[
{
"path": ".idea/.name",
"content": "JavaLearning"
},
{
"path": ".idea/compiler.xml",
"content": "\n\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n"
},
{
"path": ".idea/copyright/profiles_settings.xml",
"content": "\n \n"
},
{
"path": ".idea/encodings.xml",
"content": "\n\n \n \n \n"
},
{
"path": ".idea/misc.xml",
"content": "\n\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n"
},
{
"path": ".idea/modules.xml",
"content": "\n\n \n \n \n \n \n"
},
{
"path": ".idea/uiDesigner.xml",
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{
"path": ".idea/vcs.xml",
"content": "\n\n \n \n \n"
},
{
"path": ".idea/workspace.xml",
"content": "\n\n \n
\n \n \n \n \n \n \n \n \n \n \n \n \n \n com.crow.*\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n
\n \n \n
\n \n \n \n \n \n \n \n \n \n 1486393746329\n \n 1486393746329\n \n \n 1487217889886\n \n \n 1487217889886\n \n \n 1487234520435\n \n \n 1487234520435\n \n \n 1487234799472\n \n \n 1487234799472\n \n \n 1487592431820\n \n \n 1487592431820\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n No facets are configured\n \n \n \n \n \n \n \n scala-sdk-2.11.7\n \n \n \n \n \n \n \n 1.8\n \n \n \n \n \n \n \n jdk5-new\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n"
},
{
"path": "BasicJava.iml",
"content": "\n\n \n \n \n \n \n \n \n \n \n \n \n"
},
{
"path": "Enumeration/Enumeration.iml",
"content": "\n\n \n \n \n \n \n \n \n \n \n \n \n \n"
},
{
"path": "Enumeration/pom.xml",
"content": "\n \n Basic-Java\n com.crow\n 1.0-SNAPSHOT\n \n 4.0.0\n\n Enumeration\n jar\n\n Enumeration\n http://maven.apache.org\n\n \n UTF-8\n \n\n \n \n junit\n junit\n 3.8.1\n test\n \n \n\n"
},
{
"path": "Enumeration/src/main/java/com/crow/EnumCoin.java",
"content": "package com.crow;\n\n/**\n * Created by CrowHawk on 17/2/12.\n */\n\npublic abstract class EnumCoin {//Implement an Enum with a common class\n private int tag;\n private EnumCoin(int tag){\n this.tag = tag;\n }\n public static final EnumCoin OBCERSE = new EnumCoin(1){//an object of an inner class extending EnumCoin\n public EnumCoin enumNext(){\n return BACK;\n }\n };\n public static final EnumCoin BACK = new EnumCoin(0){\n public EnumCoin enumNext(){\n return OBCERSE;\n }\n };\n\n public String toString(){\n return this == OBCERSE?\"Obcerse\":\"Back\";\n }\n\n/* public EnumCoin enumNext(){\n if(this == OBCERSE){\n return BACK;\n }\n else{\n return OBCERSE;\n }\n }*/\n\n public abstract EnumCoin enumNext();\n}"
},
{
"path": "Enumeration/src/main/java/com/crow/EnumTest.java",
"content": "package com.crow;\n\n/**\n * Created by CrowHawk on 17/2/12.\n */\n\npublic class EnumTest {\n public static void main(String[] args) {\n EnumCoin obcerse = EnumCoin.OBCERSE;\n System.out.println(\"The other side of the Obcerse is \" + obcerse.enumNext().toString());\n }\n}\n"
},
{
"path": "Generic/Generic.iml",
"content": "\n\n \n \n \n \n \n \n \n \n \n \n \n \n"
},
{
"path": "Generic/pom.xml",
"content": "\n \n Basic-Java\n com.crow\n 1.0-SNAPSHOT\n \n 4.0.0\n\n Generic\n jar\n\n Generic\n http://maven.apache.org\n\n \n UTF-8\n \n\n \n \n junit\n junit\n 3.8.1\n test\n \n \n\n"
},
{
"path": "Generic/src/main/java/com/crow/GenericTest.java",
"content": "package com.crow;\n\n/**\n * Created by CrowHawk on 17/2/16.\n */\n\n\nimport java.lang.reflect.Method;\nimport java.lang.reflect.ParameterizedType;\nimport java.lang.reflect.Type;\nimport java.util.HashMap;\nimport java.util.Iterator;\nimport java.util.Map;\nimport java.util.Set;\n\npublic class GenericTest {\n public static void main(String[] args) throws Exception{\n HashMap hashMap = new HashMap();\n hashMap.put(\"Tom\", 1);\n hashMap.put(\"Jerry\", 2);\n hashMap.put(\"Nick\", 3);\n printHashmap(hashMap);\n\n String[] array = new String[]{\"crow\",\"martin\",\"pattie\"};\n swap(array, 1, 2);\n System.out.println(\"array[2] = \" + array[2]);\n\n //用反射的方法获取printHashmap方法的参数并打印\n Method printMethod = GenericTest.class.getMethod(\"printHashmap\", HashMap.class);\n Type[] types = printMethod.getGenericParameterTypes();\n ParameterizedType parameterizedType = (ParameterizedType)types[0];\n Type[] actualTypes = parameterizedType.getActualTypeArguments();\n System.out.println(\"The paratype is \" + parameterizedType.getRawType() + \"<\" + actualTypes[0] + \",\" + actualTypes[1] + \">\");\n }\n\n\n public static void printHashmap(HashMap hashMap){//遍历HashMap并打印其内容\n Set> entrySet = hashMap.entrySet();\n for(Map.Entry entry: entrySet){\n System.out.println(entry.getKey() + \",\" + entry.getValue());\n }\n Iterator> iter = entrySet.iterator();\n while(iter.hasNext()){\n Map.Entry entry = iter.next();\n System.out.print(\"Key is \" + entry.getKey() + \",\");\n System.out.println(\"Value is \" + entry.getValue());\n }\n }\n\n public static void swap(T[] arr, int i, int j){//交换泛型数组中的任意两个元素\n T tmp = arr[i];\n arr[i] = arr[j];\n arr[j] = tmp;\n }\n}\n"
},
{
"path": "JNAPointer/JNAPointer.java",
"content": "import com.sun.jna.*;\nimport com.sun.jna.ptr.*;\n\npublic class JNAPointer {\n\n\t/**\n\t * @param args\n\t */\n\tpublic interface CLib extends Library{\n\t\n\t\tpublic interface OpenFunc extends Callback{\n\t\t\tvoid invoke ( IntByReference p1);\n\t\t\t//void invoke(String filename , int i);\n\t\t}\n\t\t\n\t\tpublic class FunCallBack implements OpenFunc{\n\t\t\t@Override\n\t\t\t/*public void invoke(String filename , int i){\n\t\t\t\tSystem.out.println(\"callback called.\");\n\t\t\t\tSystem.out.println(filename);\n\t\t\t}*/\n\t\t\t public void invoke( IntByReference p1){\n\t\t\t\t\n \t\t\t\tSystem.out.println(p1);\n\t\t\t\tSystem.out.println(\"callback called.\");\n\t\t\t}\n\t\t}\n\t\t\n\t\tvoid init(OpenFunc openfunc);\n\t\tvoid swap( IntByReference p1 , IntByReference p2);\n\t\tvoid test();\n\t}\n\t\n\tpublic static void main(String[] args) {\n\t\n\t\tCLib lib =(CLib)Native.loadLibrary(\"JNALib\", CLib.class);\n\t\tCLib lib2 = (CLib)Native.loadLibrary(\"swap\",CLib.class);\n\t\tCLib.FunCallBack func = new CLib.FunCallBack();\n\t\tIntByReference p1 = new IntByReference (3);\n\t\tIntByReference p2 = new IntByReference (5);\n\t\tlib.init( func);\n\t lib2.swap(p1, p2);//Java called C++ pointer\n\t\tlib.test();//C++ callback java\n\t}\n}\n"
},
{
"path": "JNAPointer/README.md",
"content": "# JNA Sample\n\n---\n\n**Java用JNA跨语言调用C++指针代码，在C++代码外封装一层C接口**\n**Java将C++指针映射为Pointer类**\n\n+ 先执行cppComplie.sh生成动态链接库\n+ 再执行javarun.sh运行Java程序\n"
},
{
"path": "JNAPointer/callback.cpp",
"content": "#include \n#include \n\nusing namespace std;\n\nextern \"C\"\n{\n\ttypedef void (*OpenFunc) (const char*, int);\n\t\n\tOpenFunc openfunc=NULL;\n\n\tvoid init(OpenFunc func){\n\t\tcout << \"init called\" <\n#include \nusing namespace std;\n\nextern \"C\"{\nvoid swap(int *p1,int *p2);\n\n void swap(int *p1,int *p2){\n\t\tcout << \"p1=\"<< *p1 << \",p2=\" << *p2 <\n\n \n \n \n \n \n \n \n \n \n \n \n \n"
},
{
"path": "NIO/pom.xml",
"content": "\n \n Basic-Java\n com.crow\n 1.0-SNAPSHOT\n \n 4.0.0\n\n NIO\n jar\n\n NIO\n http://maven.apache.org\n\n \n UTF-8\n \n\n \n \n junit\n junit\n 3.8.1\n test\n \n \n\n"
},
{
"path": "NIO/src/main/java/com/crow/CopyFile.java",
"content": "package com.crow;\n\nimport java.io.FileInputStream;\nimport java.io.FileOutputStream;\nimport java.nio.ByteBuffer;\nimport java.nio.channels.FileChannel;\n\n/**\n * Created by CrowHawk on 17/9/4.\n */\npublic class CopyFile {\n public static void main(String[] args) throws Exception {\n if (args.length<2) {\n System.err.println( \"Usage: java CopyFile infile outfile\" );\n System.exit( 1 );\n }\n\n String infile = args[0];\n String outfile = args[1];\n\n FileInputStream fin = new FileInputStream( infile );\n FileOutputStream fout = new FileOutputStream( outfile );\n\n FileChannel fcin = fin.getChannel();\n FileChannel fcout = fout.getChannel();\n\n ByteBuffer buffer = ByteBuffer.allocate( 1024 );\n\n while (true) {\n buffer.clear();\n\n int r = fcin.read(buffer);\n\n if (r == -1) {\n break;\n }\n\n buffer.flip();\n\n fcout.write(buffer);\n }\n }\n}\n"
},
{
"path": "NIO/src/main/java/com/crow/CreateArrayBuffer.java",
"content": "package com.crow;\n\nimport java.nio.ByteBuffer;\n\n/**\n * Created by CrowHawk on 17/9/4.\n */\npublic class CreateArrayBuffer {\n static public void main( String args[] ) throws Exception {\n byte array[] = new byte[1024];\n\n ByteBuffer buffer = ByteBuffer.wrap( array );\n\n buffer.put( (byte)'a' );\n buffer.put( (byte)'b' );\n buffer.put( (byte)'c' );\n\n buffer.flip();\n\n System.out.println( (char)buffer.get() );\n System.out.println( (char)buffer.get() );\n System.out.println( (char)buffer.get() );\n }\n}\n"
},
{
"path": "NIO/src/main/java/com/crow/CreateBuffer.java",
"content": "package com.crow;\n\nimport java.nio.ByteBuffer;\n\n/**\n * Created by CrowHawk on 17/9/4.\n */\npublic class CreateBuffer {\n public static void main( String args[] ) throws Exception {\n ByteBuffer buffer = ByteBuffer.allocate( 1024 );\n\n buffer.put( (byte)'a' );\n buffer.put( (byte)'b' );\n buffer.put( (byte)'c' );\n\n buffer.flip();\n\n System.out.println( (char)buffer.get() );\n System.out.println( (char)buffer.get() );\n System.out.println( (char)buffer.get() );\n }\n}\n"
},
{
"path": "NIO/src/main/java/com/crow/MultiPortEcho.java",
"content": "package com.crow;\n\nimport java.io.IOException;\nimport java.net.InetSocketAddress;\nimport java.net.ServerSocket;\nimport java.nio.ByteBuffer;\nimport java.nio.channels.SelectionKey;\nimport java.nio.channels.Selector;\nimport java.nio.channels.ServerSocketChannel;\nimport java.nio.channels.SocketChannel;\nimport java.util.Iterator;\nimport java.util.Set;\n\n/**\n * Created by CrowHawk on 17/9/4.\n */\npublic class MultiPortEcho {\n private int ports[];\n private ByteBuffer echoBuffer = ByteBuffer.allocate( 1024 );\n\n public MultiPortEcho( int ports[] ) throws IOException {\n this.ports = ports;\n\n go();\n }\n\n private void go() throws IOException {\n\n Selector selector = Selector.open();\n\n // Open a listener on each port, and register each one\n // with the selector\n for (int i=0; i < ports.length; i++) {\n ServerSocketChannel ssc = ServerSocketChannel.open();\n ssc.configureBlocking(false);\n ServerSocket ss = ssc.socket();\n InetSocketAddress address = new InetSocketAddress(ports[i]);\n ss.bind(address);\n\n //将新打开的 ServerSocketChannels 注册到 Selector上，指定监听accept事件\n SelectionKey key = ssc.register(selector, SelectionKey.OP_ACCEPT);\n System.out.println(\"Going to listen on \" + ports[i]);\n }\n\n while (true) {\n int num = selector.select();//返回该选择器中对I/O事件准备就绪的channel对应的key的数量\n Set selectedKeys = selector.selectedKeys();//返回key的集合\n Iterator it = selectedKeys.iterator();\n while (it.hasNext()) {//遍历key集合，集合中的元素为SelectionKey类型\n SelectionKey key = (SelectionKey) it.next();\n if ((key.readyOps() & SelectionKey.OP_ACCEPT)\n == SelectionKey.OP_ACCEPT) {//检查发生了什么类型的事件\n // Accept the new connection\n ServerSocketChannel ssc = (ServerSocketChannel)key.channel();\n SocketChannel sc = ssc.accept();\n sc.configureBlocking( false );\n\n // Add the new connection to the selector\n SelectionKey newKey = sc.register( selector, SelectionKey.OP_READ );//监听read事件\n //Selector不会自己从已选择键集中移除SelectionKey实例。必须在处理完通道时自己移除。下次该通道变成就绪时，Selector会再次将其放入已选择键集中。\n it.remove();\n\n System.out.println( \"Got connection from \"+sc );\n }else if ((key.readyOps() & SelectionKey.OP_READ)\n == SelectionKey.OP_READ) {\n // Read the data\n SocketChannel sc = (SocketChannel)key.channel();\n\n // Echo data\n int bytesEchoed = 0;\n while (true) {\n echoBuffer.clear();\n int r = sc.read( echoBuffer );\n\n if (r<=0) {\n break;\n }\n echoBuffer.flip();\n\n sc.write( echoBuffer );\n bytesEchoed += r;\n }\n\n System.out.println( \"Echoed \"+bytesEchoed+\" from \"+sc );\n\n it.remove();\n }\n }\n }\n }\n\n public static void main( String args[] ) throws Exception {\n if (args.length<=0) {\n System.err.println( \"Usage: java MultiPortEcho port [port port ...]\" );\n System.exit( 1 );\n }\n\n int ports[] = new int[args.length];\n\n for (int i=0; i 0; i++) {\n System.out.println(\"Character\" + i + \": \" + (char)buffer.get());\n }\n fin.close();\n }\n}\n"
},
{
"path": "NIO/src/main/java/com/crow/ScatterGather.java",
"content": "package com.crow;\n\nimport java.net.InetSocketAddress;\nimport java.nio.ByteBuffer;\nimport java.nio.channels.ServerSocketChannel;\nimport java.nio.channels.SocketChannel;\n\n/**\n * Created by CrowHawk on 17/9/4.\n */\npublic class ScatterGather {\n static private final int firstHeaderLength = 2;\n static private final int secondHeaderLength = 4;\n static private final int bodyLength = 6;\n\n static public void main( String args[] ) throws Exception {\n if (args.length!=1) {\n System.err.println( \"Usage: java UseScatterGather port\" );\n System.exit( 1 );\n }\n\n int port = Integer.parseInt( args[0] );\n\n ServerSocketChannel ssc = ServerSocketChannel.open();\n InetSocketAddress address = new InetSocketAddress( port );\n ssc.socket().bind( address );\n\n int messageLength =\n firstHeaderLength + secondHeaderLength + bodyLength;\n\n ByteBuffer buffers[] = new ByteBuffer[3];\n buffers[0] = ByteBuffer.allocate( firstHeaderLength );\n buffers[1] = ByteBuffer.allocate( secondHeaderLength );\n buffers[2] = ByteBuffer.allocate( bodyLength );\n\n SocketChannel sc = ssc.accept();\n\n while (true) {\n\n // Scatter-read into buffers\n int bytesRead = 0;\n while (bytesRead < messageLength) {\n long r = sc.read( buffers );\n bytesRead += r;\n\n System.out.println( \"r \"+r );\n for (int i=0; i < buffers.length; ++i) {\n ByteBuffer bb = buffers[i];\n System.out.println( \"b \" + i + \" \" + bb.position() + \" \" + bb.limit() );\n }\n }\n\n // Process message here\n\n // Flip buffers\n for (int i=0; i\n\n \n \n \n \n \n \n \n \n \n \n \n \n"
},
{
"path": "Proxy/pom.xml",
"content": "\n \n Basic-Java\n com.crow\n 1.0-SNAPSHOT\n \n 4.0.0\n\n Proxy\n jar\n\n Proxy\n http://maven.apache.org\n\n \n UTF-8\n \n\n \n \n junit\n junit\n 3.8.1\n test\n \n \n\n"
},
{
"path": "Proxy/src/main/java/com/crow/Advice.java",
"content": "package com.crow;\n\nimport java.lang.reflect.Method;\n\n/**\n * Created by CrowHawk on 17/2/20.\n */\npublic interface Advice {\n void forwardMethod(Method method);\n void backMethod(Method method);\n}\n"
},
{
"path": "Proxy/src/main/java/com/crow/ImpAdvice.java",
"content": "package com.crow;\n\nimport java.lang.reflect.Method;\n\n/**\n * Created by CrowHawk on 17/2/20.\n */\npublic class ImpAdvice implements Advice {\n long beginTime = 0;\n public void forwardMethod(Method method){\n System.out.println(\"end\");\n beginTime = System.currentTimeMillis();\n }\n\n public void backMethod(Method method){\n System.out.println(\"start\");\n long endTime = System.currentTimeMillis();\n System.out.println(method.getName() + \" running time of \" + (endTime - beginTime));\n }\n}\n"
},
{
"path": "Proxy/src/main/java/com/crow/ProxyTest.java",
"content": "package com.crow;\n\nimport java.lang.reflect.InvocationHandler;\nimport java.lang.reflect.Method;\nimport java.lang.reflect.Proxy;\nimport java.util.ArrayList;\nimport java.util.Collection;\n\n/**\n * Created by CrowHawk on 17/2/20.\n */\npublic class ProxyTest {\n public static void main(String args[]){\n ArrayList target = new ArrayList<>();//创建目标类的实例对象\n ImpAdvice impAdvice = new ImpAdvice();\n Collection proxy = (Collection) getProxy(target, impAdvice);//创建动态类\n proxy.add(\"aa\");\n System.out.println(proxy.size());\n System.out.println(proxy.getClass().getName());\n\n }\n\n public static Object getProxy(final Object target, final Advice advice){\n Object proxy = Proxy.newProxyInstance(\n target.getClass().getClassLoader(),\n target.getClass().getInterfaces(),\n new InvocationHandler() {//动态类通过Invocation类的invoke方法调用目标类所需的方法\n public Object invoke(Object proxy, Method method, Object[] args) throws Exception {\n advice.forwardMethod(method);\n Object retVal = method.invoke(target, args);\n advice.backMethod(method);\n return retVal;\n }\n }\n );\n return proxy;\n }\n\n}\n"
},
{
"path": "README.md",
"content": "# JavaLearning\n本仓库记录了我的Java学习进阶之路,涵盖了Java基础、JDK源码、JVM中的重要知识，附有代码和博客讲解，旨在提供一个Java在线共享学习平台,帮助更多的Java学习者入门进阶。\n\n## 代码目录\n+ [Java基础](https://github.com/CrowHawk/JavaLearning/tree/master/Basic-java)：包括枚举、范型、反射、动态代理的用法；\n+ [JNA](https://github.com/CrowHawk/JavaLearning/tree/master/JNAPointer)：演示了JNA的基本用法，使用Java调用C++代码。\n\n## 博客目录\n### Java基础\n+ [Java基础学习(1)——反射](https://crowhawk.github.io/2017/02/12/basic-java-reflect/)\n+ [Java基础学习(2)——注解](https://crowhawk.github.io/2017/02/13/basic-java-annotation/)\n+ [Java基础学习(3)——泛型](https://crowhawk.github.io/2017/02/21/basic-java-generic/)\n+ [Java基础学习(4)——动态代理](https://crowhawk.github.io/2017/02/21/basic-java-proxy/)\n+ [《Java多线程核心技术》读书笔记](https://crowhawk.github.io/2017/07/06/MultiThread/)\n\n### JDK源码\n+ [Java集合框架源码解读(1)——ArrayList、LinkedList和Vector](https://crowhawk.github.io/2017/08/26/collections_1/)\n+ [Java集合框架源码解读(2)——HashMap](https://crowhawk.github.io/2017/08/27/collections_2/)\n+ [Java集合框架源码解读(3)——LinkedHashMap](https://crowhawk.github.io/2017/08/28/collctions_3/)\n+ [Java集合框架源码解读(4)——WeakHashMap](https://crowhawk.github.io/2017/08/29/collection_4/)\n+ [Java集合框架源码解读(5)——TreeMap](https://crowhawk.github.io/2017/08/31/collection_5/)\n\n### JVM\n+ [深入理解JVM(1)——Java内存区域与Java对象](https://crowhawk.github.io/2017/08/09/jvm_1/)\n+ [深入理解JVM(2)——GC算法与内存分配策略](https://crowhawk.github.io/2017/08/10/jvm_2/)\n+ [深入理解JVM(3)——7种垃圾收集器](https://crowhawk.github.io/2017/08/15/jvm_3/)\n+ [深入理解JVM(4)——如何优化Java GC「译」](https://crowhawk.github.io/2017/08/21/jvm_4/)\n+ [深入理解JVM(5)——虚拟机类加载机制](https://crowhawk.github.io/2017/08/21/jvm_5/)\n+ [深入理解JVM(6)——类加载器](https://crowhawk.github.io/2017/08/21/jvm_6/)\n\n## 联系作者\n[Personal Website：Crow Home](https://crowhawk.github.io/)\n"
},
{
"path": "ReadAndShow.txt",
"content": "Read And Show."
},
{
"path": "Reflect/Reflect.iml",
"content": "\n\n \n \n \n \n \n \n \n \n \n \n \n \n"
},
{
"path": "Reflect/pom.xml",
"content": "\n \n Basic-Java\n com.crow\n 1.0-SNAPSHOT\n \n 4.0.0\n\n Reflect\n jar\n\n Reflect\n http://maven.apache.org\n\n \n UTF-8\n \n\n \n \n junit\n junit\n 3.8.1\n test\n \n \n\n"
},
{
"path": "Reflect/src/main/java/com/crow/FieldReflect.java",
"content": "package com.crow;\n\n\n/**\n * Created by CrowHawk on 17/2/8.\n */\npublic class FieldReflect {\n public int a;\n private int b;\n public String str1 = \"bat\";\n public String str2 = \"but\";\n public String str3 = \"bite\";\n\n public FieldReflect(){}\n public FieldReflect(int a,int b){\n super();\n this.a = a;\n this.b = b;\n }\n @Override\n public String toString(){\n return str1 + \",\" + str2 + \",\" + str3 + \",\" + a + \",\" + b;\n }\n}\n"
},
{
"path": "Reflect/src/main/java/com/crow/ReflectTest.java",
"content": "package com.crow;\n\nimport java.io.IOException;\nimport java.lang.reflect.Constructor;\nimport java.lang.reflect.Field;\n\n\n/**\n * Created by CrowHawk on 17/2/8.\n */\npublic class ReflectTest {\n public static void main(String[] args) throws Exception{\n FieldReflect fr = refConstructor(1,2);\n System.out.println(fr.toString());\n refFieldChange(fr, \"a\");\n System.out.println(\"fr.a = \" + fr.a);\n refFieldChange(fr, \"str1\");\n System.out.println(\"fr.str1 = \" + fr.str1);\n }\n\n public static FieldReflect refConstructor(int a, int b) throws Exception{//使用反射构造器创建对象\n Class[] paralist = {int.class, int.class};\n Constructor cons = FieldReflect.class.getDeclaredConstructor(paralist);\n FieldReflect fr = (FieldReflect) cons.newInstance(a, b);\n return fr;\n }\n\n public static void refFieldChange(FieldReflect fr, String fieldName) throws Exception{\n //使用Field类改变类的实例域,如果是int型,全部设为3,如果是String类型,将String中的\"b\"改为\"c\"\n Field field = fr.getClass().getDeclaredField(fieldName);\n field.setAccessible(true);\n if(field.getType() == int.class){\n field.set(fr, 3);\n }\n else if(field.getType() == String.class) {\n String string = (String) field.get(fr);\n string.replace(\"b\", \"c\");\n field.set(fr, string);\n }\n else {\n throw new IOException();\n }\n }\n}\n"
},
{
"path": "pom.xml",
"content": "\n 4.0.0\n\n com.crow\n Basic-Java\n 1.0-SNAPSHOT\n \n Enumeration\n Generic\n Proxy\n Reflect\n JNA\n NIO\n \n pom\n\n Basic-Java\n http://maven.apache.org\n\n \n UTF-8\n \n\n \n \n junit\n junit\n 3.8.1\n test\n \n \n\n"
}
]