Java程序（硬币翻转模拟）

Question

这是FlipRace程序的代码，它启动两个硬币之间的竞赛。 GOAL是全局声明的变量。无论哪个硬币达到目标头数最快的胜利。下面是Coin类的代码。

我的问题是，如果我把GOAL = 3，那么哪个硬币获得3个最快的胜利，它就可以了。当我设置GOAL = 4时，仍然可以正常工作。但是一旦我把GOAL＆gt; 4.假设我把GOAL = 7，最后的结果仍然只有当一枚硬币已注册4个头而不是7时。

// FlipRace.java
package nisarg;

public class FlipRace {
    public static void main(String[] args){
        final int GOAL = 6;
        int count1=0,count2=0;
        Coin myCoin1 = new Coin();
        Coin myCoin2 = new Coin();
        while(count1 < GOAL && count2 < GOAL){
            myCoin1.Flip();
            myCoin2.Flip();
            System.out.print("Coin1 : " +myCoin1 +"\t");
            System.out.println("Coin2 :"+myCoin2);
            count1 = (myCoin1.isHeads())? count1+1 : 0;
            count2 = (myCoin2.isHeads())? count2+1 : 0;
        }
        if(count2 < GOAL) {
            System.out.println("Coin1 wins!!");
        }   else if(count1 < GOAL){
                System.out.println("Coin2 wins!!");
        }
        else {
            System.out.println("Its a tie!!");
        }
    }
}

// Coin.java
package nisarg;
import java.util.Random;

public class Coin {
    private final int HEADS = 1;
    private final int TAILS = 0;
    private int face;

    public Coin(){
        Flip();
    }
    public void Flip(){
        face = (int)(Math.random()*2); 
    }
    public boolean isHeads(){
        return(face == HEADS);
    }
    public String toString(){
        String faceName;
        if(face == HEADS){
            faceName = "H";
        }
        else {
            faceName = "T";
        }
        return faceName;
    }
}