20165301 2017-2018-2 "Java Programming" third week study summary

20165301 2017-2018-2 "Java program design" The third week study summary textbook Study content Summary fourth chapter: Class and Object

• class :
• Declaration of class: Class+ class Name

• Class Body: Declaration of Member Variable + method (local variable + statement)

• Object
• Construction method: As with the class name, no type
• To create an object:
• Declaring objects: Class name + object name
• Working with objects:
  Object. Variables
  Object. Method
• Object references and entities: two objects of the same type, same reference, same entity
• This keyword : Represents an object that must be called by an object and cannot be present in a class method.
• Package
• Format: Package Name
• If you run the main class with the package name, the main class full name is the package name. The main class name.
• Import statement

• Import java.util.*.

Problems in teaching materials learning and the solving process

• Issue 1: With package compilation, how to place the file location at run time.
• Problem 1 Solution: Put the relevant files in the same folder and run.
• Issue 2: How to compile when there are multiple Java source files
• Problem 3 Solution: Try compiling under the Linux system, view the directory with tree and draw a conclusion. Just compile the main class Java source file once.

Problems in code debugging and the resolution process

• Issue 1: When there are multiple Java source files, you cannot compile using javac-d bin Src/***.java.
• Problem 1 Solution: Javac ***.java directly in the src file, the resulting multiple class files are in the SRC folder.

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	lines of code (new/cumulative)	Blog Volume (Add/accumulate)	Learning Time (new/cumulative)	Important Growth
Goal	5000 rows	30 Articles	400 hours
First week	11/11	1/1	4/4
Second week	286/297	2/3	6/10
Third week	722/1004	1/4	10/20

20165301 2017-2018-2 "Java Programming" third week study summary