car1.isFasterThan(car2));
       System.out.println("Setting car2 speed to 1900");
       car2.setMaxSpeed(1900);
       System.out.println("Now is car1 is faster than car 2 : "+car1.isFasterThan(car2));
      
   }
}

output: