java的静态方法和非静态方法
public class Test
{
public static void main(String[] args)
{
M m = new N();

System.out.println(m.getName());

System.out.println(m.getValue());

if(m instanceof N)
{
System.out.println("1");
}

if(m instanceof M)
{
System.out.println("2");
}
}
}

class M
{
public static String getName()
{
return "M";
}

public String getValue()
{
return "MM";
}
}

class N extends M
{
public static String getName()
{
return "N";
}

public String getValue()
{
return "NN";
}
}