What is output when the cartest application is run? why?
public class car {
private string color;
private int numwheels;
public car(string color, int numwheels) {
this. color = color;
this. numwheels = numwheels;
}
public string getcolor() {
return color;
}
public void setcolor(string color) {
this. color = color;
}
public int getnumwheels() {
return numwheels;
}
public void setnumwheels(int numwheels) {
this. numwheels = numwheels;
}
}
public class cartest {
public static void main(string[] argvs) {
cartest cartest = new cartest();
cartest. rundemo();
}
public void rundemo() {
car c = new car("blue", 4);
changecolor(c, "red");
system. out. println(c.;
}
public void changecolor(car car, string newcolor) {
car. setcolor(newcolor);
}
}
what is output when the cartest application is run? why?

red

Explanation:

public class CarTest {

public static void main(String[] argvs) {

//below line will create an object of CarTest class Object

CarTest carTest = new CarTest();

//This will call runDemo method

carTest.runDemo();

}

public void runDemo() {

//Below line will create an object of Car class  with color blue and 4 wheel

Car c = new Car("blue", 4);

//Bellow Line will change the color from blue to red, see the logic writteen in chnageColor method definition

changeColor(c, "red");

//Below line will print the color as red

System.out.println(c.getColor());

}

public void changeColor(Car car, String newColor) {

//This line will set the color as passed color in the car object

car.setColor(newColor);

}

}

answer; the correct answer is (operating system);

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