Java多态

class fu
{
int num = 3;
void show(){
System.out.println("fu show");
}
static void run()
{
System.out.println("fu run");
}
}

class zi extends fu
{
int num = 4;
void show()
{
System.out.println("zi show");
}
static void run()
{
System.out.println("zi run");

90d8
}
}
class  DuoTaiDemo2
{
public static void main(String[] args)
{
fu a = new zi();
a.show();
a.run();
System.out.println(a.num);
}
}