java programming books pdf

20172330 2017-2018-1 "Java Program design" Fourth week study summary textbook study summaryThis week's content is more and more complex, including chapters fourth and seventh. The fourth chapter introduces the definition and concept of class structure, and gives us a lot of examples to show the method and application of the custom class, and discusses the structure and use of the method definition: Including return statement, parameter, local

)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

synchronized? The JDK used for the test was 1.7, and the implementation of the lock introduced a number of optimizations, such as lock coarsening, lock elimination, lightweight locks (lightweight locking), and jdk1.6. Bias lock (biased locking), adaptive spin (adaptive spinning) and other techniques to reduce the cost of lock operations. And the principle of spin lock, similar to CAS spin, even more than CAS spin more optimization. For details, please refer to the JVM lock mechanism 1-synchron

Set: Exceptions3.1. Code Cloud codes Submission recordIn the Code cloud Project, select statistics-commits history-set time period, and then search for and3.2 PTA Problem set complete situation diagramTwo graphs are required (1. Ranking chart. 2.PTA Submission list diagram)3.3 Count the amount of code completed this weekThe weekly code statistics need to be fused into a single table.Option: 4. ExpandExtracurricular exercisesJavatutorial in questions and exercisesPractice SummaryExtracurricular

1: Summary of this week's study2: Using a database to retrofit your system 2.1: A brief description of how to use the database to transform your system. What table do you want to build? The design of your watch.Create a table for a libraryCreate a library information table for readers---assume that a person can borrow up to 3 books.2.2.: What are the key classes in JDBC used in the system? 2.3: Key code for database-related modules. Critical lines nee

dynamic arrays to store relevant information, but once the amount of data is huge, it is inconvenient to manipulate; You can use files (read-in and read-out) related information 3. Code cloud and PTA3.1 codes to submit records3.2PTA Problem Set Completion chart3.3 Count the amount of code completed this week Weekly total code volume New Code volume Total number of new files First week 189

complete situation diagramTwo graphs are required (1. Ranking chart. 2.PTA Submission list diagram)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 1 0 0 0 0 2 0 0 0 0 3 313 313 9 9 4 64

object (property: Int id, String name,int age,double grade) to the file Student.data, read from the file display.1.1 Generated three student objects, using PrintWriter's Println method to write Student.txt, one student per line, and each student's attribute separated by |. Use scanner or BufferedReader to read the Student.txt data. (Key code, occurrence number)For:1.2 What is the size of the generated file (using the right-click File Properties view)? Analyze the file sizeFor:1.3 If the println

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:

-set time period", then search and3.2 PTA Problem Set completion diagram needs to have two pictures (1. Ranking chart. 2.PTA Submission list diagram)3.3 Statistics The amount of code completed this week requires that the weekly code statistics be fused into a single table. weeks Total code amount new Code volume Total Files number of new files 2 0 0 0 0 3 235 235