20165301 2017-2018-2 "Java Programming" Fifth Week study summary

20165301 2017-2018-2 "Java program design" Fifth week study summary textbook Learning content Summary seventh: Inner class and Exception class

• Inner class
• Defining another class in one class
• Non-intrinsic class is not a static class
• Anonymous class
• A subclass removes the class-declaration-body
• Create an object with a subclass of bank (anonymous class)
  new Bank(){ 匿名类的类体 }
• Anonymous classes related to interfaces
  new Computable(){ 实现接口的匿名类的类体 }
• Exception class
• The exception object can call the following method to get or output information about the exception
  public String getMessage(); public void printStackTrace(); public String toString();
• Try-catch statements
  • If a return statement is executed in the Try-catch statement, then the finally child statement is still executed
  • The program exit code is executed in the Try-catch statement, that is, execution of System.exit (0), and the finally child statement is not executed
• Assertion

Tenth chapter: input, Output stream

• File class
• Create a method for constructing a file object where filename is the name of the document, DirectoryPath is the path to the file, and Dir is a directory:

File(String filename);File(String directoryPath,String filename);File(File dir,String filename);

• Buffered streams
• Output stream: The Read and write methods of the character input stream and output stream use a character array to read the data
• Use scanner to parse a file, create a dialog box with JFileChooser

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Learning progress Bar

	lines of code (new/cumulative)	Blog Volume (Add/accumulate)	Learning Time (new/cumulative)	Important Growth
target	5000 Line	30	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
fourth week	421/1425	1/5	10/30
fifth week	829/2283	1/6	10/40

20165301 2017-2018-2 Java programming Fifth week of study summary