class father
{
private String name;
father(String name)
{
this.name=name;
}
public String get_name()
{
return this.name;
}
}
class son extends father
{
private String name;
son(String name)
{
super(name);
}
public String get_name()
{
return this.name;
}
}
public class TestDemo {
public static void main(String[] args)
{
son s=new son("son");
System.out.println(s.get_name());
}
}
运算结果:null