java self study

Summary of teaching material content learning1. Understand the basics of Java history2. Learn the installation of JDK3. Learn the basic application of JavaGit learning and code-related1. Learn about the installation of Git on Windows system and the installation of Linux system2. I learned to upload code in a code cloud3. Learned to intercept scriptsRelated issues1. When initially contacting JDK and Java cod

, such as the windowadapter class, accordingly. The adapter has implemented the appropriate interface, such as the windowadapter class implements the windowlistener interface. Therefore, you can use objects created by the Windowadapter subclass to do the monitor, overriding the required interface methods in the subclass. Mouse Events MouseEvent Event Source: Mouse events can occur on any componentMouse events are triggered when the mouse enters the component, exits the comp

monitoring service, you need to specify the type of event you want to receive file change notifications. The registered directory returns a Watchkey instance key. Perform an infinite loop to monitor the events to come. When an event occurs, the instance key is signaled and placed in the watcher queue. Get the key instance back from the watcher queue. The Key instance contains the name of the file where the change occurred. Get the suspended events from the key instance and process t

channel.basicPublish("", QUEUE_NAME, null, message.getBytes("utf-8")); System.out.println("[send]：" + message); channel.close(); connection.close(); } catch (IOException | TimeoutException e) { e.printStackTrace(); }}}Operation Result:[Send]:this is simple queueCopy Code2.5. Consumer (Receive)Copy Codepublic class Receive{Queue nameprivate static final String queue_name = "Test_simple_queue";public static void main(String[] args){ try {

week 557 557 10 10 Week Four 621 621 8 8 Week Five 326 326 7 7 Week Six 972 972 12 12 Seventh Week 338 338 4 4 Eighth Week 379 379 6 6

is), and then compare the speed (read only, not output) of reading data from the file using BufferedReader with scanner, which method is fast? Intercept the test source code, the number of the study. Please analyze the reasons in detail. Tip: You can use JUNIT4 to compare run timesThis picture is cut in the school's lab, so it's not the same as other diagrams.Using BufferedReader will save the contents of the file to the memory and then read, and sca

6.1 Using code and running results to prove that you did implement the transactional functionality, and what do you need to be aware of when you encode transactions? Note: To compare the changes made to the database in both the successful and failed run scenarios. (Paste a piece of code that you think is more valuable.) 6.2 When do you think you need to use transaction processing?Reference: Experimental Task book-topic 4Reference: Transactiontest.javaOptional: 5. Extracurricular reading 5.

Job 14-Database 1. This week's study summary 1.1 summarizes the database-related content in the way you like (mind map or other).2. Using database technology your system 2.1 briefly describes how to use the database to transform your system. What table do you want to build? The design of your watch. What are the key classes used in JDBC in the 2.2 system? 2.3 Key code for database related modules. Critical lines need to be annotated. 3. Code volume St

situations where exceptions occur. It is typical to use an if statement for type and array judgments.1.2 What kind of exception requires the user to be sure to use capture processing?Checked ExceptionRequires that the user be sure to capture the processing. Use the Try-catch or throws keyword to declare an exception that might be thrown2. Handle exceptions to make your program more robust 2.1 experimental summary. And answer: How can you make your program more robust? Experimental summ

)3.3 Count the amount of code completed this weekThe weekly code statistics need to be fused into a single table. Week Time Total code Amount New Code Volume total number of files number of new files 2 625 625 99 99 3 1429 804 113 14 4 3354 1925 223 110 5 3751 397 241 18 6 4369 31] 80 -1

run times BufferedReader reading data faster than scanner BufferedReader has greater buffer memory; Scanner requires parsing of input data, which is more time consuming 4.3 character encoding 4.3.1 an existing EncodeTest.txt file that contains some Chinese, the file is encoded using UTF-8. Use FileReader and BufferedReader to read the EncodeTest.txt text into and out. Do you have garbled characters? Why does it have garbled characters? How to solve? (Key code, occurrence numbe

section of the system with the stream associated with the file? Why use these interfaces with classes? Read with classes, classes, File FileReader BufferedReader classes, files created through file objects, and the other two classes with the read. Write files are used to BufferedWriter , OutputStreamWriter , FileOutputStream . 2.3 Read and write file-related code. Key lines need to be annotated3. Code volume Statistics 3.1 Statistics The amount of code done this week selected: