java筆記 day09 抽象類（二）

2 案例概述：

abstract class teacher

public
teacher(string name,int age)
//get***() and set***()
public string getname()
public
void
setname(string name)
public
intgetage()
public
void
setage(int age)
public
void
show()
//abstract class
public
abstract
void
teach();
}class basicteacher extends teacher
public
void
teach()
}class experimentteacher extends teacher
public
experimentteacher(string name,int age)
public
void
teach()
}class abstractdemo2}/*
running result:
the teacher's name is liu shishi
the teacher's age is 27
basicteacher teaches basic knowledge.
the teacher's name is tangwei
the teacher's age is 28
experimentteacher teaches experiments.
*/

abstract class student

public
student(string name,int age,int sclass)
//get***() and set***()
public string getname()
public
void
setname(string name)
public
intgetage()
public
void
setage(int age)
public
intgetsclass()
public
void
setsclass(int sclass)
public
void
show()
public
abstract
void
learn();
}class basicstudent extends student
public
basicstudent(string name,int age,int sclass)
public
void
learn()
}class experimentstudent extends student
public
experimentstudent(string name,int age,int scalss)
public
void
learn()
}class abstractdemo3}/*
running result:
the student's name is hu ge,age is 22,and class is 1
basicstudents learn basic knowledge.
the student's name is huo gianhua,age is 23,and class is 2
experimentstudents learn experiment knowledge.
*/

**demo：

abstract class employee

public
employee(string name,string id,int wage) 
//get*** and set***
public string getname()
public
void
setname(string name)
public string getid()
public
void
setid(string id)
public
intgetwage()
public
void
setwage(int wage)
//abstract class
public
abstract
void
work();
}class programmer extends employee
public
programmer(string name,string id,int wage)
public
void
work()
}class manager extends employee
public
manager(string name,string id,int wage,int bonus)
public
intgetbonus()
public
void
setbonus(int bonus)
public
void
bonus()
public
void
work()
}class abstractdemo4}/*
running result:
xu zj6666666 10000
programmer work.
john zj233333 111111
programmer work.
liu shishi zj999999 15000 120000
manager manages.
*/

day09 繼承 super this 抽象類

子父類 現了同名的成員變數時，在子類中需要訪問父類中非私有成員變數時，需要使用 super 關鍵字，修飾父類成員變數，類似於之前學過的 this class father class sonextends father class extendsdemo03 演示結果 fu num 6zi num ...

前端筆記day09

1 完 員列表的刪除功能 姓名姓別 刪除 2 vue的v for語法可以遍歷那些值，分別寫出遍歷不同值的 1 迭代數字 這是第 個p標籤 2 迭代data中的普通物件 3 迭代data中的陣列 3 文字敘述v model和v bind的差別 1 v bind動態繫結指令，預設情況下標籤自帶屬性的值是...

Day09 多型 抽象方法 藉口

今天的內容是基礎班中的乙個重點。多型知識點1.多型的三個前提 繼承關係，方法重寫，父類引用指向子類物件。知識點2 成員變數在多型中 編譯看左邊，執行看左邊。成員方法在多型中 編譯看左邊，執行看右邊。靜態方法在多型中 編譯看左邊，執行看右邊。知識點3 超人的例子，向上轉型和向下轉型 class dem...