给出以下代码，请问该程序的运行结果是什么？如有问题，请说明原因。

class SuperEx {

String s = "父类成员变量";

public void method(){

System.out.println("SupMethod");

}

}

class SubEx extends SuperEx {

String s = "子类成员变量";

public void method(){

System.out.println("SubMethod");

}

}

class Demo {

public static void main (String[] args) {

SuperEx sup = getInstance();

System.out.println(sup.s);

function( sup );

}

public static SuperEx getInstance(){

return new SubEx ();  

}

public static void function (SuperEx sup) {

sup.method();

}

}

给出以下代码，请问该程序的运行结果是什么？如有问题，请说明原因。

class SuperEx {

String s = "父类成员变量";

public void method(){

System.out.println("SupMethod");

}

}

class SubEx extends SuperEx {

String s = "子类成员变量";

public void method(){

System.out.println("SubMethod");

}

}

class Demo {

public static void main (String[] args) {

SuperEx sup = getInstance();

System.out.println(sup.s);

function( sup );

}

public static SuperEx getInstance(){

return new SubEx ();  

}

public static void function (SuperEx sup) {

sup.method();

}

}