JAva初心者ノート13継承
4184 ワード
1、Person類
2.Studioクラス
3.Teacherクラス
4.Personテスト
5.Studioテスト
6.Teacherクラステスト
package com.yfs.javase;
//
public class Person {
private String name;//
private int age;
private char sex;
private void privateMehtod() {//
System.out.println("call privateMehtod()...");
}
public Person() {
// privateMehtod();
System.out.println(" Perosn ...");
}
public Person(String name) {
this.name = name;
}
public Person(String name, int age, char sex) {
this.name = name;
this.age = age;
this.sex = sex;
}
public void introduce() {
System.out.println("I am Person....");
}
public String toString() {
return " ：" + name + " ：" + age + " ：" + sex;
}
public void speak() {
System.out.println(name + " ？");
// privateMehtod();
}
public void sleep() {
System.out.println(name + " ？");
}
public void eat() {
System.out.println(name + " ？");
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public char getSex() {
return sex;
}
public void setSex(char sex) {
this.sex = sex;
}
}
2.Studioクラス
package com.yfs.javase;
//
public class Student extends Person {// Person
private int score;
@Override
public void introduce() {
System.out.println("I am student...");
}
//
@Override
public String toString() {
return super.toString() + " ：" + score;
}
public int getScore() {
return score;
}
public void setScore(int score) {
this.score = score;
}
public Student() {//
// super();// super()
// super("Jack");
System.out.println(" Student ...");
}
//
public void study() {
// getName()
// privateMethod();
// super.toString();//
// this super
System.out.println(getName() + " ...");//
}
}
//
class YfsStudent extends Student {
}
3.Teacherクラス
package com.yfs.javase;
public class Teacher extends Person {
@Override
public void introduce(/*int a*/) {
System.out.println("I am teacher...");
}
}
4.Personテスト
package com.yfs.javase;
public class PersonTest {
public static void main(String[] args) {
Person p1 = new Person();
p1.setName(" ");
p1.setAge(20);
p1.setSex(' ');
System.out.println(p1);// toString
Student s1 = new Student();
s1.setName(" ");
s1.setAge(22);
s1.setSex(' ');
System.out.println(s1);
Teacher t1 = new Teacher();
t1.setName(" ");
t1.setAge(30);
t1.setSex(' ');
System.out.println(t1);
YfsStudent ys = new YfsStudent();
ys.setName("Tom");
System.out.println(ys);
//ys.
s1.study();
//p1.study();//
ys.study();
}
}
5.Studioテスト
package com.yfs.javase;
public class StudentTest {
public static void main(String[] args) {
//
//Student s1 = new Student("zhangsan",20,' ');
//Student s2 = new Student("lisi");
Student s3 = new Student();//
s3.setName(" ");
s3.speak();
System.out.println(s3);
s3.eat();
Teacher t1 = new Teacher();
t1.setName(" ");
t1.eat();
System.out.println(t1);
//Person p1 = new Person(" ",23,' ');
}
}
6.Teacherクラステスト
package com.yfs.javase;
public class TeacherTest {
public static void main(String[] args) {
Person p1 = new Person();
p1.setName(" ");
Student s1 = new Student();
s1.setName(" ");
Teacher t1 = new Teacher();
t1.setName(" ");
p1.introduce();
s1.introduce();
t1.introduce();
}
}