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view. More content Learning: During this learning process, it was found that a large part of the Java syntax structure is similar to the C language, such as loop statements, conditional branching statements, and switch switches. In contrast to the C language, there is a Boolean type, and only Boolean types of data can be used in conditional statements. And in the course of learning to find the code on the book is a good way to learn, you can
open the code editing area, enter the code to complete the programming;4, after the completion of the code can be executed by "run" program, or ctrl+f11 shortcut keys.5. Breakpoint settings: You can double-click the line number in the line where you want to set the breakpoint, or select Toggle Breakpoint setting or delete;6, run the program in debug mode: Right click on the program code to select "Debug mode"/"Java Application" (or through the menu),
20165301 2016-2017-2 "Java Programming" X-week study summarySummarizing the contents of textbook learning 1.1 the status of Java Java is particularly suitable for the development of Internet applications and dominates the network. Java is object-oriented program
20165333 2016-2017-2 "Java program design" 1th Week study summary textbook study summary The status of Java Features of Java Installing the JDK Setup of the system environment Writing, compiling, and running Java
(); } } # Scala Equivalentclass book{ "non-fiction"}Object book{ = new book ()}5. Handling Exceptions# A Scala method that throws an Exceotionclass someclass{ def ascalamethod{throw new Exception (" exception " )}}# calling a Scala method from a Java classpublc static void Main (string[] args) { = new SomeClass (); S.ascalamethod ();} # The uncaught exception causes the J
20165208 2017-2018-2 "Java program design" Eighth Week study summary textbook Learning content Summary Chapter 12th thread State To create a thread object Created directly with the thread class or subclass: Thread(Runnable target) creates a thread, gets the current thread object, and getName() returns the name of the thread. Use the Runnable interface: more flexible than thread
method body.Sentiment:This week's content is significantly more than the previous two weeks, and is a new knowledge and new concepts that have not been contacted in the past, it will take time to understand, and the code will have to be improved step-by-step. I am still not proficient in these new knowledge, I hope to spend more time on the code after the proficiency of the application. I think pre-class preview is very necessary, if not in time to master so will be left a lot of, follow the la
2018-2019-20172329 "Java software architecture and data structure" first week study summary In this semester is already sophomore, also has entered the study specialized course core time, at this stage, we should know oneself the study situation, according to own learning ability to make the different plan, ob
20155336 2016-2017-2 "Java program design" Eighth Week study summary textbook study summary14th Chapter NIO and NIO2 About NIONIO使用频道来衔接数据结点，在处理数据时，NIO可以让你设定缓冲区容量，在缓冲区中对感兴趣的数据区块进行标记，像是标记读取位置、数据有效位置，对于这些区块标记，提供了Clear（）、rewind（）、flip（）、compact（）等高级操作。 NIO2 IntroductionNIO2文件系统API提供一组标准接口与类，应用程序开发者只要基于这些标准接口与类进行文件系统操作，底层实际如何进行文件系统操作，是由文件系统提供负责。 15t
Chapter 1th Java Introduction Java featuresSimpleObject orientedPlatform-IndependentMultithreading: Allows multiple tasks to be completed at the same timeDynamic: The basic component of a Java program is a class (some classes are written by themselves, some are introduced from a class library, and classes are dynamically loaded at runtime)Platform and JDK install
20165226 2017-2018-4 "Java program Design" 7th Week study Summary Textbook Learning contents Summary 11th Chapter JDBC and MySQL Database Download the latest version of MySQL. Connecting to a database Download Jdbc-mysql Database Driver Load Jdbc-mysql Database Driver Connect to Database ( Connection getConnection(java.lang.String,java.lang.String,java.lang.String) and Co
applications on small digital devices;7.What is the difference between Oracle jdk and open jdk? Oracle JDK Implementation is the Sun JDK implementation, Oracle JDK using JRL, and open JDK using the GPL, the former source code can be used for personal research use, but prohibit any commercial use, the latter allows commercial usage;8.What are the main applications of Java? What are your goals and expectations in this course? Network programming, enter
20145118 "Java program design" The 1th Week study summary textbook Learning content SummarySince the winter vacation at home has installed the Java development tools, so the installation process is not mentioned here. This week I started the Java beginner stage, from the Java
open JDK?Oracle JDK is used for personal research, Oracle JDK is published on the basis of OPENJDK, and a few original codes are replaced. Oracle JDK is more complete than open JDK functionality.What are the main applications of 8..Java? What are your goals and expectations in this course?Should be used to develop a variety of apps. The goal is not to hang, the results of the ideal point. I heard that senior Java
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
no such command.A: The current DOS command line window can be used temporarily after using path e:\jdk1.9\bin;%path%.Q:javac can be used, you cannot edit it using Java, even after setting the CLASSPATH environment variable.A: Since I did not initially install the directory to select the book, so some environment variables may be set error, so I reinstall the JDK, but there is no JRE file in JDK1.9, I found that can. %java_home%\lib\dt.jar;%java_home%
. The main document name and class name must be the same, and the class name refers to the name after the class keyword. Also note the case of each letter. The Java program distinguishes the case of letters. System and system are different names for Java programs. A space can only be half-width spaces or tab characters. Learning Experience: in
20145216 Java Programming 2nd week of study summarySummary of learning contents of textbookChapter III Basic Grammar3.1 types, variables, and operators• Type• Basic Types•整数：short（占2字节）、int（占4字节）、long（占8字节）•字节：byte•浮点数：float（占4字节）、double（占8字节）•字符：char（汉字、英文字符都是双字节的）•布尔：boolean（true/false不能与其他类型进行运算）• Class type• Variables: The data staging location is called a variable in the program language, the variable
matching the pattern //start (); Returns the starting position of the last string matched with the pattern //end (); Returns the end position of the last string matched with the pattern while(M.find ()) {System. out. Print (M.Group()+"\ T"); System. out. println ("The starting position of the substring is:"+m.start () +"The terminating position is:"+m.end ()); }//lookingat () returns whether the preceding part of the target string matches the patternSystem. out. prin
no meaning. Final-->eg:final abstract void Show ();--->final adornment cannot be overridden,abstract Need to be overwritten. What is the difference between an abstract class and a generic class? The same point: abstract classes and general classes are used to describe things, and members are internally determined.different points: 1. General classes have enough information to describe things, and abstract classes may not have enough information to describe things. 2. Abstract me
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