Book Example 3 Radio Button and Check Button

Example 3 of Delphi 7 Programming Skills and Case Elaboration After reading the title, I first realized it according to my own ideas. I checked the properties of the control once again when I clicked the "display" button to determine the content of ShowMessage. The sample program given in the book is to update the variables with ...

Posted by Desertwar on Sun, 06 Oct 2019 11:42:11 -0700

Java Basic Tutorial - String Class

String class All string literals (such as "abc") in Java programs are examples of String Strings are constants (String objects are immutable, so they can be shared) The essence of a string is an array of characters: private final char value []; Common ways to create strings public class CreateString { public static void main(Strin ...

Posted by alexdoug on Fri, 12 Jul 2019 11:14:58 -0700

c# Serial Communication and Processing Received Multiple Parameters

Recently, I tried to make a PC and simply recorded the key parts. The System.IO.Ports class is mainly used in c# serial communication, but it is very convenient in fact. The final results are as follows: Don't forget the following Fill in the configuration of serial port We can get the list of ports on this machine by GetPortNames method. Note ...

Posted by brandone on Sat, 01 Jun 2019 10:56:23 -0700

Developing OPC Client 4 with Lazarus (DLL interworking with Dot Net)

The functions developed for historical reasons need to be provided for application in. NET environment. This should be a difficult point. C and dot NET are managed code. The release of resources is accomplished by GC. Simple data types can be declared as corresponding, and complex data is even more troublesome. Here he talks about character set ...

Posted by yelvington on Tue, 01 Jan 2019 03:48:08 -0800