[Windows10][jdk15] 객체 지향 프로그래밍(OOP) Java 실습 07 - 동전던지기

 

 [ 작업 환경 ]

 

Windows10

jdk-15

 

 

 

 

 

1. Coin 객체 생성

 

// Coin.java

public class Coin {
    
    private final int HEADS = 1;
    private int face;

    public Coin() {
        flip();
    }

    public void flip() {
        face = (int)(Math.random() * 2);
    }

    public boolean isHeads() {
        return (face == HEADS);
    }

    public String toString() {
        return (face==HEADS) ? "Heads" : "Tails";
    }
}

 

 

 

 

 

2. 동전 뒤집기

 

// CountFlips.java

public class CountFlips {
    public static void main (String[] args) {
        final int FLIPS = 1000;
        int heads = 0, tails = 0;

        Coin myCoin = new Coin();

        for (int count = 1; count <= FLIPS; count++) {
            myCoin.flip();

            if (myCoin.isHeads()) {
                heads ++;
            }
            else {
                tails ++;
            }
        }

        System.out.println("Number of flips : " + FLIPS);
        System.out.println("Number of heads : " + heads);
        System.out.println("Number of tails : " + tails);
    }
}

 

 

 

 

 

3. 컴파일 및 실행

 

javac Coin.java
javac CountFlips.java
java CountFlips