Java

Package COM.XIAN.JDBC;Import Java.io.BufferedInputStream;Import Java.io.FileInputStream;Import java.io.FileNotFoundException;Import Java.io.FileOutputStream;Import java.io.IOException;Import Java.io.InputStream;Import Java.util.Iterator;Import

In the program we use methods to implement the operation of the object, but the object may have different data types, at this time for different data types, the same operation, we can use the method of overloading, that is, the method name is the

Recently engaged in a company Web project, need to download network pictures, and then re-pick up some of the most basic things, various streams of data transmission, simple to get a very convenient download network Image example, the code is very

ImportJava.util.concurrent.CountDownLatch;ImportJava.util.concurrent.ExecutorService;Importjava.util.concurrent.Executors;/*** Simulation of the 100-meter race, 10 players are ready, only waiting for the referee commanded. When everyone gets to the

See a very interesting situation today, if you want to use the ToString method to return the address of the object, you might consider using the This keyword, but this time there will be a problem, the compiler sees a string object followed by a "+"

Java Object Entry is a reference (a piece of memory), the underlying type is the value (copy content), the test code is as follows Public class TestA { private String name; Public String GetName () { return name; } Public

When defining a variable with a class name, the definition should be just a reference, which can be used to access properties and methods within the class, and should there be a reference in the class to access its properties and methods? Oh, Java

The role of a member in a class is modified by the static:1. Members (member variables and member methods) that are static decorated within a class can be called directly from the class name.2. Variables in a class that are modified by static are

PackageKpp.search;/*** Binary search * for ordered sequences *@authorKPP **/ Public classBinarySearch { Public Static voidMain (string[] args) {//TODO auto-generated Method Stub intData[] = {1,2,3,4,5,6,7,8,9,10}; intKey = 2; intindex =search

PackageKpp.sort;/*** Quick Sort * General selection of the first element as the pivot element, save to pivot, determine the head and tail pointer left,right, * First order the entire array element, when the elements on both sides of the pivot

We sometimes need to get the root path of the web in the Java class (including the Util class, etc.), which can be obtained through the class Classpath:public static String Getrealpath (Class clazz) {string url = Clazz.getresource (""). GetPath ();

Java report tool FineReport Common Errors and solutions (3), javafinereportI hope that you can solve your own problems and solve them. Mark them to benefit yourself.   If any problem occurs, first search for the document, and then check whether du

How to correctly use Java Event Notifications (1) It seems that implementing the observer mode to provide Java event notification is not difficult, but it is also easy to fall into some traps. This article describes some common mistakes that I

How to Improve the Performance of Java locks (1) We try our best to find a solution to the problems encountered by our products, but I will share with you several common technologies in this article, these technologies include separating locks,

Implementation of loading an animation  I remember seeing an animation design above, and I tried to implement it. First, we can see that the animation is composed of two parts, one circle rotates clockwise, and the other is the linear movement of

Remove the space at both ends of the string trimSpaceThere is a string with n spaces ("abcdefgdddd") at the beginning or end. To remove the leading and trailing spaces, a new string is returned. Int trimSpace (char * bufscr, char * bufdes) {int I =

Chinese garbled characters during development, and Chinese garbled Characters During Development For programmers, Garbled text is really a headache. Below are several common Garbled text.1. garbled characters due to inconsistent database

Maven, maven3 There are several people who have just used Maven to say-in a project called "pom. if you declare a dependency in the xml file, you do not need to manually add the jar file. It is not much different from manually managing the

Tools related to asynchronous networks: HttpUtilsTools related to asynchronous Networks Package com. flyou. utils; import java. io. bufferedReader; import java. io. byteArrayOutputStream; import java. io. IOException; import java. io. inputStream;

Java multi-thread and concurrent programming knowledge points 1. thread status 1.1 two ways to create a thread: interface and Thread class. Advantages of Using Interfaces: it better reflects the object-oriented thinking and avoids the limitations