2. Java Object-oriented

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* Description: Class, equivalent to a kind, format: class name {class}, the name of the class is the same as the file name, that is, a file only one class;
* object, which is a variable of class, Format: Class name Object name (equivalent to class variable) =new class name (), for example: If int is a class, then integer variable A is an object;
* Member of the object, which treats the class as a struct, then the object is the variable of the struct, and the member of the object is the attribute in the struct.
* Process-oriented and object oriented, process-oriented problems are not used in the class, direct manipulation, object-oriented is the use of classes, the class has many properties or sub-functions, etc., and then after the definition of the object by invoking the class
* Attributes and sub-functions to solve the problem, the advantage is that the program is modular.

1 /************************************************************************************************************* ************************2  * 3 * Description: Class, equivalent to a kind, format: class name {class}, the name of the class is the same as the file name, that is, a file only one class;4 * object, which is a variable of class, Format: Class name Object name (equivalent to class variable) =new class name (), for example: If int is a class, then integer variable A is an object;5 * Member of the object, which treats the class as a struct, then the object is the variable of the struct, and the member of the object is the attribute in the struct .6 * Process-oriented and object oriented, process-oriented problems are not used in the class, direct manipulation, object-oriented is the use of classes, the class has many properties or sub-functions, etc., and then after the definition of the object by invoking the class7 * Attributes and sub-functions to solve the problem, the advantage is that the program is modular. 8  *        9  ********************************************************************************************************** **************************/Ten  One  Public classLiubo//Defining Classes A { -     //-- The attributes of the year and the month--// -     intyear=2015,month=11; the      -     //-- Weather Properties--// -String weather= "Sunny Day"; -      +     //--Displays the properties of the week with no return value--// -      Public voidPrintintN//Unlike the C language, if there is no parameter in the child function can not use void, directly empty, otherwise error +     { A         if((n<7) && (n>0)) atSystem.out.println ("Today is week:" +n); -         Else if(n==7) -System.out.println ("Today is Sunday"); -         Else -SYSTEM.OUT.PRINTLN ("Error"); -     } in      -     //-- the day after tomorrow, there is a return value--// to      Public intDayaftertom (intN) +     { -         if((n>=1) && (n<=5)) the             returnN+2; *         Else if((n==6) | | (n==7)); $             returnN/7+1;Panax Notoginseng     } -      the     //-- main function--// +      Public Static voidMain (string[] args) A     { theLiubo bobo=NewLiubo ();//define an object bobo, Format: Class name Object name =new object name () +          -SYSTEM.OUT.PRINTLN ("This year is:" +bobo.year+ "year");//the members of the object use: Object name. Member Name $System.out.println ("Current:" +bobo.month+ "Month"); $System.out.println ("The current weather is:" +bobo.weather); -Bobo.print (5); -          the         if(Bobo. Dayaftertom (5) ==7)//use the return value directly when there is a return value -System.out.println ("Day After Tomorrow: Days"));Wuyi         Else theSystem.out.println ("The Day After Tomorrow is the week:" +bobo. Dayaftertom (5)); -          Wu          -          About     } $      -      -}

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2. Java Object-oriented