System.out.println(p1.info());这条语句貌似应该写在方法中，不能直接用，仅供参考。public class TestInherit {
public static void main (String [] args ) {//在这里加个方法试试
Person p1 = new Person("A");
Person p2 = new Person("B", "shanghai");
Student s1 = new Student("C", "S1");
Student...
