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Through the third week of study, I learned about the object and class in the Java language this piece of knowledge point.Java is an object-oriented programming language, object-oriented programs are composed of objects, classes (Class) is a template or blueprint for constructing objects, so learning objects and classes is very important.With regard to the use of objects and classes, if you want to use an object, you must first construct the object, sp

Java Fifth Week learning experience through this week's study, the inheritance has a certain understanding, but not very familiar with the teacher in class according to the previous method of the fifth section of the understanding of the deeper into a bit, but also need a lot of code to grasp the deeper, because the method of sudden change, or there is a little unaccustomed, so now still in the adaptation, Feel that some knowledge is not very deep,

java Tenth Week learning experience Through the tenth week of learning, we learned about generic programming (Generic programming), which is also known as a parameterized type, that is, when defining classes, interfaces, and methods, the type parameter indicates the type of object that will be processed (such as the ArrayList Class). Generic programming means that writing code can be reused by many different types of objects, generics are abstract s

Java BASIC program process control (below), java ProcessJava program flow control (below) This article separately sorts out the knowledge points of the loop structure: The loop structure is divided into: for Loop, while loop, do... the while loop has three basic loop structures. In Versions later than JDK1.5, The forea

Java program --- converts a floating point number into a Renminbi reading method, java reading Method The Code is as follows:

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);//(2) begin = System.nanotime (); StringBuffer s2 = new StringBuffer ("Hello"); S2.append ("World"); end = System.nanotime (); System.out.println (End-begin);}Second, Currenttimemillis ()Returns the current time in milliseconds. Note that when the time unit of the return value is milliseconds, the granularity of the value depends on the underlying operating system, and the granularity may be greater. For example, many operating systems measure time in dozens of milliseconds.Return: the

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Development tool: Eclipse-jee-juno-sr2-win32-x86_64 (please download it by yourself) Using the server: apache-tomcat-7.0.35-windows-x64 (please download it on your own website) Open Eclipse:Press to install JDK1.7 before openingBecause eclipse needs the JDKSteps to read 2Find ' window ' under ' Preferences 'Click ' Preferences 'Steps to read 3Find ' Preferences 'Server---rntime evironmentSteps to read 4Click ' Add ' to add a new runtime environment:Steps to read 5Select

Java exercises, how much you can do. http://bbs.csdn.net/topics/110067294 This is seen from CSDN. One every day. "Program 11" Question: There are 1, 2, 3, 4 digits, which can be composed of a number of different and no duplicate number of three digits. is how much. 1. Procedure analysis: Can fill in the hundred, 10 digits, single-digit digits are 1, 2, 3, 4. Make up all the permutations and then remove the

; Threadjoin () {Customer=NewThread ( This, "Customer"); Tvmaker=NewThread ( This, "TV maker"); } Public voidrun () {if(Thread.CurrentThread () = =customer) {System.out.println (Customer.getname ()+ "et" +tvmaker.getname () + "Production TV"); Try{tvmaker.join ();//thread customer starts waiting for Tvmaker to end}Catch(Interruptedexception e) {} System.out.println (Customer.getname ()+ "bought a TV" +tv.name+ "Price:" +Tv.price); } Else if

印。后置打印返回结果（返回的结果是一个复杂的类）。（2）学习内容：spring框架试验方法：对某一包下，所有类的方法做切面，打印日志。4. 反射机制学习内容：java的反射机制试验方法：写一段程序，调用一个Bean下实现了标注（“autocall”）的方法5. 配置数据源学习内容：配置数据源实验方法：自己建一张表，引入数据库连接池，自动插入20万条数据，创建联合索引，验证走索引和不走索引的耗时，查看sql是否走索引，学会查看查询，计划实验，用标注式事务，编程式事务（查看编程式事务源码实现）；用乐观锁和悲观锁实现数据更新。 Learning needs to know:1. What is2. What problems have been solved3, how to achieveThis article goes to CSDN, the "Java Basic learn

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