Java

Step1: 編寫java類,e.g.://filename: HelloWorld.javapublic class HelloWorld{public native void displayHelloWorld();public native int add(int a,int b);static {System.loadLibrary("hello");}public static void main(String[] args){HelloWorld hw=new

//TestCollect .javapackage com.test;public class TestCollect {private String name;private int age;public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {

    Cooperation between tasksAs you’ve seen, when you use threads to run more than one task at a time, you can keep one task from interfering with another task’s resources by using a lock (mutex) to synchronize the behavior of the two tasks. That is,

package com.cg.tests;import java.util.regex.Matcher;import java.util.regex.Pattern;import org.junit.Test;public class TestPatternMatcher {@Testpublic void TestReplaceAll(){String s="Hello World ...";String s2=s.replaceAll("\\.",

from:http://www.rgagnon.com/javadetails/java-0438.htmlSome notes from A. Gonzales about String.split()Special cases using String.split():public class StringSplit { public static void main(String args[]) throws Exception{ System.out.println(

http://java.decompiler.free.fr/The “Java Decompiler project” aims to develop tools in order to decompile and analyze Java 5 “byte code” and the later versions.JD-Core is a library that reconstructs Java source code from one or more “.class” files.

package com.cg.test;import java.nio.charset.Charset;import java.util.Iterator;import java.util.Map;import java.util.Set;import org.apache.commons.codec.binary.Hex;public class HexString { /** * @param args */ public static void

public class Outer {    private int index = 100;    public void func(final int a) {        final int b = 0;//只有 fianl 才可以被函數裡面的內部類訪問        class Middle {            private int index = 101;            class Inner {                private int index =

關鍵字說明●  ? 萬用字元類型●  <? extends T> 表示類型的上界，表示參數化型別的可能是T 或是 T的子類●  <? super T> 表示類型下界（Java Core中叫超類型限定），表示參數化型別是此類型的超類型（父類型），直至Objectextends 樣本 static class Food{} static class Fruit extends Food{} static class Apple extends Fruit{}

 JAVA從J2SE5開始提供名為annotation（注釋，標註）的功能。Java的annotation，可以附加在package, class, method, field等上面，相當於給它們添加了額外的輔助資訊。附加在package, class, method, field等上的Annotation，如果沒有外部解析工具等對其加以解析和處理的情況，本身不會對Java的原始碼或class等產生任何影響，也不 會對它們的執行產生任何影響。

AnnotationAnnotaions (also known as metadata) provide a formalized way to add information to yourcode so that you can easily use that data at some later point.Defining annotationsHere is the definition of the annotation above. You can see that

轉自：http://www.ibm.com/developerworks/cn/java/j-jtp06197.html簡介： Java 語言套件含兩種內在的同步機制：同步塊（或方法）和 volatile 變數。這兩種機制的提出都是為了實現代碼線程的安全性。其中 Volatile 變數的同步性較差（但有時它更簡單並且開銷更低），而且其使用也更容易出錯。在這期的 Java 理論與實踐 中，Brian Goetz 將介紹幾種正確使用 volatile

package dynamicproxy;public interface SimpleInterface {void doSth();void doSthElse(String s);}  package dynamicproxy;public class RealObject implements SimpleInterface {@Overridepublic void doSth() {System.out.println("Real Object do

//TestLock.javapackage com.test.thread;import java.util.ArrayList;import java.util.List;import java.util.concurrent.ExecutionException;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import

Where storage lives1.Registers2.The stack3.The heap4.Constant storage5.Non-RAM storagejava Primitive type:  Wrapper type1.booleanBoolean2.char 16 bitsCharacter3.byte 8 bitsByte4.short 16 bitsShort5.int 32 bitsInteger6.long 64 bitsLong7.float 32

1.被代理對象的介面:package test.dynamicproxy;public interface TargetInterface {public void SayHello();public int sum(int a ,int b);} 2.被代理的對象:package test.dynamicproxy;public class Target implements TargetInterface {public void SayHello(){System.out.println(

DOM,SAX和JAXPDOM: Document Object ModelSAX: Simple API for XML 有沒有辦法讓我們在更換解析器時,不用對己發布的程式做任何改動呢?JAXP API可以協助我們實現這一點.為了屏蔽具體廠商的實現,讓java開發人員以一種標準的方式對XML進行編程,SUN公司制定了JAXP(Java API for XML

http://www.codeproject.com/KB/java/woxserializer.aspxThis article explains how to use WOX to serialize Java objects to XML. One of its main features is the generation of standard XML, which is language independant.IntroductionThis article explains

package com.xx.tests;import java.util.HashMap;import java.util.Map;public enum Season {Spring {@Overridepublic String toString() {return "春天";}},Summer{@Overridepublic String toString() {return "夏天";}},Autumn{@Overridepublic String toString()

//TCPServer.javapackage msb.demo.socket;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.IOException;import java.net.ServerSocket;import java.net.Socket;import java.util.Date;public class TCPServer {/** * @param args *