尚学堂离得一个程序,自己新手搞不定,希望高手能帮忙解决一下,先谢谢各位了!
运行说:找不到符号
符号:方法info()
。程序:
class Person{
private String name;
private String location;
Person(String name){
this.name = name;
location ="beijing";
}
Person(String name,String location){
this.name = name;
this.location = location;
}
public String info(){
return "name: "+name+
" location: "+location;
}
}class Teacher extends Person{
private String capital;
Teacher(String name, String capital){
this(name,"beijing",capital);
}
Teacher(String n,String l,String capital){
super(n,l);
this.capital = capital;
}
public String info(){
return super.info() + "capital" +capital;
}
}
class Student extends Person{
private String school;
Student(String name,String school){
this(name,"beijing",school);
}
Student(String n,String l,String school){
super(n,l);
this.school = school;
}
public String info(){
return super.info()+"school: "+school;
}
}public class TestTeacher{
public static void main (String [] args){
Person p1 = new Person("A");
Person p2 = new Person("B","shanghai");
Student s1 = new Person("c",s1);
Student s2 = new Person("c","shanghai","s2");
System.out.println(p1,info());
System.out.println(p2,info());
System.out.println(s1,info());
System.out.println(s2,info());
Teacher t1 = new Teacher("d","Professor");
System.out.println(t1,info());
}
}
运行说:找不到符号
符号:方法info()
。程序:
class Person{
private String name;
private String location;
Person(String name){
this.name = name;
location ="beijing";
}
Person(String name,String location){
this.name = name;
this.location = location;
}
public String info(){
return "name: "+name+
" location: "+location;
}
}class Teacher extends Person{
private String capital;
Teacher(String name, String capital){
this(name,"beijing",capital);
}
Teacher(String n,String l,String capital){
super(n,l);
this.capital = capital;
}
public String info(){
return super.info() + "capital" +capital;
}
}
class Student extends Person{
private String school;
Student(String name,String school){
this(name,"beijing",school);
}
Student(String n,String l,String school){
super(n,l);
this.school = school;
}
public String info(){
return super.info()+"school: "+school;
}
}public class TestTeacher{
public static void main (String [] args){
Person p1 = new Person("A");
Person p2 = new Person("B","shanghai");
Student s1 = new Person("c",s1);
Student s2 = new Person("c","shanghai","s2");
System.out.println(p1,info());
System.out.println(p2,info());
System.out.println(s1,info());
System.out.println(s2,info());
Teacher t1 = new Teacher("d","Professor");
System.out.println(t1,info());
}
}
public class TestTeacher {
public static void main(String[] args) { Person p1 = new Person("A");
Person p2 = new Person("B", "shanghai");
Student s1 = new Student("c", "s1");
Student s2 = new Student("c", "shanghai", "s2"); System.out.println(p1.info());
System.out.println(p2.info());
System.out.println(s1.info());
System.out.println(s2.info()); Teacher t1 = new Teacher("d", "Professor");
System.out.println(t1.info());
}
}
Student是Person的子类
Student s2 = new Person("c","shanghai","s2");//Person类改成Studentprintln(p1,info());//是p1.info()不是逗号,是点,下面一样
class Person {
private String name;
private String location; Person(String name) {
this.name = name;
location = "beijing";
} Person(String name, String location) {
this.name = name;
this.location = location;
} public String info() {
return "name: " + name + " location: " + location;
}
}class Teacher extends Person {
private String capital; Teacher(String name, String capital) {
this(name, "beijing", capital);
} Teacher(String n, String l, String capital) {
super(n, l);
this.capital = capital;
} public String info() {
return super.info() + "capital" + capital;
}}class Student extends Person {
private String school; Student(String name, String school) {
this(name, "beijing", school);
} Student(String n, String l, String school) {
super(n, l);
this.school = school;
} public String info() {
return super.info() + "school: " + school;
}
}public class TestTeacher {
public static void main(String[] args) { Person p1 = new Person("A");
Person p2 = new Person("B", "shanghai");
Student s1 = new Student("c", "s1");
Student s2 = new Student("c", "shanghai", "s2"); System.out.println(p1.info());
System.out.println(p2.info());
System.out.println(s1.info());
System.out.println(s2.info()); Teacher t1 = new Teacher("d", "Professor");
System.out.println(t1.info());
}
}