problems on inheritance in java

Original article: http://sarin.iteye.com/blog/603684 Let's look at an example. The Code is as follows:Java code Public class test { Public static void main (string [] ARGs ){ String STR = "ABC "; String str1 = "ABC "; String str2 = new string ("ABC "); System. Out. println (STR = str1 ); System. Out. println (str1 = "ABC "); System. Out. println (str2 = "ABC "); System. Out. println (str1 = str2 ); System. Out. println (str1.equals (str2 )); System. Out. println (str1 = str2.intern

Problems with the Java access modifier constructorJava access Modifier-Qualifier Summary (analogy C #)Java access modifier----------[Public | default | protected | private]Public: Fully developedProtected: Same package and sub-class accessDefault (None): Same Package accessPrivate: can only be accessed in this classJAVA is used for class modifiers (2) and Qualifi

Coding | Problems Java language default encoding is Unicode, and we Chinese commonly used files and databases are based on GB2312 or BIG5 encoding, how to properly select the encoding method and correctly handle the Chinese character encoding? This article will start with encoding common sense, combine Java programming example, analyze above two questions and pro

, RESULTSET.CONCUR_READ_ONLY);To set the cursor so that the cursor does not cache the data directly into local memory, and then sets Statement.setfetchsize (200), setting the size of each traversal of the cursor; OK, I used it, Oracle used and useless no difference, Because the Oracle JDBC API by default is not to cache the data into Java memory, and MySQL is not set at all, I said a bunch of crap, hehe, I just want to say that

Problems encountered when developing Bluetooth in PC-side java, pcjava For project reasons, we need to develop a client that transmits data via Bluetooth on the computer. I use JAVA and JSME for development. Client: Search for the Bluetooth signal, and find the corresponding Bluetooth signal to connect. Server: the Bluetooth signal that the client needs to connec

tasks, including creating a service record describing the service provided, accepting a connection from the client, and adding a new service record to the service Discovery Database (SDDB) of the service device.The software I use is an ADT integrated development tool that I previously compiled for Android.32-bit Java development environment.The PC side uses the Bluetooth adapter, which installs the bluesoleil_.6.v6.4.249.Here are some of the

Recently, we have been working as a data service provided by other organizations. Because the clients of different units are different, we have considered using WebService to provide data interfaces. To improve security, we adopt the WSE Security Authentication solution. However, it is restricted by the objective environment of the server, so it can only be used. net Framework 1.1 + wse2.0 SP3 (it is recommended that the server install some packet capture tools or learn to open the input and out

In fact, I wanted to write such a short article a long time ago. Unfortunately, I didn't have a blog at the time, so I wrote it down until now. In recent years, with the popularity of Java in web applications and enterprise applications, the demand for Java programmers has increased significantly. As a result, the number of Java programmers has suddenly soared (

variable value is unsigned, followed by a semicolon)The installation and configuration are complete by this step.O3 Verify the configuration is successful:Run--"input cmdShow this diagramThen enter Java to display this figureInput java-version Display:Input Javac DisplayDescription the configuration was successful.O4 the problems and solutions I personally encou

US Eastern Time March 25 16:23 (Beijing time March 26 05:23) News, Sun's lab is currently working on a research and development effort to develop a multitasking virtual machine designed to solve the problems that occur when multiple Java applications run simultaneously, including storage, Issues of start-up and implementation. 　　 According to the company's java.sun.com Web site, the multitasking virtual ma

Directory1.UITableView Sliding lag optimization2. Right swipe gesture back3. Add Page StatsVersion 4.debug and release5. About page Refresh6. About page layouts7. Recommended BlogsEncountering Problems and SolutionsThis article is a summary of the first project in Java ios-(1), the content of the analysis encountered some problems and solutions, share some of the

Summary of parameter passing problems in Java Summary of parameter passing problems in Java Start with two examples: 1)Public class Test2 { Public static void main (string [] ARGs ){Stringbuffer A = new stringbuffer ("");Stringbuffer B = new stringbuffer ("B ");Operate (A, B );System. Out. println (a + "," + B );} Sta

Java inserts mysql binary files and blob types. Problems and Solutions: bitsCN.com is the first thing to prepare for database creation: We need to set the binary field to the Blob type, and select the appropriate Blob type based on the file size. The following figure shows the size of each Blob type that can accommodate binary files. Four BLOB types in MySQL Type size (unit: bytes) TinyBlob Max. 255 Blob Ma

Tss Translation: common Java memory problems Part 1 Http://www.theserverside.com/news/thread.tss? Thread_id = 62217 Http://blog.dynatrace.com/2011/04/20/the-top-java-memory-problems-part-1/ Memory and garbage collector have always been one of the most noteworthy issues in Ja