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lankk：
lankk 写道事实上，在运行String s1=new St ...
理解String 及 String.intern() 在实际中的应用 -
lankk：
事实上，在运行String s1=new String(&qu ...
理解String 及 String.intern() 在实际中的应用 -
lankk：
同意1楼的说法http://docs.oracle.com/j ...
理解String 及 String.intern() 在实际中的应用 -
raoyutao：
...
jdk 线程池 ThreadPoolExecutor -
hongdanning：
理解了。之前困惑的一些明白了。谢谢分享。
理解String 及 String.intern() 在实际中的应用
今天研究了下这个JDK的线程池实现，当有任务来的时候，他首先用corePoolSize的线程执行，用完了就把任务放
在队列里面排队，假如又排满了，这时才会启用新的超出corePoolSize大小的线程来执行，假如还是用完了
maximumPoolSize，这个时候就会采用RejectedExecutionHandler来执行相应的策略，
ThreadPoolExecutor.CallerRunsPolicy()这个策略是用ThreadPoolExecutor的执行线程或者说主线
程来执行任务（而不是线程池中的线程），任务多的话就相当于主线程阻塞了，src如下：
/**
* Executes task r in the caller's thread, unless the executor
* has been shut down, in which case the task is discarded.
* @param r the runnable task requested to be executed
* @param e the executor attempting to execute this task
*/
public void rejectedExecution(Runnable r, ThreadPoolExecutor e) {
if (!e.isShutdown()) {
r.run();
}
}
=======================
线程池类为
java.util.concurrent.ThreadPoolExecutor，常用构造方法为：
ThreadPoolExecutor(int
corePoolSize, int maximumPoolSize,
long keepAliveTime, TimeUnit
unit,
BlockingQueue<Runnable> workQueue,
RejectedExecutionHandler
handler)
corePoolSize：
线程池维护线程的最少数量
maximumPoolSize：线程池维护线程的最大数量
keepAliveTime：
线程池维护线程所允许的空闲时间
unit： 线程池维护线程所允许的空闲时间的单位
workQueue： 线程池所使用的缓冲队列
handler：
线程池对拒绝任务的处理策略
一个任务通过 execute(Runnable)方法被添加到线程池，任务就是一个
Runnable类型的对象，任务的执行方法就是 Runnable类型对象的run()方法。
当一个任务通过
execute(Runnable)方法欲添加到线程池时：
如果此时线程池中的数量小于corePoolSize，即使线程池中的线程都
处于空闲状态，也要创建新的线程来处理被添加的任务。
如果此时线程池中的数 量等于 corePoolSize，但是缓冲队列 workQueue未满，那么任务被放入缓冲队列。
如果此时线程池中的数 量大于corePoolSize，缓冲队列workQueue满，并且线程池中的数量小于maximumPoolSize，建新的线程来处理被添加的任 务。
如果此时线程池中的数
量大于corePoolSize，缓冲队列workQueue满，并且线程池中的数量等于maximumPoolSize，那么通过
handler所指定的策略来处理此任务。
也就是：处理任务的优先级为：
核心线程corePoolSize、任务队列
workQueue、最大线程maximumPoolSize，如果三者都满了，使用handler处理被拒绝的任务。
当线程池中的线程
数量大于 corePoolSize时，如果某线程空闲时间超过keepAliveTime，线程将被终止。这样，线程池可以动态的调整池中的线程数。
unit
可选的参数为java.util.concurrent.TimeUnit中的几个静态属性：
NANOSECONDS、
MICROSECONDS、MILLISECONDS、SECONDS。
workQueue我常用的
是：java.util.concurrent.ArrayBlockingQueue
handler有四个选择：
ThreadPoolExecutor.AbortPolicy()
抛
出java.util.concurrent.RejectedExecutionException异常
ThreadPoolExecutor.CallerRunsPolicy()
重
试添加当前的任务，他会自动重复调用execute()方法
ThreadPoolExecutor.DiscardOldestPolicy()
抛
弃旧的任务
ThreadPoolExecutor.DiscardPolicy()
抛弃当前的任务
=======================
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.RejectedExecutionHandler;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
public class TimingThreadPool extends ThreadPoolExecutor {
public TimingThreadPool(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit,
BlockingQueue<Runnable> workQueue, RejectedExecutionHandler handler) {
super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, handler);
}
private final ThreadLocal<Long> startTime = new ThreadLocal<Long>();
private final AtomicLong numTasks = new AtomicLong();
private final AtomicLong totalTime = new AtomicLong();
protected void beforeExecute(Thread t, Runnable r) {
super.beforeExecute(t, r);
System.out.println(String.format("Thread %s: start %s", t, r));
startTime.set(System.nanoTime());
}
protected void afterExecute(Runnable r, Throwable t) {
try {
long endTime = System.nanoTime();
long taskTime = endTime - startTime.get();
numTasks.incrementAndGet();
totalTime.addAndGet(taskTime);
System.out.println(String.format("Thread %s: end %s, time=%dns", t, r, taskTime));
} finally {
super.afterExecute(r, t);
}
}
protected void terminated() {
try {
System.out.println(String.format("Terminated: avg time=%dns", totalTime.get() / numTasks.get()));
} finally {
super.terminated();
}
}
private static class Task implements Runnable{
private String task;
public Task(String task){
this.task=task;
}
@Override
public void run() {
System.out.println(task);
if(task.equals("51")){
throw new RuntimeException();
}
}
}
public static void main(String[] args) throws Exception {
TimingThreadPool pool = new TimingThreadPool(2, 4, 4, TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(3),
new ThreadPoolExecutor.CallerRunsPolicy());
for (int i = 0; i < 100; i++) {
try {
// 产生一个任务，并将其加入到线程池
String task = "" + i;
System.out.println("put " + task);
pool.execute(new Task(task));
// 便于观察，等待一段时间
Thread.sleep(1);
} catch (Exception e) {
e.printStackTrace();
}
}
Thread.sleep(5000);
pool.shutdown();
System.out.println(pool.getTaskCount()+" c:"+pool.getCompletedTaskCount());
}
}
输出
put 0 put 1 put 2 put 3 put 4 put 5 put 6 put 7 7 put 8 8 put 9 9 put 10 10 put 11 11 put 12 12 put 13 13 put 14 14 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1cf8583 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@901887 1 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@3a6727 5 Thread null: end TimingThreadPool$Task@1cf8583, time=213828ns Thread null: end TimingThreadPool$Task@3a6727, time=58966ns Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@4a65e0 2 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@665753 3 Thread null: end TimingThreadPool$Task@4a65e0, time=48434ns Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@ef22f8 4 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@14693c7 put 15 Thread null: end TimingThreadPool$Task@ef22f8, time=63137ns Thread null: end TimingThreadPool$Task@665753, time=47749ns Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1e0cf70 15 0 Thread null: end TimingThreadPool$Task@1e0cf70, time=55931ns 6 Thread null: end TimingThreadPool$Task@901887, time=2656284ns put 16 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@c40c80 16 Thread null: end TimingThreadPool$Task@14693c7, time=588756ns Thread null: end TimingThreadPool$Task@c40c80, time=60816ns put 17 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@110d81b 17 Thread null: end TimingThreadPool$Task@110d81b, time=55044ns put 18 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@dbe178 18 Thread null: end TimingThreadPool$Task@dbe178, time=55322ns put 19 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@1af9e22 19 Thread null: end TimingThreadPool$Task@1af9e22, time=53804ns put 20 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@b6ece5 20 Thread null: end TimingThreadPool$Task@b6ece5, time=49594ns put 21 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@17ace8d 21 Thread null: end TimingThreadPool$Task@17ace8d, time=53844ns put 22 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@18eb9e6 22 Thread null: end TimingThreadPool$Task@18eb9e6, time=53462ns put 23 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@14ed9ff 23 Thread null: end TimingThreadPool$Task@14ed9ff, time=51846ns put 24 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@1ca318a 24 Thread null: end TimingThreadPool$Task@1ca318a, time=54117ns put 25 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@17a8913 25 Thread null: end TimingThreadPool$Task@17a8913, time=51171ns put 26 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@1bd747e 26 Thread null: end TimingThreadPool$Task@1bd747e, time=52704ns put 27 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@12b3374 27 Thread null: end TimingThreadPool$Task@12b3374, time=50130ns put 28 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@13f3789 28 Thread null: end TimingThreadPool$Task@13f3789, time=51766ns put 29 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1571886 29 Thread null: end TimingThreadPool$Task@1571886, time=46267ns put 30 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@10b4199 30 put 31 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@1ffb8dc 31 Thread null: end TimingThreadPool$Task@1ffb8dc, time=345324ns Thread null: end TimingThreadPool$Task@10b4199, time=51230ns put 32 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@1c184f4 32 Thread null: end TimingThreadPool$Task@1c184f4, time=52455ns put 33 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1ffbd68 33 Thread null: end TimingThreadPool$Task@1ffbd68, time=44397ns put 34 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@ec16a4 34 Thread null: end TimingThreadPool$Task@ec16a4, time=47546ns put 35 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@1c29ab2 35 Thread null: end TimingThreadPool$Task@1c29ab2, time=185369ns put 36 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@13a328f 36 Thread null: end TimingThreadPool$Task@13a328f, time=145857ns put 37 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1cd8669 37 Thread null: end TimingThreadPool$Task@1cd8669, time=46673ns put 38 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@337838 38 Thread null: end TimingThreadPool$Task@337838, time=53263ns put 39 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@119cca4 39 Thread null: end TimingThreadPool$Task@119cca4, time=45766ns put 40 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@ca2dce 40 Thread null: end TimingThreadPool$Task@ca2dce, time=54013ns put 41 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@18558d2 41 Thread null: end TimingThreadPool$Task@18558d2, time=44441ns put 42 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@18a47e0 42 Thread null: end TimingThreadPool$Task@18a47e0, time=52530ns put 43 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@174cc1f 43 put 44 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@1050e1f 44 Thread null: end TimingThreadPool$Task@1050e1f, time=53745ns Thread null: end TimingThreadPool$Task@174cc1f, time=71815ns put 45 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@e24e2a 45 Thread null: end TimingThreadPool$Task@e24e2a, time=52243ns put 46 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@179c285 46 Thread null: end TimingThreadPool$Task@179c285, time=52579ns put 47 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@d1e604 47 Thread null: end TimingThreadPool$Task@d1e604, time=40479ns put 48 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@54172f 48 Thread null: end TimingThreadPool$Task@54172f, time=56997ns put 49 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@be2358 49 Thread null: end TimingThreadPool$Task@be2358, time=49872ns put 50 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@1027b4d 50 Thread null: end TimingThreadPool$Task@1027b4d, time=54593ns put 51 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@1ed2ae8 51 Thread java.lang.RuntimeException: end TimingThreadPool$Task@1ed2ae8, time=293389ns put 52 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@19c26f5 52 Thread null: end TimingThreadPool$Task@19c26f5, time=51384ns Exception in thread "pool-1-thread-3" java.lang.RuntimeException at TimingThreadPool$Task.run(TimingThreadPool.java:56) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) put 53 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@c1b531 53 Thread null: end TimingThreadPool$Task@c1b531, time=59174ns put 54 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@15eb0a9 54 Thread null: end TimingThreadPool$Task@15eb0a9, time=72415ns put 55 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1a05308 55 Thread null: end TimingThreadPool$Task@1a05308, time=51091ns put 56 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@ab50cd 56 Thread null: end TimingThreadPool$Task@ab50cd, time=51245ns put 57 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@145d068 57 Thread null: end TimingThreadPool$Task@145d068, time=53228ns put 58 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@758fc9 58 Thread null: end TimingThreadPool$Task@758fc9, time=55813ns put 59 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@32fb4f 59 Thread null: end TimingThreadPool$Task@32fb4f, time=64516ns put 60 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@1113708 60 Thread null: end TimingThreadPool$Task@1113708, time=53527ns put 61 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@133f1d7 61 Thread null: end TimingThreadPool$Task@133f1d7, time=47685ns put 62 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@14a9972 62 Thread null: end TimingThreadPool$Task@14a9972, time=66598ns put 63 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@a01335 63 Thread null: end TimingThreadPool$Task@a01335, time=52664ns put 64 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@14d3343 64 Thread null: end TimingThreadPool$Task@14d3343, time=52168ns put 65 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@1608e05 65 Thread null: end TimingThreadPool$Task@1608e05, time=50744ns put 66 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@f81843 66 Thread null: end TimingThreadPool$Task@f81843, time=51930ns put 67 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@dd5b 67 Thread null: end TimingThreadPool$Task@dd5b, time=47977ns put 68 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@c4bcdc 68 Thread null: end TimingThreadPool$Task@c4bcdc, time=52857ns put 69 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@4b4333 69 Thread null: end TimingThreadPool$Task@4b4333, time=50749ns put 70 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@128e20a 70 Thread null: end TimingThreadPool$Task@128e20a, time=51191ns put 71 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@1100d7a 71 Thread null: end TimingThreadPool$Task@1100d7a, time=47754ns put 72 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@e4f972 72 Thread null: end TimingThreadPool$Task@e4f972, time=51478ns put 73 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@b4d3d5 73 Thread null: end TimingThreadPool$Task@b4d3d5, time=53333ns put 74 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@1bf52a5 74 Thread null: end TimingThreadPool$Task@1bf52a5, time=54434ns put 75 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@1cafa9e 75 Thread null: end TimingThreadPool$Task@1cafa9e, time=52619ns put 76 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@10b9d04 76 Thread null: end TimingThreadPool$Task@10b9d04, time=48652ns put 77 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@171732b 77 Thread null: end TimingThreadPool$Task@171732b, time=52614ns put 78 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@1404536 78 Thread null: end TimingThreadPool$Task@1404536, time=51528ns put 79 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@7fdcde 79 Thread null: end TimingThreadPool$Task@7fdcde, time=50730ns put 80 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@7d8483 80 Thread null: end TimingThreadPool$Task@7d8483, time=52887ns put 81 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@86f241 81 Thread null: end TimingThreadPool$Task@86f241, time=51860ns put 82 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@18ac738 82 Thread null: end TimingThreadPool$Task@18ac738, time=50338ns put 83 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@1d6096 83 Thread null: end TimingThreadPool$Task@1d6096, time=56953ns put 84 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@b02e7a 84 Thread null: end TimingThreadPool$Task@b02e7a, time=52748ns put 85 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@bb6ab6 85 Thread null: end TimingThreadPool$Task@bb6ab6, time=50636ns put 86 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@5afd29 86 Thread null: end TimingThreadPool$Task@5afd29, time=43648ns put 87 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@1a2961b 87 Thread null: end TimingThreadPool$Task@1a2961b, time=48493ns put 88 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@15dfd77 88 Thread null: end TimingThreadPool$Task@15dfd77, time=46385ns put 89 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@1abc7b9 89 Thread null: end TimingThreadPool$Task@1abc7b9, time=45330ns put 90 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@c55e36 90 Thread null: end TimingThreadPool$Task@c55e36, time=50130ns put 91 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1ac3c08 91 Thread null: end TimingThreadPool$Task@1ac3c08, time=57653ns put 92 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@9971ad 92 Thread null: end TimingThreadPool$Task@9971ad, time=117342ns put 93 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@1f630dc 93 Thread null: end TimingThreadPool$Task@1f630dc, time=50665ns put 94 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1c5c1 94 Thread null: end TimingThreadPool$Task@1c5c1, time=49212ns put 95 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@5e0602 95 Thread null: end TimingThreadPool$Task@5e0602, time=52297ns put 96 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@dc840f 96 Thread null: end TimingThreadPool$Task@dc840f, time=53417ns put 97 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1621e42 97 Thread null: end TimingThreadPool$Task@1621e42, time=48067ns put 98 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@b09e89 98 Thread null: end TimingThreadPool$Task@b09e89, time=47244ns put 99 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@1787038 99 Thread null: end TimingThreadPool$Task@1787038, time=47105ns Terminated: avg time=97174ns 91 c:91
这里要注意的是当其中一个线程（
thread-3
）抛出异常后，他就再没执行过任务，但他还是占着一个线程计数，所以在代码中，可能要try catch，不然随着时间流逝，可用线程会越来越少。
然后我修改了代码
@Override
public void run() {
System.out.println(task);
if(task.equals("51")){
throw new RuntimeException();
}
if(task.equals("61")){
throw new RuntimeException();
}
if(task.equals("71")){
throw new RuntimeException();
}
if(task.equals("81")){
throw new RuntimeException();
}
}
结果在线程不断减少，到了少于2个（corePoolSize）的时候，就会起新的线程，满足至少2个
假如修改corePoolSize 为1甚至为0的时候，在线程不断减少的情况，他只会保持一个线程
public void run() {
System.out.println(task);
if(task.equals("51")){
throw new RuntimeException();
}
if(task.equals("61")){
throw new RuntimeException();
}
if(task.equals("71")){
throw new RuntimeException();
}
if(task.equals("81")){
throw new RuntimeException();
}
if(task.equals("87")){
throw new RuntimeException();
}
}
}
public static void main(String[] args) throws Exception {
TimingThreadPool pool = new TimingThreadPool(0, 4, 4, TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(3),
new ThreadPoolExecutor.CallerRunsPolicy());
put 0 put 1 put 2 put 3 put 4 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1bf73fa Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@1bf73fa 0 4 Thread null: end TimingThreadPool$Task@1bf73fa, time=132334ns Thread null: end TimingThreadPool$Task@1bf73fa, time=730770ns Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@5740bb 1 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@5ac072 Thread null: end TimingThreadPool$Task@5740bb, time=50705ns 2 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@109a4c 3 Thread null: end TimingThreadPool$Task@109a4c, time=211730ns Thread null: end TimingThreadPool$Task@5ac072, time=491021ns put 5 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@1cf8583 5 Thread null: end TimingThreadPool$Task@1cf8583, time=57613ns put 6 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@14693c7 6 Thread null: end TimingThreadPool$Task@14693c7, time=54950ns put 7 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@901887 7 Thread null: end TimingThreadPool$Task@901887, time=59388ns put 8 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@3a6727 8 Thread null: end TimingThreadPool$Task@3a6727, time=55069ns put 9 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@4a65e0 9 Thread null: end TimingThreadPool$Task@4a65e0, time=58049ns put 10 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@665753 10 Thread null: end TimingThreadPool$Task@665753, time=59184ns put 11 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@ef22f8 11 Thread null: end TimingThreadPool$Task@ef22f8, time=57593ns put 12 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1e0cf70 12 Thread null: end TimingThreadPool$Task@1e0cf70, time=50125ns put 13 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@52fe85 13 Thread null: end TimingThreadPool$Task@52fe85, time=54101ns put 14 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@c40c80 14 Thread null: end TimingThreadPool$Task@c40c80, time=54107ns put 15 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@110d81b 15 Thread null: end TimingThreadPool$Task@110d81b, time=57637ns put 16 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@dbe178 16 Thread null: end TimingThreadPool$Task@dbe178, time=53467ns put 17 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@1af9e22 17 Thread null: end TimingThreadPool$Task@1af9e22, time=54116ns put 18 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@b6ece5 18 Thread null: end TimingThreadPool$Task@b6ece5, time=52585ns put 19 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@17ace8d 19 Thread null: end TimingThreadPool$Task@17ace8d, time=52544ns put 20 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@18eb9e6 20 Thread null: end TimingThreadPool$Task@18eb9e6, time=56631ns put 21 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@14ed9ff 21 Thread null: end TimingThreadPool$Task@14ed9ff, time=55094ns put 22 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1ca318a 22 Thread null: end TimingThreadPool$Task@1ca318a, time=55615ns put 23 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@17a8913 23 Thread null: end TimingThreadPool$Task@17a8913, time=59363ns put 24 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1bd747e 24 Thread null: end TimingThreadPool$Task@1bd747e, time=62046ns put 25 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@12b3374 25 Thread null: end TimingThreadPool$Task@12b3374, time=61620ns put 26 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@13f3789 26 Thread null: end TimingThreadPool$Task@13f3789, time=55465ns put 27 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@1571886 27 Thread null: end TimingThreadPool$Task@1571886, time=55108ns put 28 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@10b4199 28 Thread null: end TimingThreadPool$Task@10b4199, time=53859ns put 29 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@1ffb8dc 29 Thread null: end TimingThreadPool$Task@1ffb8dc, time=57691ns put 30 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1c184f4 30 Thread null: end TimingThreadPool$Task@1c184f4, time=52297ns put 31 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@1ffbd68 31 Thread null: end TimingThreadPool$Task@1ffbd68, time=53968ns put 32 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@ec16a4 32 Thread null: end TimingThreadPool$Task@ec16a4, time=51335ns put 33 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@1c29ab2 33 Thread null: end TimingThreadPool$Task@1c29ab2, time=65482ns put 34 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@13a328f 34 Thread null: end TimingThreadPool$Task@13a328f, time=53120ns put 35 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@1cd8669 35 Thread null: end TimingThreadPool$Task@1cd8669, time=56392ns put 36 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@337838 36 Thread null: end TimingThreadPool$Task@337838, time=49371ns put 37 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@119cca4 37 Thread null: end TimingThreadPool$Task@119cca4, time=54087ns put 38 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@ca2dce 38 Thread null: end TimingThreadPool$Task@ca2dce, time=52589ns put 39 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@18558d2 39 Thread null: end TimingThreadPool$Task@18558d2, time=55466ns put 40 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@18a47e0 40 Thread null: end TimingThreadPool$Task@18a47e0, time=54518ns put 41 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@174cc1f 41 Thread null: end TimingThreadPool$Task@174cc1f, time=54305ns put 42 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1050e1f 42 Thread null: end TimingThreadPool$Task@1050e1f, time=60261ns put 43 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@e24e2a 43 Thread null: end TimingThreadPool$Task@e24e2a, time=56988ns put 44 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@179c285 44 Thread null: end TimingThreadPool$Task@179c285, time=52381ns put 45 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@d1e604 45 Thread null: end TimingThreadPool$Task@d1e604, time=53725ns put 46 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@54172f 46 Thread null: end TimingThreadPool$Task@54172f, time=62929ns put 47 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@be2358 47 Thread null: end TimingThreadPool$Task@be2358, time=58525ns put 48 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1027b4d 48 Thread null: end TimingThreadPool$Task@1027b4d, time=55664ns put 49 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@1ed2ae8 49 Thread null: end TimingThreadPool$Task@1ed2ae8, time=53338ns put 50 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@19c26f5 50 Thread null: end TimingThreadPool$Task@19c26f5, time=54191ns put 51 Thread Thread[pool-1-thread-1,5,main]: start TimingThreadPool$Task@c1b531 51 Thread java.lang.RuntimeException: end TimingThreadPool$Task@c1b531, time=95662ns Exception in thread "pool-1-thread-1" java.lang.RuntimeException at TimingThreadPool$Task.run(TimingThreadPool.java:56) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) put 52 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@15eb0a9 52 Thread null: end TimingThreadPool$Task@15eb0a9, time=52371ns put 53 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1a05308 53 Thread null: end TimingThreadPool$Task@1a05308, time=51612ns put 54 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@ab50cd 54 Thread null: end TimingThreadPool$Task@ab50cd, time=51339ns put 55 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@145d068 55 Thread null: end TimingThreadPool$Task@145d068, time=51519ns put 56 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@758fc9 56 Thread null: end TimingThreadPool$Task@758fc9, time=52549ns put 57 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@32fb4f 57 Thread null: end TimingThreadPool$Task@32fb4f, time=53819ns put 58 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@14a9972 58 Thread null: end TimingThreadPool$Task@14a9972, time=59904ns put 59 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@a01335 59 Thread null: end TimingThreadPool$Task@a01335, time=52322ns put 60 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@14d3343 60 Thread null: end TimingThreadPool$Task@14d3343, time=50169ns put 61 Thread Thread[pool-1-thread-2,5,main]: start TimingThreadPool$Task@1608e05 61 Thread java.lang.RuntimeException: end TimingThreadPool$Task@1608e05, time=68443ns Exception in thread "pool-1-thread-2" java.lang.RuntimeException at TimingThreadPool$Task.run(TimingThreadPool.java:59) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) put 62 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@f81843 62 Thread null: end TimingThreadPool$Task@f81843, time=55005ns put 63 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@dd5b 63 Thread null: end TimingThreadPool$Task@dd5b, time=51117ns put 64 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@c4bcdc 64 Thread null: end TimingThreadPool$Task@c4bcdc, time=52391ns put 65 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@4b4333 65 Thread null: end TimingThreadPool$Task@4b4333, time=50759ns put 66 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@128e20a 66 Thread null: end TimingThreadPool$Task@128e20a, time=50720ns put 67 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@1100d7a 67 Thread null: end TimingThreadPool$Task@1100d7a, time=47714ns put 68 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@e4f972 68 Thread null: end TimingThreadPool$Task@e4f972, time=53100ns put 69 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@b4d3d5 69 Thread null: end TimingThreadPool$Task@b4d3d5, time=48885ns put 70 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@1bf52a5 70 Thread null: end TimingThreadPool$Task@1bf52a5, time=51513ns put 71 Thread Thread[pool-1-thread-3,5,main]: start TimingThreadPool$Task@1cafa9e 71 Thread java.lang.RuntimeException: end TimingThreadPool$Task@1cafa9e, time=72410ns Exception in thread "pool-1-thread-3" java.lang.RuntimeException at TimingThreadPool$Task.run(TimingThreadPool.java:62) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) put 72 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@1404536 72 Thread null: end TimingThreadPool$Task@1404536, time=59636ns put 73 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@7fdcde 73 Thread null: end TimingThreadPool$Task@7fdcde, time=50759ns put 74 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@7d8483 74 Thread null: end TimingThreadPool$Task@7d8483, time=48815ns put 75 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@86f241 75 Thread null: end TimingThreadPool$Task@86f241, time=55381ns put 76 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@18ac738 76 Thread null: end TimingThreadPool$Task@18ac738, time=49445ns put 77 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@bb6ab6 77 put 78 Thread null: end TimingThreadPool$Task@bb6ab6, time=55946ns Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@5afd29 78 Thread null: end TimingThreadPool$Task@5afd29, time=50070ns put 79 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@1a2961b 79 Thread null: end TimingThreadPool$Task@1a2961b, time=50244ns put 80 Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@12d03f9 80 Thread null: end TimingThreadPool$Task@12d03f9, time=44858ns put 81 Exception in thread "pool-1-thread-4" java.lang.RuntimeException at TimingThreadPool$Task.run(TimingThreadPool.java:65) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Thread Thread[pool-1-thread-4,5,main]: start TimingThreadPool$Task@5ffb18 81 Thread java.lang.RuntimeException: end TimingThreadPool$Task@5ffb18, time=70079ns put 82 Thread Thread[pool-1-thread-5,5,main]: start TimingThreadPool$Task@c55e36 82 Thread null: end TimingThreadPool$Task@c55e36, time=199705ns put 83 Thread Thread[pool-1-thread-5,5,main]: start TimingThreadPool$Task@1ac3c08 83 Thread null: end TimingThreadPool$Task@1ac3c08, time=52109ns put 84 Thread Thread[pool-1-thread-5,5,main]: start TimingThreadPool$Task@9971ad 84 Thread null: end TimingThreadPool$Task@9971ad, time=49356ns put 85 Thread Thread[pool-1-thread-5,5,main]: start TimingThreadPool$Task@1f630dc 85 Thread null: end TimingThreadPool$Task@1f630dc, time=48771ns put 86 Thread Thread[pool-1-thread-5,5,main]: start TimingThreadPool$Task@1c5c1 86 Thread null: end TimingThreadPool$Task@1c5c1, time=45776ns put 87 Thread Thread[pool-1-thread-5,5,main]: start TimingThreadPool$Task@5e0602 87 Thread java.lang.RuntimeException: end TimingThreadPool$Task@5e0602, time=81624ns Exception in thread "pool-1-thread-5" java.lang.RuntimeException at TimingThreadPool$Task.run(TimingThreadPool.java:68) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) put 88 Thread Thread[pool-1-thread-6,5,main]: start TimingThreadPool$Task@b09e89 88 Thread null: end TimingThreadPool$Task@b09e89, time=52227ns put 89 Thread Thread[pool-1-thread-6,5,main]: start TimingThreadPool$Task@1787038 89 Thread null: end TimingThreadPool$Task@1787038, time=54186ns put 90 Thread Thread[pool-1-thread-6,5,main]: start TimingThreadPool$Task@fa9cf 90 Thread null: end TimingThreadPool$Task@fa9cf, time=43271ns put 91 Thread Thread[pool-1-thread-6,5,main]: start TimingThreadPool$Task@55571e 91 Thread null: end TimingThreadPool$Task@55571e, time=54137ns put 92 Thread Thread[pool-1-thread-6,5,main]: start TimingThreadPool$Task@ca8327 92 Thread null: end TimingThreadPool$Task@ca8327, time=44869ns put 93 Thread Thread[pool-1-thread-6,5,main]: start TimingThreadPool$Task@16897b2 93 Thread null: end TimingThreadPool$Task@16897b2, time=43539ns put 94 Thread Thread[pool-1-thread-6,5,main]: start TimingThreadPool$Task@1bf6770 94 Thread null: end TimingThreadPool$Task@1bf6770, time=44808ns put 95 Thread Thread[pool-1-thread-6,5,main]: start TimingThreadPool$Task@1201a25 95 Thread null: end TimingThreadPool$Task@1201a25, time=44704ns put 96 Thread Thread[pool-1-thread-6,5,main]: start TimingThreadPool$Task@94948a 96 Thread null: end TimingThreadPool$Task@94948a, time=44735ns put 97 Thread Thread[pool-1-thread-6,5,main]: start TimingThreadPool$Task@a401c2 97 Thread null: end TimingThreadPool$Task@a401c2, time=47551ns put 98 Thread Thread[pool-1-thread-6,5,main]: start TimingThreadPool$Task@16f8cd0 98 Thread null: end TimingThreadPool$Task@16f8cd0, time=47864ns put 99 Thread Thread[pool-1-thread-6,5,main]: start TimingThreadPool$Task@85af80 99 Thread null: end TimingThreadPool$Task@85af80, time=46212ns Terminated: avg time=69345ns 95 c:95 =
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LockSupport 源码阅读
2015-08-11 15:31 1768在java中，要让线程等 ... -
netty 源码阅读 及 future promise学习
2015-05-15 14:36 7693netty文档说明netty的网络操作都是async ... -
（转）date format
2013-12-04 13:40 1208深入理解Java：SimpleDateFormat安全 ... -
CountDownLatch
2010-01-28 10:17 1881public class Driver2 { // ... ... -
Timer
2009-12-22 13:40 2785这两个类使用起来非常 ... -
Producer consumer
2009-12-21 14:41 1170package Thread; public class ... -
Thread 代码 wait sleep 区别
2009-12-21 10:17 1509public class ThreadTest { ...
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1、文件内容：kernel-debug-devel-3.10.0-1160.119.1.el7.rpm以及相关依赖 2、文件形式：tar.gz压缩包 3、安装指令： #Step1、解压 tar -zxvf /mnt/data/output/kernel-debug-devel-3.10.0-1160.119.1.el7.tar.gz #Step2、进入解压后的目录，执行安装 sudo rpm -ivh *.rpm 4、更多资源/技术支持：公众号禅静编程坊
该文档提供了一个关于供应链管理系统开发的详细指南，重点介绍了项目安排、技术实现和框架搭建的相关内容。 文档分为以下几个关键部分： 项目安排：主要步骤包括搭建框架（1天），基础数据模块和权限管理（4天），以及应收应付和销售管理（5天）。 供应链概念：供应链系统的核心流程是通过采购商品放入仓库，并在销售时从仓库提取商品，涉及三个主要订单：采购订单、销售订单和调拨订单。 大数据的应用：介绍了数据挖掘、ETL（数据抽取）和BI（商业智能）在供应链管理中的应用。 技术实现：讲述了DAO（数据访问对象）的重用、服务层的重用、以及前端JS的继承机制、jQuery插件开发等技术细节。 系统框架搭建：包括Maven环境的配置、Web工程的创建、持久化类和映射文件的编写，以及Spring配置文件的实现。 DAO的需求和功能：供应链管理系统的各个模块都涉及分页查询、条件查询、删除、增加、修改操作等需求。 泛型的应用：通过示例说明了在Java语言中如何使用泛型来实现模块化和可扩展性。 文档非常技术导向，适合开发人员参考，用于构建供应链管理系统的架构和功能模块。
1.版本：matlab2014/2019a/2024a 2.附赠案例数据可直接运行matlab程序。 3.代码特点：参数化编程、参数可方便更改、代码编程思路清晰、注释明细。 4.适用对象：计算机，电子信息工程、数学等专业的大学生课程设计、期末大作业和毕业设计。
C#与VB实现欧姆龙PLC的Fins TCP通信案例源码：调用动态链接库进行数据读写，定时器与计数器数据区的简洁读写操作示例,C#与VB实现欧姆龙PLC的Fins TCP通信案例源码：调用动态链接库进行读写操作，涵盖定时器计数器数据区学习案例,C#欧姆龙plc Fins Tcp通信案例上位机源码，有c#和VB的Demo，c#上位机和欧姆龙plc通讯案例源码,调用动态链接库，可以实现上位机的数据连接，可以简单实现D区W区定时器计数器等数据区的读写，是一个非常好的学习案例 ,C#; 欧姆龙PLC; Fins Tcp通信; 上位机源码; 动态链接库; 数据连接; D区W区读写; 定时器计数器; 学习案例,C#实现欧姆龙PLC Fins Tcp通信上位机源码，读写数据区高效学习案例
可调谐石墨烯超材料吸收体的FDTD仿真模拟研究报告：吸收光谱的化学势调节策略与仿真源文件解析,可调谐石墨烯超材料吸收体：化学势调节光谱的FDTD仿真模拟研究,可调谐石墨烯超材料吸收体FDTD仿真模拟 【案例内容】该案例提供了一种可调谐石墨烯超材料吸收体，其吸收光谱可以通过改变施加于石墨烯的化学势来进行调节。 【案例文件】仿真源文件 ,可调谐石墨烯超材料吸收体; FDTD仿真模拟; 化学势调节; 仿真源文件,石墨烯超材料吸收体：FDTD仿真调节吸收光谱案例解析
RBF神经网络控制仿真-第二版
松下PLC与威纶通触摸屏转盘设备控制：FPWINPRO7与EBPRO智能编程与宏指令应用,松下PLC与威纶通触摸屏转盘设备控制解决方案：FPWINPRO7与EBPRO协同工作，实现多工位转盘加工与IEC编程模式控制,松下PLC+威纶通触摸屏的转盘设备 松下PLC工程使用程序版本为FPWINPRO7 7.6.0.0版本 威纶通HMI工程使用程序版本为EBPRO 6.07.02.410S 1.多工位转盘加工控制。 2.国际标准IEC编程模式。 3.触摸屏宏指令应用控制。 ,松下PLC; 威纶通触摸屏; 转盘设备控制; 多工位加工控制; IEC编程模式; 触摸屏宏指令应用,松下PLC与威纶通HMI联控的转盘设备控制程序解析
基于循环神经网络（RNN）的多输入单输出预测模型（适用于时间序列预测与回归分析，需Matlab 2021及以上版本）,基于循环神经网络（RNN）的多输入单输出预测模型（matlab版本2021+），真实值与预测值对比，多种评价指标与线性拟合展示。,RNN预测模型做多输入单输出预测模型，直接替数据就可以用。 程序语言是matlab，需求最低版本为2021及以上。 程序可以出真实值和预测值对比图，线性拟合图，可打印多种评价指标。 PS:以下效果图为测试数据的效果图，主要目的是为了显示程序运行可以出的结果图，具体预测效果以个人的具体数据为准。 2.由于每个人的数据都是独一无二的，因此无法做到可以任何人的数据直接替就可以得到自己满意的效果。 这段程序主要是一个基于循环神经网络（RNN）的预测模型。它的应用领域可以是时间序列预测、回归分析等。下面我将对程序的运行过程进行详细解释和分析。 首先，程序开始时清空环境变量、关闭图窗、清空变量和命令行。然后，通过xlsread函数导入数据，其中'数据的输入'和'数据的输出'是两个Excel文件的文件名。 接下来，程序对数据进行归一化处理。首先使用ma
1.版本：matlab2014/2019a/2024a 2.附赠案例数据可直接运行matlab程序。 3.代码特点：参数化编程、参数可方便更改、代码编程思路清晰、注释明细。 4.适用对象：计算机，电子信息工程、数学等专业的大学生课程设计、期末大作业和毕业设计。
旅游管理系统中的功能模块主要是实现管理员；首页、个人中心、用户管理、旅游方案管理、旅游购买管理、系统管理，用户；首页、个人中心、旅游方案管理、旅游购买管理、我的收藏管理。前台首页；首页、旅游方案、旅游资讯、个人中心、后台管理等功能。经过认真细致的研究，精心准备和规划，最后测试成功，系统可以正常使用。分析功能调整与旅游管理系统实现的实际需求相结合，讨论了Java开发旅游管理系统的使用。 从上面的描述中可以基本可以实现软件的功能： 1、开发实现旅游管理系统的整个系统程序； 2、管理员；首页、个人中心、用户管理、旅游方案管理、旅游购买管理、系统管理等。 3、用户：首页、个人中心、旅游方案管理、旅游购买管理、我的收藏管理。 4、前台首页：首页、旅游方案、旅游资讯、个人中心、后台管理等相应操作； 5、基础数据管理：实现系统基本信息的添加、修改及删除等操作，并且根据需求进行交流查看及回复相应操作。
Boost二级升压光伏并网结构的Simulink建模与MPPT最大功率点追踪：基于功率反馈的扰动观察法调整电压方向研究,Boost二级升压光伏并网结构的Simulink建模与MPPT最大功率点追踪：基于功率反馈的扰动观察法调整电压方向研究,Boost二级升压光伏并网结构，Simulink建模，MPPT最大功率点追踪，扰动观察法采用功率反馈方式，若ΔP>0，说明电压调整的方向正确，可以继续按原方向进行“干扰”；若ΔP<0，说明电压调整的方向错误，需要对“干扰”的方向进行改变。 ,Boost升压;光伏并网结构;Simulink建模;MPPT最大功率点追踪;扰动观察法;功率反馈;电压调整方向。,光伏并网结构中Boost升压MPPT控制策略的Simulink建模与功率反馈扰动观察法
运行GUI版本，可二开
Deepseek相关主题资源及行业影响
WP Smush Pro 是一款专为 WordPress 网站设计的图像优化插件。 一、主要作用 图像压缩 它能够在不影响图像质量的前提下，大幅度减小图像文件的大小。例如，对于一些高分辨率的产品图片或者风景照片，它可以通过先进的压缩算法，去除图像中多余的数据。通常 JPEG 格式的图像经过压缩后，文件大小可以减少 40% – 70% 左右。这对于网站性能优化非常关键，因为较小的图像文件可以加快网站的加载速度。 该插件支持多种图像格式的压缩，包括 JPEG、PNG 和 GIF。对于 PNG 图像，它可以在保留透明度等关键特性的同时，有效地减小文件尺寸。对于 GIF 图像，也能在一定程度上优化文件大小，减少动画 GIF 的加载时间。 懒加载 WP Smush Pro 实现了图像懒加载功能。懒加载是一种延迟加载图像的技术，当用户滚动页面到包含图像的位置时，图像才会加载。这样可以避免一次性加载大量图像，尤其是在页面内容较多且包含许多图像的情况下。例如，在一个新闻网站的长文章页面，带有大量配图，懒加载可以让用户在浏览文章开头部分时，不需要等待所有图片加载，从而提高页面的初始加载速度，同时也能
Could not create share link. Missing file: C:\Users\xx\.conda\envs\omni\Lib\site-packages\gradio\frpc_windows_amd64_v0.3 1. Download this file: https://cdn-media.huggingface.co/frpc-gradio-0.3/frpc_windows_amd64.exe 2. Rename the downloaded file to: frpc_windows_amd64_v0.3 3. Move the file to this location: C:\Users\xx\.conda\envs\omni\Lib\site-packages\gradio