자바 클래스 구현

Car.java

package kr.duru.code;

/**
 * Created by duru on 2016. 4. 17..
 */
public class Car {
    public Car() {

    }
    int speed;
    int distance;
    String color;

    public void speedUp()
    {
        System.out.println("Speed Up +5");
        speed = speed + 5;
    }

    public void breakDown()
    {
        System.out.println("Break down -10");
        speed = speed - 10;
    }

    public int getCurruntSpeed()
    {
        System.out.println("current speed");
        return speed;
    }

}

Main.java

package kr.duru.code;

public class Main {

    public static void main(String[] args) {
	// write your code here
        Car dogCar = new Car();
        dogCar.speedUp();
        dogCar.speedUp();

        Car cowCar = new Car();
        cowCar.breakDown();

        //http://stackoverflow.com/questions/5071040/java-convert-integer-to-string

        /**
         * 자바에서 형변환
         */

        System.out.println("현재 속도 dogCar : " + Integer.toString(dogCar.getCurruntSpeed()));
        System.out.println("현재 속도 cowCar : " + Integer.toString(cowCar.getCurruntSpeed()));

        System.out.println("현재 속도 " + String.valueOf(cowCar.getCurruntSpeed()));
        System.out.println("Current Speed dogCar : " + dogCar.getCurruntSpeed());
    }
}