请写出以下程序运行后的结果：

class P2_3 {

    static int n1=9;

    public static void display() {

        byte n2=127;

        System.out.println("n2="+n2);

    }

    public static void main(String args[]) {

        int n3;

        n3=n1+2;

        System.out.println("n1="+n1);

        System.out.println("n3="+n3);

        display();

    }

}