writing software programs

Writing high-quality code: 151 suggestions for improving Java programs (Chapter 1: common methods and guidelines for JAVA Development ___ recommendation 1 ~ 5), java151 The reasonable man adapts himself to the world; The unreasonable one persists in trying to adapt the world himself. People who understand the truth adapt themselves to the world; people who do not know the truth want to adapt the world to th

) { This. Dispatcher.invoke (Action)Delegate { Throwex; }); } }); T.start ();However, in addition to the two methods above, we recommend using event callbacks to wrap the worker thread's exception to the main thread. The benefit of handling exceptions in the form of event callbacks is to provide a uniform entry for exception handling. This approach will be elaborated in recommendation 85.Turn from: 157 recommendations

The realm of writing programs using the Java language for Palm OS is not completely unified, and there are a number of differences, and there are several different application interfaces available on the market, each of which provides varying degrees of access to the current Palm OS application. Perhaps the most familiar of these are the products produced by Sun Microsystems, but this is not the only produc

compilation, which means that the execution efficiency of the script is improved. In some sense, Zend encode is a "PHP compiler". However, it is not a true compiler, because the actual compiled program can be run away from the original compilation environment, and Zend encode compiled programs, need to have Zend Optimizer support. Just like compiling a good Java binary code, you need the support of the JVM. So, Zend Optimizer can be seen as a virtua

Xml| program Java and XML (ii) write XML reading and writing programs in Java This is to read the XML file Java program, I debug good. The DOM method is used to read the XML file into the vector. Package src; Import java.io.*; Import Java.util.Vector; Import javax.xml.parsers.*; Import org.w3c.dom.*; public class ReadXml { static document document; private Boolean validating; Public ReadXml () { } Public V

Recommendation 67: Use custom exceptions with cautionDo not create a custom exception unless there is a good reason to do so. If you want to do something special with a class of programs, customize the exception. The reasons for customizing exceptions are as follows:1) easy to test. By throwing a custom instance of the exception type, we can make the captured code know exactly what happened and restore it in a consistent manner.2) Logical packaging. C

Java Programmers need to mix Object-oriented Thinking and general imperative programming methods in programming. Whether the two can be perfectly combined depends entirely on the programmer's level:Skills (anyone can easily learn imperative programming)Mode (some people use "Mode-mode". For example, the mode can be applied anywhere and can be classified as a certain type of mode)Mood (first of all, writing a good object-oriented program is much harder

Execution logic and process of simple JTAG burning and writing programs This article is excerpted from Wang honghui's book "Practical Guide for developing embedded Linux kernel (ARM platform )". There are many simple JTAG burning and writing programs on the Internet, which are written in standard C, Vc, windows, and L

10 errors that Java programmers often make when writing SQL programs Java Programmers need to mix Object-oriented Thinking and general imperative programming methods in programming. Whether the two can be perfectly combined depends entirely on the programmer's level: Skills (anyone can easily learn imperative programming) Mode (some people use "Mode-mode". For example, the mode can be applied anywhere and

1Writing processing programs using eclipse1.1Preparation instructions2015-08-11 22:25:23Local Environment: mac,jdk8,processing2.2This article uses the Mac to test, in the Linux and the win under also does not have the difference, the principle is consistent Reference articlesHttps://processing.org/tutorials/eclipse/Processing in Eclipse 1.2Find the processing jar packageProcessing installed on Mac system, right-click on program->show Package Contents

Recommendation 29: Distinguish between IenumerableLINQ queries provide a total of two types of extension methods, under the System.Linq namespace, there are two static classes: The Enumerable class, which extends for collections that inherit the IenumerableLINQ queries can actually be functionally divided into 3 classes: LINQ to OBJECTS, LINQ to SQL, LINQ to XML. The purpose of designing two sets of interfaces is to differentiate between LINQ to OBJECTS and LINQ to SQL, both of which are used in

the desktop. (Input in terminal)CD Desktop//Then press ENTER3. Create a folder (this step can be skipped, but recommended)mkdir file name4. Create a textgedit Hello WORLD.C//Then press ENTER to jump out of a Windows-like Notepad5. Go inside and knock the codeCInclude int main(void) { printf("hello world!"); return 0; } 6.保存代码，关闭文本框。按esc，再输入：wq（一开始看不到尽管输进去，wq为保存并关闭，也可为w则为保存不关闭） 7.启动gcc对代码进行编译。 gcc helloworld.c -o execFile（此步骤会生成一个execFlie的文件，可用ls查看）8.如果有错误，系统会提示，按方向键找回gedit helloworld.c 的指令，按下回车

matter, and then in the second time on the machine class, the teacher again explained that I understand the meaning of the topic. Most of the relevant computer courses have been forgotten, for example, the use of switch control statements in C programs and the use of classes in Java do not remember, in the process of writing procedures are good time to access textbooks and materials, to seek the help of st

= $ }, NewPerson () {Name ="Jessica", age = - }, }; StaticAutoResetEvent AutoSet =NewAutoResetEvent (false); Static ObjectSycobj =New Object(); Static voidMain (string[] args) { //Object sycobj = new Object ();Thread T1 =NewThread (() = { //Be sure to wait for T2 to start before running the following codeAutoset.waitone (); Lock(sycobj) {foreach(Person iteminchlist) {Console.WriteLine ("T1:"+item. Name); Threa

behavior without having to write code.Another benefit of adopting an abstract class is that if you add a method to the base class, then all subclasses of that base class will naturally have this extra method, and the interface does not. If an interface adds a method, all subclasses must be modified. So, once the interface is designed, it should be constant. Abstract classes can add functionality as the version is upgraded.The role of an interface is more likely to indicate that a type has some

the latter type is delegate. The delegate is divided into delegate end and callback end according to the function of the delegate type, we must pay attention to distinguish this point when declaring the delegate. If the delegate is used for the callback nature, the callback end is used.The naming of the delegate and the event is inappropriate, that is, the type is not visible from the name, as follows: Public Delegate void DoSomething (intint b); Public Delegate void MouseClick (intin

Recommendation 151: Replace the exposed event member variables with event accessorsEvent accessors contain two parts: add accessors and delete accessors. You should always use event accessors if you are involved in a public event field. The code looks like this: class SampleClass { new eventhandlerlist (); Public Event EventHandler Click { add { events.} AddHandler (null, value); } Remove {

(t); } foreach(Action tinchlists) {T (); } }This code is consistent with the following code: Static voidMain (string[] args) {ListNewList(); for(inti =0; I 5; i++) {Tempclass Tempclass=NewTempclass (); Tempclass.i=i; Action T=Tempclass.tempfuc; Lists. ADD (t); } foreach(Action tinchlists) {T (); } } classTempclass { Public inti; Public voidTempfuc () {Console.WriteLine (i.ToString ()); } }Turn from: 157

following naming convention:Delegate variable owning object +on+ delegate variable nameAs follows: Public BOOL Nameonvalidatevalue (object value) { } publicvoid Nameonpropertychanged (DependencyObject D, DependencyPropertyChangedEventArgs e) { }Name of the failure: Public void namechanged (DependencyObject D, DependencyPropertyChangedEventArgs e) { }This name should look more like a delegate o

the correctness of this test method. "); }Modify the method to the method we need: //////Test of ADD///[TestMethod ()]PublicvoidAddtest () {SampleClass target =New SampleClass ();// TODO: Initialize to the appropriate value int a = 1// TODO: Initialize to the appropriate value int b = Span style= "COLOR: #800080" >2; // TODO: Initialize to the appropriate value int expected = 3; // TODO: Initialize to the appropriate value int actual; Actual = target. Add (A, b); Assert.AreEqual (expecte