Java

Add components to the framework: eg.JFrame frame=new JFrame ("JFrame add");Java.awt.Container Container=frame.getcontentpane ();//You can return to the contents pane of the frame, the Contents pane is Java.awt.Container instanceJButton jbtok=new

Original address: http://yanwushu.sinaapp.com/?p=48 GIF is a common means of implementing animations in swing. The simplest way to typically display a picture in swing is to call the JButton or JLabel's SetIcon (icon icon) method. However, this

When doing JUnit unit tests, it was found that the execution was previously compiled code.Finally find out why, Src/test/java compiled the. Class path is the Default output folderDefault Output folder:zphvip/src/main/webapp/web-inf/classesSolve1

First, build the Hadoop development environment The various codes that we have written at work are run on the server, and the operation code of HDFS is no exception. In the development phase, we use eclipse under Windows as the development

Spring AOP has always been a relatively unique feature of spring, and it allows us to embed the logic functions we want anywhere in the existing code without changing our existing code structure.In view of this, now the system has completed all the

The Java language Operator Reader jdk1.6 provides a package javax.smartcardio that connects directly to the PCSC reader, and to the reader for instruction InteractionPackage Javax.smartcardio More

the JVM can use 2 different kinds of memory: heap memory and out-of-heap memory, heap memory is fully allocated and freed by the JVM, and if the program does not have defective code causing memory leaks, then you will not encounter

Author: ChingOriginal address: http://blog.csdn.net/qingdujun/article/details/39347245This article demonstrates that tread multithreading implements the Runnable interface and simply explains why there is a way to create threads.First, create a

Self-summary, what is not satisfied with the place, you can help correct the supplement, thank you!Purpose: SimpleDateFormat class can be a very casual combination of date and time format, more than simply yyyy-mm-dd this formatNonsense not much to

multithreading synchronization problem with synchronized keyword in Javain Java, multi-threading synchronization relies on the object lock mechanism, the Synchronized keyword is the use of encapsulating object locks to achieve mutually exclusive

/*abstract class: Abstract: General, vague, can not understand! Not specific. Features: 1, the method is an abstract method, and it needs to be modified only when the declaration is not implemented. Abstract methods must be defined in an abstract

1, what is the generic typeFirst, the essence of generics is type parameterization , the popular saying is to use a variable to represent the type, the type can be string,integer and so on indeterminate, indicating acceptable type , the principle is

----------------------------------------------------Package Org.rui.thread.concurrency;import Java.io.ioexception;import Java.io.inputstream;import Java.util.concurrent.executorservice;import Java.util.concurrent.executors;import

Ext.: http://www.cnblogs.com/gulvzhe/archive/2012/01/27/2330001.html————————————————————————————————————————————————Java reflection mechanism is in the running state, for any class , can know all the properties and methods of this class, for any one

Transferred from: http://www.cnblogs.com/nerxious/archive/2013/01/25/2876489.htmlAnonymous inner class is also an inner class without a nameBecause there is no name, the anonymous inner class can only be used once, and it is often used to simplify

Java uses Runtime to call code blocked by external programs. javaruntime Sometimes some external programs are called in java code, such as SwfTools to convert swf and ffmpeg to convert videos. If your code is written as follows:

Demo of class reflection mechanism + responsibility chain design modeDirectly paste the Code:Reflection ToolkitPackage com.zzk.cn;Import java. lang. reflect. Method;Import java. util. List;/*** Object processing class** @ Author zhengke. zzk*/Public

Inheritance of three features of object-oriented (extends) -- Java notes (6), extendsjavaInheritance: a general-to-special relationship is an extended relationship. The subclass object is a type of parent class, also known as the generalization of

Java multithreading notes (2) and java multithreading notes The difficulty of java multithreading lies in the communication between multiple threads during synchronization and concurrent running. When processing thread synchronization, java commonly

Java 4 Android: all objects (1) We always like to use C ++ and Java for comparison. Although I have used both of them, I forget them. My first job gave me the oldest language (relative to the two) C. Of course, the conversion from the downloaded