多态问题?
设有文件Derived.java中代码如下:
public class Base extends Object {
String objType;
public Base() {
objType = "I am a Base type";
}
}
public class Derived extends Base {
public Derived() {
objType = "I am a Derived type";
}
public static void main(String args[]) {
Derived d = newDerived();
}
}
编译程序将出现何问题?()
答案是“在第七行出错(第七行已经被我涂成红色)”
百度了很多也没能看出来是因为什么,求大佬解决一下