24.下面程序运行的结果是 public class Teacher extends Person { private String name = "tom"; public Teacher0f System.out.printin("This is a teacher.") super0;

程序会报错，因为 Teacher 类中的构造方法没有被定义。正确的代码应该是：

public class Teacher extends Person {
private String name = "tom";

public Teacher() {
System.out.println("This is a teacher.");
super();
}
}

这样就可以正确地输出"This is a teacher."了。