阅读以下程序并写出运行结果：

public class Reader03 {

    public static void main(String[] args) {

        Operator[] array = {new P1(), new P2(), new P3(), new P4()};

    }

}

interface Operator {

    public static final int MODE = 1;

    void play();

}

class P1 implements Operator {

    public void play() {  System.out.println("P1 Mode-" + MODE);  }

}

class P2 implements Operator {

    public static final int MODE = 2;

}

class P3 extends P1 {

    public static final int MODE = 3;

}

class P4 extends P2 {

}