Java

Given two sorted arrays A and B, where the end of a has enough space to hold B, write a method to merge B into a and sort. When you get this question, the most immediate idea is to compare the elements in A and B, and insert the array in order

In concurrent programs, programmers pay special attention to data synchronization between different processes or threads, especially when multiple threads modify the same variable at the same time, must take reliable synchronization or other

The specific steps are as follows:1, put Smslib-3.3.0b2.jar, Comm.jar and Log4j-1.2.11.jar, put into the project Lib;2, put the javax.comm.properties under the%java_home%/jre/lib;3, put the win32com.dll under the%java_home%/jre/bin;4 Put the

Haven't written code for a long time, also haven't updated my blog for a long time, last night wrote this filter file name of the program, then sent the ~ /*name:filenamefilter *author:runzhen Wang *date:2009/11/04 * * import

JSON is a common delivery format and is a format that corresponds to a key value. And the data size will be relatively small, easy to pass. Therefore, JSON is often used in development. First look at the format of JSON:

Realize the idea: 1, using the Java.net.URL object, binding the address of a Web page on the network 2, through the Java.net.URL object OpenConnection () method to obtain a Httpconnection object 3, through the Httpconnection object's

This article describes the concept of the transformation of Java objects, shared for everyone to reference. The specific methods are as follows: Object Transformation (casting) The following considerations: 1, a reference type variable of a base

The example of this article tells the Java method rewrite, share for everybody for reference. The specific analysis is as follows: An overview of the methods of rewriting: 1. In subclasses, you can override the methods inherited from the base

To get a better understanding, let's look at the following example: Package com.yonyou.test; Import java.util.ArrayList; Import Java.util.Iterator; Import java.util.List; /** * Test class * @author cloud-dwelling Community * @

We've used several collect () methods to spell the elements returned by the stream as ArrayList. This is a reduce operation that is useful for converting a set to another type (usually a mutable set). The Collect () function, if used in conjunction

This article describes how to quickly construct an XML fragment in Java programming, and then output the XML. XML is often used in the day-to-day use of Java development. XML is easy to use, but write annoying, there is no very simple construction

This example shows Java using the Setasciistream () method to retrieve the instance code of the database. Parameter queries must assign values to parameters before they are executed by using the PreparedStatement object's SetBoolean (), Setint (),

Object-oriented programs are composed of objects, each containing a specific part of the functionality exposed to the user and a hidden implementation part. In object-oriented programming (OOP), it is not necessary to care about the concrete

The intermediary pattern of the Java design pattern is one of the behavioral patterns. Defines a mediation object to encapsulate the interaction between series objects. Intermediaries do not need to refer explicitly to each other, so that they are

We are still the same as the original, talk about the idea of doing reptiles and need to prepare the knowledge of it, experts please directly ignore. First we have a wisp of thoughts, think about what to do, make a simple demand. Requirements are

Implement multithreading by inheriting THEAD classes: Advantages: Simple to write, if you need to access the current thread, just use this, no need to use the Thead.currentthread () method. Disadvantage: Because this thread class has inherited the

public interface Array The mapping relationship of SQL type ARRAY in the Java programming language. By default, the array value is a transaction period reference to the SQL Array value. By default, the array object is implemented using SQL LOCATOR (

Conceptfirst, let's look at the set set. Set is an interface that inherits from collection. It is a collection that is not allowed to have duplicate elements.Abstractset is an abstract class that inherits from

One, the heavy lock In the last article, we introduced the usage of synchronized and the principle of its realization. Now we should know that synchronized is implemented through one of the object's internal call monitor locks. But the nature of

This article introduces some knowledge points of the Synchronized keyword in Java multithreading as Object lock. The so-called object lock, is synchronized to an object lock. About Object locks refer to: This article First, analysis Synchronized