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Java7的新特性

Java语言特性系列

Java5的新特性
Java6的新特性
Java7的新特性
[Java8的新特性]()
[Java9的新特性]()

序

本文主要讲Java7的新特性，相对于Java6而言，Java7增加了一些重要的特性，比如NIO2，不像Java6那么鸡肋，也算是一个重要的版本。

特性列表

suppress异常( 新语法 )
捕获多个异常(新语法)
try-with-resources(新语法)
JSR341-Expression Language Specification(新规范)
JSR203-More New I/O APIs for the Java Platform(新规范)
JSR292与InvokeDynamic
支持JDBC4.1规范
Path接口、DirectoryStream、Files、WatchService
jcmd
fork/join framework
Java Mission Control

1、suppress异常( `新语法` )

/**  * 记录异常，不被淹没  * addSuppressed  */ class ReadFile {     public void read(String filename) throws BaseException {         FileInputStream input = null;         IOException readException = null;         try {             input = new FileInputStream(filename);         } catch (IOException ex) {             readException = ex;         } finally {             if (input != null) {                 try {                     input.close();                 } catch (IOException ex) {                     if (readException == null) {                         readException = ex;                     }else{                         //使用java7的                         readException.addSuppressed(ex);                     }                 }             }             if (readException != null) {                 throw new BaseException(readException);             }         }     } }

2、捕获多个异常( `新语法` )

public void handle() {         ExceptionThrower thrower = new ExceptionThrower();         try {             thrower.manyExceptions();         } catch (ExceptionA | ExceptionB ab) {             System.out.println(ab.getClass());         } catch (ExceptionC c) {         }     }

3、try-with-resources( `新语法` )

/**  * try-with-resource  * 不需要使用finally来保证打开的流被正确关闭  * 这是自动完成的。  * @author patterncat  * @created 2014-07-21  */ public class ResourceBasicUsage {     public String readFile(String path) throws IOException {         try (BufferedReader reader = new BufferedReader(new FileReader(path))) {             StringBuilder builder = new StringBuilder();             String line = null;             while ((line = reader.readLine()) != null) {                 builder.append(line);                 builder.append(String.format("%n"));             }             return builder.toString();         }     } }

实现AutoCloseable

/**  * @author patterncat  * @created 2014-07-21  */ public class CustomResource  implements AutoCloseable {     public void close() throws Exception {         System.out.println("进行资源释放。");     }     public void useCustomResource() throws Exception {         try (CustomResource resource = new CustomResource())  {             System.out.println("使用资源。");         }     }     public static void main(String[] args) {         try {             new CustomResource().useCustomResource();         } catch (Exception ex) {             ex.printStackTrace();         }     } }

4、JSR341-Expression Language Specification( `新规范` )

public static void main(String[] args){         ELProcessor el = new ELProcessor();         assert (el.eval("Math.random()") instanceof Double);     }

5、JSR203-More New I/O APIs for the Java Platform( `新规范` )

bytebuffer

public class ByteBufferUsage {     public void useByteBuffer() {         ByteBuffer buffer = ByteBuffer.allocate(32);         buffer.put((byte)1);         buffer.put(new byte[3]);         buffer.putChar('A');         buffer.putFloat(0.0f);         buffer.putLong(10, 100L);         System.out.println(buffer.getChar(4));         System.out.println(buffer.remaining());     }     public void byteOrder() {         ByteBuffer buffer = ByteBuffer.allocate(4);         buffer.putInt(1);         buffer.order(ByteOrder.LITTLE_ENDIAN);         buffer.getInt(0); //值为16777216     }     public void compact() {         ByteBuffer buffer = ByteBuffer.allocate(32);         buffer.put(new byte[16]);         buffer.flip();         buffer.getInt();         buffer.compact();         int pos = buffer.position();     }     public void viewBuffer() {         ByteBuffer buffer = ByteBuffer.allocate(32);         buffer.putInt(1);         IntBuffer intBuffer = buffer.asIntBuffer();         intBuffer.put(2);         int value = buffer.getInt(); //值为2     }     /**      * @param args the command line arguments      */     public static void main(String[] args) {         ByteBufferUsage bbu = new ByteBufferUsage();         bbu.useByteBuffer();         bbu.byteOrder();         bbu.compact();         bbu.viewBuffer();     } }

filechannel

public class FileChannelUsage {     public void openAndWrite() throws IOException {         FileChannel channel = FileChannel.open(Paths.get("my.txt"), StandardOpenOption.CREATE, StandardOpenOption.WRITE);         ByteBuffer buffer = ByteBuffer.allocate(64);         buffer.putChar('A').flip();         channel.write(buffer);     }     public void readWriteAbsolute() throws IOException {         FileChannel channel = FileChannel.open(Paths.get("absolute.txt"), StandardOpenOption.READ, StandardOpenOption.CREATE, StandardOpenOption.WRITE);         ByteBuffer writeBuffer = ByteBuffer.allocate(4).putChar('A').putChar('B');         writeBuffer.flip();         channel.write(writeBuffer, 1024);         ByteBuffer readBuffer = ByteBuffer.allocate(2);         channel.read(readBuffer, 1026);         readBuffer.flip();         char result = readBuffer.getChar(); //值为'B'     }     /**      * @param args the command line arguments      */     public static void main(String[] args) throws IOException {         FileChannelUsage fcu = new FileChannelUsage();         fcu.openAndWrite();         fcu.readWriteAbsolute();     } }

6、JSR292与InvokeDynamic

JSR 292: Supporting Dynamically Typed Languages on the JavaTM Platform，支持在JVM上运行动态类型语言。在字节码层面支持了InvokeDynamic。

方法句柄MethodHandle

public class ThreadPoolManager {     private final ScheduledExecutorService stpe = Executors             .newScheduledThreadPool(2);     private final BlockingQueue<WorkUnit<String>> lbq;     public ThreadPoolManager(BlockingQueue<WorkUnit<String>> lbq_) {         lbq = lbq_;     }     public ScheduledFuture<?> run(QueueReaderTask msgReader) {         msgReader.setQueue(lbq);         return stpe.scheduleAtFixedRate(msgReader, 10, 10, TimeUnit.MILLISECONDS);     }     private void cancel(final ScheduledFuture<?> hndl) {         stpe.schedule(new Runnable() {             public void run() {                 hndl.cancel(true);             }         }, 10, TimeUnit.MILLISECONDS);     }     /**      * 使用传统的反射api      */     public Method makeReflective() {         Method meth = null;         try {             Class<?>[] argTypes = new Class[]{ScheduledFuture.class};             meth = ThreadPoolManager.class.getDeclaredMethod("cancel", argTypes);             meth.setAccessible(true);         } catch (IllegalArgumentException | NoSuchMethodException                 | SecurityException e) {             e.printStackTrace();         }         return meth;     }     /**      * 使用代理类      * @return      */     public CancelProxy makeProxy() {         return new CancelProxy();     }     /**      * 使用Java7的新api，MethodHandle      * invoke virtual 动态绑定后调用 obj.xxx      * invoke special 静态绑定后调用 super.xxx      * @return      */     public MethodHandle makeMh() {         MethodHandle mh;         MethodType desc = MethodType.methodType(void.class, ScheduledFuture.class);         try {             mh = MethodHandles.lookup().findVirtual(ThreadPoolManager.class,                     "cancel", desc);         } catch (NoSuchMethodException | IllegalAccessException e) {             throw (AssertionError) new AssertionError().initCause(e);         }         return mh;     }     public static class CancelProxy {         private CancelProxy() {         }         public void invoke(ThreadPoolManager mae_, ScheduledFuture<?> hndl_) {             mae_.cancel(hndl_);         }     } }

调用

public class ThreadPoolMain {     /**      * 如果被继承，还能在静态上下文寻找正确的class      */     private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());     private ThreadPoolManager manager;     public static void main(String[] args) {         ThreadPoolMain main = new ThreadPoolMain();         main.run();     }     private void cancelUsingReflection(ScheduledFuture<?> hndl) {         Method meth = manager.makeReflective();         try {             System.out.println("With Reflection");             meth.invoke(hndl);         } catch (IllegalAccessException | IllegalArgumentException                 | InvocationTargetException e) {             e.printStackTrace();         }     }     private void cancelUsingProxy(ScheduledFuture<?> hndl) {         CancelProxy proxy = manager.makeProxy();         System.out.println("With Proxy");         proxy.invoke(manager, hndl);     }     private void cancelUsingMH(ScheduledFuture<?> hndl) {         MethodHandle mh = manager.makeMh();         try {             System.out.println("With Method Handle");             mh.invokeExact(manager, hndl);         } catch (Throwable e) {             e.printStackTrace();         }     }     private void run() {         BlockingQueue<WorkUnit<String>> lbq = new LinkedBlockingQueue<>();         manager = new ThreadPoolManager(lbq);         final QueueReaderTask msgReader = new QueueReaderTask(100) {             @Override             public void doAction(String msg_) {                 if (msg_ != null)                     System.out.println("Msg recvd: " + msg_);             }         };         ScheduledFuture<?> hndl = manager.run(msgReader);         cancelUsingMH(hndl);         // cancelUsingProxy(hndl);         // cancelUsingReflection(hndl);     } }

7、支持JDBC4.1规范

abort方法

public class AbortConnection {     public void abortConnection() throws SQLException {         Connection connection = DriverManager                 .getConnection("jdbc:derby://localhost/java7book");         ThreadPoolExecutor executor = new DebugExecutorService(2, 10, 60,                 TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());         connection.abort(executor);         executor.shutdown();         try {             executor.awaitTermination(5, TimeUnit.MINUTES);             System.out.println(executor.getCompletedTaskCount());         } catch (InterruptedException e) {             e.printStackTrace();         }     }     private static class DebugExecutorService extends ThreadPoolExecutor {         public DebugExecutorService(int corePoolSize, int maximumPoolSize,                 long keepAliveTime, TimeUnit unit,                 BlockingQueue<Runnable> workQueue) {             super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue);         }         public void beforeExecute(Thread t, Runnable r) {             System.out.println("清理任务：" + r.getClass());             super.beforeExecute(t, r);         }     }     public static void main(String[] args) {         AbortConnection ca = new AbortConnection();         try {             ca.abortConnection();         } catch (SQLException e) {             e.printStackTrace();         }     } }

自动关闭

public class SetSchema {     public void setSchema() throws SQLException {         try (Connection connection = DriverManager                 .getConnection("jdbc:derby://localhost/java7book")) {             connection.setSchema("DEMO_SCHEMA");             try (Statement stmt = connection.createStatement();                     ResultSet rs = stmt.executeQuery("SELECT * FROM author")) {                 while (rs.next()) {                     System.out.println(rs.getString("name"));                 }             }         }     }     public static void main(String[] args) {         SetSchema ss = new SetSchema();         try {             ss.setSchema();         } catch (SQLException e) {             e.printStackTrace();         }     } }

自动映射

public class UseSQLData {          public void useSQLData() throws SQLException {         try (Connection connection = DriverManager                 .getConnection("jdbc:derby://localhost/java7book")) {             Map<String,Class<?>> typeMap = new HashMap<String,Class<?>>();             typeMap.put("java7book.Book", Book.class);             try (Statement stmt = connection.createStatement();                     ResultSet rs = stmt.executeQuery("SELECT * FROM book")) {                 while (rs.next()) {                     System.out.println(rs.getObject(1, Book.class));                 }             }         }     }          public static void main(String[] args) {         UseSQLData usd = new UseSQLData();         try {             usd.useSQLData();         } catch (SQLException e) {             e.printStackTrace();         }     } }

8、Path接口( `重要接口更新` )

public class PathUsage {     public void usePath() {         Path path1 = Paths.get("folder1", "sub1");         Path path2 = Paths.get("folder2", "sub2");         path1.resolve(path2); //folder1/sub1/folder2/sub2         path1.resolveSibling(path2); //folder1/folder2/sub2         path1.relativize(path2); //../../folder2/sub2         path1.subpath(0, 1); //folder1         path1.startsWith(path2); //false         path1.endsWith(path2); //false         Paths.get("folder1/./../folder2/my.text").normalize(); //folder2/my.text     }     /**      * @param args the command line arguments      */     public static void main(String[] args) {         PathUsage usage = new PathUsage();         usage.usePath();     } }

9、DirectoryStream

public class ListFile {     public void listFiles() throws IOException {         Path path = Paths.get("");         try (DirectoryStream<Path> stream = Files.newDirectoryStream(path, "*.*")) {             for (Path entry: stream) {                 //使用entry                 System.out.println(entry);             }         }     }     /**      * @param args the command line arguments      */     public static void main(String[] args) throws IOException {         ListFile listFile = new ListFile();         listFile.listFiles();     } }

10、Files

public class FilesUtils {     public void manipulateFiles() throws IOException {         Path newFile = Files.createFile(Paths.get("new.txt").toAbsolutePath());         List<String> content = new ArrayList<String>();         content.add("Hello");         content.add("World");         Files.write(newFile, content, Charset.forName("UTF-8"));         Files.size(newFile);         byte[] bytes = Files.readAllBytes(newFile);         ByteArrayOutputStream output = new ByteArrayOutputStream();         Files.copy(newFile, output);         Files.delete(newFile);     }     /**      * @param args the command line arguments      */     public static void main(String[] args) throws IOException {         FilesUtils fu = new FilesUtils();         fu.manipulateFiles();     } }

11、WatchService

public class WatchAndCalculate {     public void calculate() throws IOException, InterruptedException {         WatchService service = FileSystems.getDefault().newWatchService();         Path path = Paths.get("").toAbsolutePath();         path.register(service, StandardWatchEventKinds.ENTRY_CREATE);         while (true) {             WatchKey key = service.take();             for (WatchEvent<?> event : key.pollEvents()) {                 Path createdPath = (Path) event.context();                 createdPath = path.resolve(createdPath);                 long size = Files.size(createdPath);                 System.out.println(createdPath + " ==> " + size);             }             key.reset();         }     }     /**      * @param args the command line arguments      */     public static void main(String[] args) throws Throwable {         WatchAndCalculate wc = new WatchAndCalculate();         wc.calculate();     } }

12、jcmd utility

jcmd是为了替代jps出现了，包含了jps的大部分功能并新增了一些新的功能。

jcmd -l列出所有的Java虚拟机，针对每一个虚拟机可以使用help列出它们支持的命令。

jcmd -l 15308 org.eclipse.jetty.xml.XmlConfiguration /tmp/start4070493346048555702.properties /opt/educat/apps/conf/jetty8.xml 5624 sun.tools.jcmd.JCmd -l 20967 org.apache.flume.node.Application --no-reload-conf -f /opt/educat/flume_agent/conf/flume.conf -n log_agent

jcmd pid help

jcmd 15308 help 15308: The following commands are available: VM.commercial_features ManagementAgent.stop ManagementAgent.start_local ManagementAgent.start Thread.print GC.class_histogram GC.heap_dump GC.run_finalization GC.run VM.uptime VM.flags VM.system_properties VM.command_line VM.version help For more information about a specific command use 'help <command>'.

jcmd pid VM.flags查看启动参数

jcmd 15308 VM.flags 15308: -XX:+DisableExplicitGC  -XX:ErrorFile=/var/patterncat/logs/catapp.vmerr.log.201505071655  -XX:+HeapDumpOnOutOfMemoryError  -XX:HeapDumpPath=/var/patterncat/logs/catapp.heaperr.log.201505071655 -XX:InitialHeapSize=5368709120  -XX:+ManagementServer  -XX:MaxGCPauseMillis=100  -XX:MaxHeapSize=5368709120  -XX:MaxPermSize=268435456  -XX:+PrintAdaptiveSizePolicy  -XX:+PrintCommandLineFlags  -XX:+PrintGC  -XX:+PrintGCApplicationStoppedTime  -XX:+PrintGCDateStamps  -XX:+PrintGCDetails  -XX:+PrintGCTimeStamps  -XX:+PrintHeapAtGC  -XX:+PrintTenuringDistribution  -XX:StringTableSize=49999  -XX:+UnlockExperimentalVMOptions  -XX:+UseCompressedOops  -XX:+UseG1GC

jcmd pid GC.heap_dump D:/d.dump 导出堆信息
jcmd pid GC.class_histogram查看系统中类的统计信息
jcmd pid VM.system_properties查看系统属性内容
jcmd pid Thread.print 打印线程栈
jcmd pid VM.uptime 查看虚拟机启动时间
jcmd pid PerfCounter.print 查看性能统计

jcmd 15308 PerfCounter.print 15308: java.ci.totalTime=79326405 java.cls.loadedClasses=19977 java.cls.sharedLoadedClasses=0 java.cls.sharedUnloadedClasses=0 java.cls.unloadedClasses=1443 java.property.java.class.path="/opt/educat/apps/server/jetty-distribution-8.1.9.v20130131/lib/jetty-xml-8.1.9.v20130131.jar:/opt/educat/apps/server/jetty-distribution-8.1.9.v20130131/lib/servlet-api-3.0.jar:/opt/educat/apps/server/jetty-distribution-8.1.9.v20130131/lib/jetty-http-8.1.9.v20130131.jar:/opt/educat/apps/server/jetty-distribution-8.1.9.v20130131/lib/jetty-continuation-8.1.9.v20130131.jar:/opt/educat/apps/server/jetty-distribution-8.1.9.v20130131/lib/jetty-server-8.1.9.v20130131.jar:/opt/educat/apps/server/jetty-distribution-8.1.9.v20130131/lib/jetty-security-8.1.9.v20130131.jar:/opt/educat/apps/server/jetty-distribution-8.1.9.v20130131/lib/jetty-servlet-8.1.9.v20130131.jar:/opt/educat/apps/server/jetty-distribution-8.1.9.v20130131/lib/jetty-webapp-8.1.9.v20130131.jar:/opt/educat/apps/server/jetty-distribution-8.1.9.v20130131/lib/jetty-deploy-8.1.9.v20130131.jar:/opt/educat/apps/server/jetty-distribution-8.1.9.v20130131/lib/jetty-servlets-8.1.9.v20130131.jar:/opt/educat/apps/server/jetty-distribution-8.1.9.v20130131/l" java.property.java.endorsed.dirs="/usr/local/jdk1.7.0_21/jre/lib/endorsed" java.property.java.ext.dirs="/usr/local/jdk1.7.0_21/jre/lib/ext:/usr/java/packages/lib/ext" java.property.java.home="/usr/local/jdk1.7.0_21/jre" java.property.java.library.path="/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib" java.property.java.version="1.7.0_21" java.property.java.vm.info="mixed mode" java.property.java.vm.name="Java HotSpot(TM) 64-Bit Server VM" java.property.java.vm.specification.name="Java Virtual Machine Specification" java.property.java.vm.specification.vendor="Oracle Corporation" java.property.java.vm.specification.version="1.7" java.property.java.vm.vendor="Oracle Corporation" java.property.java.vm.version="23.21-b01" java.rt.vmArgs="-javaagent:/opt/educat/apps/lib/jolokia-jvm-1.1.0-agent.jar=port=23061 -Xloggc:/var/patterncat/logs/catapp.gc.log.201505071655 -XX:ErrorFile=/var/patterncat/logs/catapp.vmerr.log.201505071655 -XX:HeapDumpPath=/var/patterncat/logs/catapp.heaperr.log.201505071655 -Xmx5g -Xms5g -XX:MaxPermSize=256m -XX:+HeapDumpOnOutOfMemoryError -XX:+DisableExplicitGC -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps -XX:+PrintGCApplicationStoppedTime -XX:+PrintHeapAtGC -XX:+PrintTenuringDistribution -XX:+PrintCommandLineFlags -XX:+PrintAdaptiveSizePolicy -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:MaxGCPauseMillis=100 -XX:StringTableSize=49999 -Djetty.home=/opt/educat/apps/server/jetty-distribution-8.1.9.v20130131 -Dapp.port=8061 -Dmedis_environment=online -Dcore.step=app -DSTOP.PORT=38061 -Djetty.port=8061 -Dcom.sun.management.jmxremote.authenticate=false -Dapp.logdir=/var/patterncat/logs -DLog4jContextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector -Dapp.ip=10.64.28.207 -Dapp.cont" java.rt.vmFlags="" java.threads.daemon=72 java.threads.live=128 java.threads.livePeak=129 java.threads.started=1444 sun.ci.compilerThread.0.compiles=2595 sun.ci.compilerThread.0.method="" sun.ci.compilerThread.0.time=1290 sun.ci.compilerThread.0.type=1 sun.ci.compilerThread.1.compiles=2802 sun.ci.compilerThread.1.method="" sun.ci.compilerThread.1.time=1413 sun.ci.compilerThread.1.type=2 sun.ci.lastFailedMethod="" sun.ci.lastFailedType=0 sun.ci.lastInvalidatedMethod="" sun.ci.lastInvalidatedType=0 sun.ci.lastMethod="org/codehaus/groovy/classgen/VariableScopeVisitor checkVariableNameForDeclaration" sun.ci.lastSize=2184 sun.ci.lastType=1 sun.ci.nmethodCodeSize=12188576 sun.ci.nmethodSize=24492688 sun.ci.osrBytes=196694 sun.ci.osrCompiles=156 sun.ci.osrTime=8521713 sun.ci.standardBytes=2072839 sun.ci.standardCompiles=5241 sun.ci.standardTime=70804692 sun.ci.threads=2 sun.ci.totalBailouts=0 sun.ci.totalCompiles=5397 sun.ci.totalInvalidates=0 sun.classloader.findClassTime=358334873 sun.classloader.findClasses=507 sun.classloader.parentDelegationTime=30062667 sun.cls.appClassBytes=63743816 sun.cls.appClassLoadCount=58098 sun.cls.appClassLoadTime=9843833 sun.cls.appClassLoadTime.self=5288490 sun.cls.classInitTime=2617049 sun.cls.classInitTime.self=1088905 sun.cls.classLinkedTime=4605704 sun.cls.classLinkedTime.self=541928 sun.cls.classVerifyTime=4055324 sun.cls.classVerifyTime.self=2423448 sun.cls.defineAppClassTime=3206202 sun.cls.defineAppClassTime.self=386302 sun.cls.defineAppClasses=16465 sun.cls.initializedClasses=14546 sun.cls.isUnsyncloadClassSet=0 sun.cls.jniDefineClassNoLockCalls=94 sun.cls.jvmDefineClassNoLockCalls=4405 sun.cls.jvmFindLoadedClassNoLockCalls=32671 sun.cls.linkedClasses=16465 sun.cls.loadInstanceClassFailRate=0 sun.cls.loadedBytes=43314456 sun.cls.lookupSysClassTime=87247 sun.cls.methodBytes=34262690 sun.cls.nonSystemLoaderLockContentionRate=133 sun.cls.parseClassTime=3099390 sun.cls.parseClassTime.self=2670584 sun.cls.sharedClassLoadTime=9647 sun.cls.sharedLoadedBytes=0 sun.cls.sharedUnloadedBytes=0 sun.cls.sysClassBytes=12986737 sun.cls.sysClassLoadTime=503885 sun.cls.systemLoaderLockContentionRate=0 sun.cls.time=15382336 sun.cls.unloadedBytes=5087120 sun.cls.unsafeDefineClassCalls=1555 sun.cls.verifiedClasses=16383 sun.gc.cause="No GC" sun.gc.collector.0.invocations=85 sun.gc.collector.0.lastEntryTime=24164511065 sun.gc.collector.0.lastExitTime=24164628388 sun.gc.collector.0.name="G1 incremental collections" sun.gc.collector.0.time=7628099 sun.gc.collector.1.invocations=1 sun.gc.collector.1.lastEntryTime=24543200515 sun.gc.collector.1.lastExitTime=24544107869 sun.gc.collector.1.name="G1 stop-the-world full collections" sun.gc.collector.1.time=907355 sun.gc.generation.0.agetable.bytes.00=0 sun.gc.generation.0.agetable.bytes.01=4294976 sun.gc.generation.0.agetable.bytes.02=2014880 sun.gc.generation.0.agetable.bytes.03=5406352 sun.gc.generation.0.agetable.bytes.04=4875176 sun.gc.generation.0.agetable.bytes.05=2865952 sun.gc.generation.0.agetable.bytes.06=4374048 sun.gc.generation.0.agetable.bytes.07=2058664 sun.gc.generation.0.agetable.bytes.08=3574376 sun.gc.generation.0.agetable.bytes.09=6923448 sun.gc.generation.0.agetable.bytes.10=1541088 sun.gc.generation.0.agetable.bytes.11=1347376 sun.gc.generation.0.agetable.bytes.12=735888 sun.gc.generation.0.agetable.bytes.13=402632 sun.gc.generation.0.agetable.bytes.14=713272 sun.gc.generation.0.agetable.bytes.15=728688 sun.gc.generation.0.agetable.size=16 sun.gc.generation.0.capacity=4510973976 sun.gc.generation.0.maxCapacity=5368709144 sun.gc.generation.0.minCapacity=24 sun.gc.generation.0.name="young" sun.gc.generation.0.space.0.capacity=4510973960 sun.gc.generation.0.space.0.initCapacity=1128267784 sun.gc.generation.0.space.0.maxCapacity=5368709128 sun.gc.generation.0.space.0.name="eden" sun.gc.generation.0.space.0.used=580911104 sun.gc.generation.0.space.1.capacity=8 sun.gc.generation.0.space.1.initCapacity=8 sun.gc.generation.0.space.1.maxCapacity=8 sun.gc.generation.0.space.1.name="s0" sun.gc.generation.0.space.1.used=0 sun.gc.generation.0.space.2.capacity=8 sun.gc.generation.0.space.2.initCapacity=8 sun.gc.generation.0.space.2.maxCapacity=5368709128 sun.gc.generation.0.space.2.name="s1" sun.gc.generation.0.space.2.used=0 sun.gc.generation.0.spaces=3 sun.gc.generation.1.capacity=857735176 sun.gc.generation.1.maxCapacity=5368709128 sun.gc.generation.1.minCapacity=8 sun.gc.generation.1.name="old" sun.gc.generation.1.space.0.capacity=857735176 sun.gc.generation.1.space.0.initCapacity=4240441352 sun.gc.generation.1.space.0.maxCapacity=5368709128 sun.gc.generation.1.space.0.name="space" sun.gc.generation.1.space.0.used=155730608 sun.gc.generation.1.spaces=1 sun.gc.generation.2.capacity=138412032 sun.gc.generation.2.maxCapacity=268435456 sun.gc.generation.2.minCapacity=20971520 sun.gc.generation.2.name="perm" sun.gc.generation.2.space.0.capacity=138412032 sun.gc.generation.2.space.0.initCapacity=20971520 sun.gc.generation.2.space.0.maxCapacity=268435456 sun.gc.generation.2.space.0.name="perm" sun.gc.generation.2.space.0.used=138212560 sun.gc.generation.2.spaces=1 sun.gc.lastCause="Heap Inspection Initiated GC" sun.gc.policy.collectors=1 sun.gc.policy.desiredSurvivorSize=264241152 sun.gc.policy.generations=3 sun.gc.policy.maxTenuringThreshold=15 sun.gc.policy.name="GarbageFirst" sun.gc.policy.tenuringThreshold=15 sun.gc.tlab.alloc=0 sun.gc.tlab.allocThreads=0 sun.gc.tlab.fastWaste=0 sun.gc.tlab.fills=0 sun.gc.tlab.gcWaste=0 sun.gc.tlab.maxFastWaste=0 sun.gc.tlab.maxFills=0 sun.gc.tlab.maxGcWaste=0 sun.gc.tlab.maxSlowAlloc=0 sun.gc.tlab.maxSlowWaste=0 sun.gc.tlab.slowAlloc=0 sun.gc.tlab.slowWaste=0 sun.management.JMXConnectorServer.0.authenticate="false" sun.management.JMXConnectorServer.0.remoteAddress="service:jmx:rmi:///jndi/rmi://edu-cat02.lf.patterncat.com:8199/jmxrmi" sun.management.JMXConnectorServer.0.ssl="false" sun.management.JMXConnectorServer.0.sslNeedClientAuth="false" sun.management.JMXConnectorServer.0.sslRegistry="false" sun.management.JMXConnectorServer.address="service:jmx:rmi://127.0.0.1/stub/rO0ABXNyAC5qYXZheC5tYW5hZ2VtZW50LnJlbW90ZS5ybWkuUk1JU2VydmVySW1wbF9TdHViAAAAAAAAAAICAAB4cgAaamF2YS5ybWkuc2VydmVyLlJlbW90ZVN0dWLp/tzJi+FlGgIAAHhyABxqYXZhLnJtaS5zZXJ2ZXIuUmVtb3RlT2JqZWN002G0kQxhMx4DAAB4cHc3AAtVbmljYXN0UmVmMgAADDEwLjY0LjI4LjIwNwAAhbjWmVwaDwiNg3l3YeUAAAFNLZX68oACAHg=" sun.os.hrt.frequency=1000000 sun.os.hrt.ticks=24580753795 sun.perfdata.majorVersion=2 sun.perfdata.minorVersion=0 sun.perfdata.overflow=0 sun.perfdata.size=32768 sun.perfdata.timestamp=259316 sun.perfdata.used=17792 sun.property.sun.boot.class.path="/usr/local/jdk1.7.0_21/jre/lib/resources.jar:/usr/local/jdk1.7.0_21/jre/lib/rt.jar:/usr/local/jdk1.7.0_21/jre/lib/sunrsasign.jar:/usr/local/jdk1.7.0_21/jre/lib/jsse.jar:/usr/local/jdk1.7.0_21/jre/lib/jce.jar:/usr/local/jdk1.7.0_21/jre/lib/charsets.jar:/usr/local/jdk1.7.0_21/jre/lib/jfr.jar:/usr/local/jdk1.7.0_21/jre/classes" sun.property.sun.boot.library.path="/usr/local/jdk1.7.0_21/jre/lib/amd64" sun.rt._sync_ContendedLockAttempts=297851 sun.rt._sync_Deflations=438863 sun.rt._sync_EmptyNotifications=0 sun.rt._sync_FailedSpins=0 sun.rt._sync_FutileWakeups=349651 sun.rt._sync_Inflations=438971 sun.rt._sync_MonExtant=16256 sun.rt._sync_MonInCirculation=0 sun.rt._sync_MonScavenged=0 sun.rt._sync_Notifications=1580811 sun.rt._sync_Parks=1935145 sun.rt._sync_PrivateA=0 sun.rt._sync_PrivateB=0 sun.rt._sync_SlowEnter=0 sun.rt._sync_SlowExit=0 sun.rt._sync_SlowNotify=0 sun.rt._sync_SlowNotifyAll=0 sun.rt._sync_SuccessfulSpins=0 sun.rt.applicationTime=24559855809 sun.rt.createVmBeginTime=1430988913170 sun.rt.createVmEndTime=1430988913429 sun.rt.internalVersion="Java HotSpot(TM) 64-Bit Server VM (23.21-b01) for linux-amd64 JRE (1.7.0_21-b11), built on Apr  4 2013 04:03:29 by "java_re" with gcc 4.3.0 20080428 (Red Hat 4.3.0-8)" sun.rt.interruptedBeforeIO=0 sun.rt.interruptedDuringIO=0 sun.rt.javaCommand="org.eclipse.jetty.xml.XmlConfiguration /tmp/start4070493346048555702.properties /opt/educat/apps/conf/jetty8.xml" sun.rt.jvmCapabilities="1000000000000000000000000000000000000000000000000000000000000000" sun.rt.jvmVersion=387252225 sun.rt.safepointSyncTime=2333795 sun.rt.safepointTime=15955181 sun.rt.safepoints=18365 sun.rt.threadInterruptSignaled=0 sun.rt.vmInitDoneTime=1430988913232 sun.threads.vmOperationTime=9516621 sun.urlClassLoader.readClassBytesTime=958824201 sun.zip.zipFile.openTime=72163038 sun.zip.zipFiles=3838