java self study

Java Study Notes 11 (Object-Oriented 4: Polymorphism) and java Study Notes Polymorphism: Example: Describes multiple forms of a thing. For example, the Student class inherits the Person class. A Student object is both Student and Person. Polymorphism is: the parent class reference variable can point to the subclass obj

Java Study Notes 30, java Study Notes The sortedlist class is the implementation class of the List interface. It is a List set and allows random access to the collection elements based on the index. In addition, the consumer list is also real The Deque interface can be used as a dual-end queue or a "stack. A chain-bas

Java study notes 28, java Study Notes Vector is the implementation class of the List interface and supports all functions of the List interface. The Vector class is a List class implemented based on arrays and encapsulates a dynamic, The Object [] array that allows redistribution. The Vector is thread-safe and require

Java Study Notes 27, java Study Notes Vector is the implementation class of the List interface and supports all functions of the List interface. The Vector class is a List class implemented based on arrays and encapsulates a dynamic, The Object [] array that allows redistribution. The Vector is thread-safe and require

Java Study Notes 17 (Object-Oriented 10: Comprehensive cases) and java Study Notes At the end of the object-oriented topic Combined with the previous articles, I used many Object-Oriented Knowledge and made a simple case: Hotel case: Package hotel;/** hotel staff class * Common Features of employees: name, Employee i

Java Study Notes 3 (array), java Study Notes 3 Array 1. array definition: First: Public class ArrayDemo {Public static void main (String [] args ){// Define an arrayInt [] arr = new int [3];// The default value of the element in the array is 0.System. out. println (arr [0]);System. out. println (arr. length );}} Here

Java Study Notes 12 -- Exception Handling and Study Notes 12 -- Java learning notes series: Java study note 11-Summary Java Study Notes 10-g

Java study notes 9-internal class summary, study notes 9 -- Java learning notes series: Java study note 8-interface Summary Java study notes

12 13 8899 1498 141 18 4: Optional 4.1: Character stream with text file: Using PrintWriter (Write), BufferedReader (read) 1: Generated three student objects, Use PrintWriter's println method to write to 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)Operation Result:2: How much is the generated file size (using the right-click

Java Study Notes 6 -- class inheritance, Object class, and study notes 6 -- Next, we learned the following: Java study notes 5-Class Method Java Study Notes 4-basic concepts of classes

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 need to be annotated. 3: Code Volume statisticsS

Java gui programming Overview Study Notes (22), gui Study Notes The following content is my study notes on the java video tutorial of Miss Bi Xiangdong! Java gui programming:Windows provides two methods:1. GUI2. CLI;GUI: Grahi

Java Study Notes 2 -- data type, array, Study Notes 2 -- URL: http://www.cnblogs.com/archimedes/p/java-study-note2.html.1. Data Type Java data types include: Primitive Data Types) Reference type)

Java Study Notes-JDBC and Study Notes-jdbcIntroduction to JDBC 1. to simplify and unify database operations, SUN defines a set of Java database operation specifications, called JDBC.2. database-driven3. JDBC is called JAVA DataBase commecti.pdf (

Java Study Notes-JDBC6 (21), study notes jdbc6 1. Use a dynamic proxy to write the connection pool Design: Proxy target: Native connection. Proxy purpose: Modify the close method so that the close method cannot close the connection and actively detaches the connection. Communicate with the thread through a dynamic Proxy: 1: proxy for Cxonnection. 2: The Connecti

Java programming ideology Study Notes (1), programming ideology Study NotesObject Introduction 1. Abstract all programming languages provide abstract mechanisms. For example, assembly is a slight abstraction of the machine, and C language is an abstraction of assembly. In comparison, these languages have strong limitations in solving problems. Because they force

Java Study Notes (1) Java recognition and java notes 1. Java introduction: Java technology consists of the Java language, Java Runtime Envir

: Explain the module you are responsible for, and paste the key code of your own module (the number and name of the school). 3: Code Cloud and PTA3.1: Code cloud codes Submission record3.2: "Multi-threaded" PTA Submission List3.3: Count the amount of code done this week Week Time Total code Amount new increase in code volume Total Folder Add new Folder 1 114 114 11 11 2 520 50W 16 6

10 6680 985 102 18 4: Evaluate how much you understand Java Dimension of Grammar Some basic grammar is not a problem, but there are some unskilled grammar, need Baidu Object-oriented design This aspect is weak, has the basic logic of thinking, in doing the shopping cart big homework often will make mistakes, do not know where to start

ActionListener () { Span class= "hljs-function" >public void actionperformed (ActionEvent evt) {B.setlabel (new Integer (++count). toString ()); //every click of the button, the number on the button will be added 1}); F.add (b); //Add button f.setsize (100,200); //set Form size f.setbackground (Color.pink); //set the form color f.setvisible (true); //set form Visible}} 5. Pair programming: Object-oriented design (big job 2-very important, unfinished-2)Continue to refine last week's