【笔记】Eclipse and Java for Total Beginners—002

Lesson 02 – Add Methods To Class

• Introduce Eclipse Views and Perspectives
• Introduce Eclipse user interface – drag / drop, cnntext menus, help
• Add get and set methods to Person class

1. 自动提示或补充标识符。

    英文版的系统用Ctrl+Space， 中文版的系统用Alt+/。

2. Parameters and Fields.

3. this

    this = the current object

4. Class members

    1> Fields for data.

    2> Constructors to create objects.

    3> Methods. e.g.. getters , setters.

  
    

   
      1 
   
     package
   
      org.totoalbeginner.tutorial;

   
      2 
   
     

   
      3 
   
      
   
     public
   
      
   
     class
   
      Person {

   
      4 
   
      

   
      5 
   
      
   
     //
   
      fields
   
     

   
      6 
   
      
   
      
   
     private
   
      String name; 
   
     //
   
      name of the person
   
     

   
      7 
   
      
   
      
   
     private
   
      
   
     int
   
      maximumBooks; 
   
     //
   
      most books the person can check out

   
      8 
   
      

   
      9 
   
      
   
     //
   
      constructors
   
     

   
     10 
   
      
   
      
   
     public
   
      Person() {

   
     11 
   
      name 
   
     =
   
      
   
     "
   
     unknown name
   
     "
   
     ;

   
     12 
   
      maximumBooks 
   
     =
   
      
   
     3
   
     ;

   
     13 
   
      }

   
     14 
   
      

   
     15 
   
      
   
     //
   
      methods
   
     

   
     16 
   
      
   
      
   
     public
   
      String getName() {

   
     17 
   
      
   
     return
   
      name;

   
     18 
   
      }

   
     19 
   
      

   
     20 
   
      
   
     public
   
      
   
     void
   
      setName(String anyName) {

   
     21 
   
      name 
   
     =
   
      anyName; 

   
     22 
   
      }

   
     23 
   
     

   
     24 
   
      
   
     public
   
      
   
     int
   
      getMaximumBooks() {

   
     25 
   
      
   
     return
   
      maximumBooks;

   
     26 
   
      }

   
     27 
   
     

   
     28 
   
      
   
     public
   
      
   
     void
   
      setMaximumBooks(
   
     int
   
      maximumBooks) {

   
     29 
   
      
   
     this
   
     .maximumBooks 
   
     =
   
      maximumBooks;

   
     30 
   
      }

   
     31 
   
      

   
     32 
   
      

   
     33 
   
     

   
     34 
   
     }