MPlayer.java

class MPlayer extends Player {

    MPlayer(String name) { super(name); }
    
    // ------------------------------------------------------------------

    private IDisplay io;

    public void registerDisplay(IDisplay d) {
		this.io = d; 
    }

    public void inform(String msg) {
		io.msgDisplay(msg);
    }

    public void turn(Turn t) {
		io.msgDisplay("It's your turn.");

		if (sum >= 19) {
			t.hold();
		} else if (sum < 19) {
			sum += t.roll();
		}

		io.sumDisplay(sum);

		if (sum <= 21) {
			io.msgDisplay("Turn's up");
		} else {
			io.msgDisplay("Oops, you risked all and lost. Bust!");
		}
    }

    // ------------------------------------------------------------------
    // Examples: 

    static MPlayer m1;
    static SPlayer s1;
    static Turn t1; 
    static Turn t2; 

    public static void createExamples() {
		if (m1 == null) {
			m1 = new MPlayer("test1");    
			s1 = new SPlayer(m1);         
			t1 = new Turn(s1, new Die()); 
			t2 = new Turn(s1, new Die());
		}
    }

   
    // ------------------------------------------------------------------
    // Tests: 

    public static void main(String argv[]) {
		m1.registerDisplay(TestIDisplay.testIDisplay); 

		m1.inform("welcome to player 1");
		
		m1.turn(t1);
		Tester.check(!s1.done, "turn 1");
		
		m1.sum = 20; 
		m1.turn(t2); 
		Tester.check(s1.done, "turn 2");

		m1.turn(t2);
		Tester.check(s1.done, "cheat 3"); 
		Tester.check(s1.sum == 0, "cheat 4"); 
    }
}