else's PC and click on the Kailugaji.exe file to run it without installing the JRE file.Four, packaged into the installation package program, like a small software, can be installed anywhere on the machine to run:1. Open Inno Setup Compiler2.3.4. Determination of the way5. In the "WRR" folder just generated an output folder, there is a Setup.exe file, which is successful, so that you can install the Setup.exe on any PC to execute.6. Copy the Setup.exe file to another PC that does not have the J
..."); }else{ System.out.println ("Monday to Friday Rest ..."); }}}/* Weekday byte-code file contents (post-compilation with Java bytecode counter-compile tool): finalclassweekdayextendsenum// The custom Weekday enumeration class is inherited from the Java.lang in the underlying enum{publicstaticfinalweekday monday;publicstaticfinalweekdaytuesday; publicstaticfinalweekdaywednesday;publicstatic finalweekdaythursday;publicstaticfinalweekday Friday;publ
Java Reflection Mechanism:
Testing entity Classes
Taking human as an example
/** * PROJECT:DAY12_FOR_LXY * created:lulu * DATE:2016/8/10/public class Human
Test Get construct method
/** * PROJECT:DAY12_FOR_LXY * Created:lulu * DATE:2016/8/10////////* Get Construction Method/public class TestConstructor {Publ
IC static void Main (string[] args) {//get the corresponding class structure
A simple java multithreading example, java Multithreading
Now there is a task with a list of mobile phone numbers (20 W) and a list of phone numbers (10 W). We need to calculate which phone numbers are not listed in the phone list, which phone numbers appear more than once in the ticket.
The most direct method of thinking is to traverse two layers of loops. Altho
Comparison between static methods and Singleton mode in Java, and java static example Mode
Differences
Singleton Mode
Static Method
Instance
Create an instance
None
Run
Class instance method
Class MethodYou can also run it on an instance of the class Through instantiation.
Can be overwritten
Java UDP network programming is implemented mainly through the Datagramsocket and Datagrampacket two classes, the following is an example program,The server listens on UDP 2000 ports and prints the received long type valuesThe client then gets a long value by entering it and sends it to the server
Server:/**//* Coding by NYZHL *Import java.net. * ;Import java.io. * ;public class Datagramserver ... {public s
}
}///:~
Package pack1;
public class Cookie {public
cookie ()
{
System.out.println ("Cookie constructor");
}
protected void bite () {System.out.println ("bite");}
For a class: A class cannot be declared as protected
For the permission modifiers for a class, here's a better explanation:
Access permissions for class classes: Public: Can be accessed by all classes. Default: The default can be called friendly but ther
version of java7.0.
March 18, 2014, Oracle publishes Java SE 8.
The Java language tries to ensure that there are more than 1G in the system, and the other tools are as follows:
Linux systems, Mac OS systems, Windows 95/98/2000/xp,win 7/8 systems.
Java JDK 7, 8 ...
Notepad Editor or other editor.
Ide:eclipse
After installing the above
Java Reflection detailed
This article is still using a small example to illustrate, because I always feel that the case driven is the best, or only to see the theory, read also do not understand, but suggest that after reading the article, in retrospect to look at the theory, will have a better understanding.
Start the text below.
Case 1 Gets the complete package name and class name from an object
() method in JS to parse the JSON string into a JSON object and then traverse it for front-end use.
Let's get to the bottom of the list of the interactions between JSON and Java objects in Java.
To achieve the mutual transfer between JSON and Java objects, you need a third-party jar pack, which uses the Json-lib jar package, which is downloaded with the addres
:561baace3aea5b925fddc83cTitle: A good successor to socialismContent: Good study, Day day upFansunionDate: Mon Oct 2015 20:42:54 CSTId:1-----------------------Built-in id:561baace3aea5b925fddc83dTitle: A good capitalist grave diggerContent: Work hard, always upFansunionDate: Mon Oct 2015 20:42:54 CSTId:2-----------------------Change the author of the article titled HelloWorld to Ray and modify only AUTHOR1 fieldsBuilt-in id:561baace3aea5b925fddc83cTitle: A good successor to socialismContent: Goo
interfaces of the class;Classclass3.getinterfaces (); //gets the parent class of the classClassClass3.getsuperclass (); //gets all the methods of the class and does not return a constructor;Method[] Methods =Class3.getmethods (); //gets the exception type; constructor and method are inherited from AccessibleObjectclass].getexceptiontypes (); Class].getexceptiontypes (); //Get Local Propertiesfield[] Fields =Class3.getdeclaredfields (); //gets the properties of the interface or parent classfield
Method callsJava supports two ways to invoke a method, depending on whether the method returns a value.When a program calls a method, the control of the program is given to the method being invoked. The control is returned to the program when the return statement of the invoked method executes or arrives at the method body closing parenthesis.When a method returns a value, the method call is usually treated as a value. For example:
int larger
"); - } - + //of Private - Private voidPrivatemethod () {//This method can only be called inside a class +System.out.println ("Privatemethod"); A } at}1 classT {2 Public Static voidMain (string[] args) {3Dog d =NewDog ();//can access4D.publicmethod ();//can access5D.protectedmethod ();//can access6D.defaultmethod ();//can access7 //D.privatemethod ();//private methods that cannot be accessed outside of the class8 }9}1 //On the basis of the above
info to verify whether the information is signed by him/her.Read Public KeyJava. io. ObjectInputStream in = new java. io. ObjectInputStream (new java. io. FileInputStream ("mypubkey. dat "));PublicKey pubkey = (PublicKey) in. readObject ();In. close ();
Read signature and informationIn = new java. io. ObjectInputStream (new
performance of Java applications. In my experience, the file change notifier in Nio.2 is one of the most interesting (underrated) features of the new input/output API.
Many enterprise applications need to do some special processing in the following situations:
When a file is uploaded to an FTP folderWhen the definition in a configuration is modifiedWhen a draft document is uploadedWhen other file system events occurThese are examples of change noti
Java I/O interpretation and use example
Abstract: This article describes how to interpret and use Java I/O.I. Basic concepts of I/O
The full name of I/O is Input/Output, and Java I/O is the Input and Output operations of Java. Related interfaces and classes are stored in th
. Test"); // Generate an instance$ Test-> setName ("haha, PHP calls the JAVA method! "); // The subsequent call is the same as the class method called in php. Echo "call the getName method of the Test class. The returned value is:". $ test-> getName (). "Echo "call the add Method of Test and return value:". $ test-> add (11.2, 15.7 );?> Browser call output:Call the getName method of the Te
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