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转载 ReentrantLock 锁与唤醒锁

public class UseManyCondition { private ReentrantLock lock = new ReentrantLock(); private Condition c1 = lock.newCondition(); private Condition c2 = lock.newCondition(); pu

2017-03-30 18:27:19 382

转载 Semaphore控制访问量

public class UseSemaphore { public static void main(String[] args) { // 线程池 ExecutorService exec = Executors.newCachedThreadPool(); // 只能5个线程同时访问

2017-03-30 18:06:51 311

转载 CountDownLatch与CyclicBarrier

public class UseCountDownLatch { public static void main(String[] args) { final CountDownLatch countDown = new CountDownLatch(2); Thread t1 = new Thread(ne

2017-03-30 17:34:39 261

转载自定义线程池

有些时候 jdk自带的cachedThreadPool fixedThreadPool等线程池完成不了我们业务的需求时可以用ThreadPoolExecutorg构造自定义的线程池。public class UseThreadPoolExecutor1 { public static void main(String[] args) { /**

2017-03-30 16:42:55 334

转载多线程_消费者生产者模型

import java.util.Random;import java.util.concurrent.BlockingQueue;import java.util.concurrent.TimeUnit;import java.util.concurrent.atomic.AtomicInteger;public class Provider implements Runna

2017-03-30 16:17:56 272

转载 DelayQueue

public class WangBa implements Runnable { private DelayQueue queue = new DelayQueue(); public boolean yinye =true; public void shangji(String name,String id,in

2017-03-28 13:29:35 243

转载 ConcurrentLinkedQueue ArrayBlockingQueue SynchronousQueue例子

final SynchronousQueue q = new SynchronousQueue(); Thread t1 = new Thread(new Runnable() { @Override public void run() { try {

2017-03-28 12:10:21 397

转载优先级阻塞队列

public class Task implements Comparable{ private int id ; private String name; public int getId() { return id; } public void setId(int id) { this.id =

2017-03-28 11:52:45 349

转载单例-内部类

package com.bjsxt.base.conn011;public class Singletion { private static class InnerSingletion { private static Singletion single = new Singletion(); } public st

2017-03-28 10:45:40 276

转载多线程-阻塞队列

public class MyQueue { //1 需要一个承装元素的集合 private LinkedList list = new LinkedList(); //2 需要一个计数器 private AtomicInteger count = new AtomicInteger(0); //3 需要制定上

2017-03-28 10:37:03 288

翻译多线程学习笔记1

public class MutiSyn { public synchronized void method01(){ System.out.println("1"); method02(); } public synchronized void method02(){ System.out.println("2"

2017-03-28 10:03:14 232

原创关于java的内存泄露

先说一下内存泄露，内存泄露不会表现出明显的失败，可以在一个系统存在很多年，Heap的解析工具Heap Profiler可以发现内存泄露问题。这是一个内存泄露的经典例子，这个栈管理自己的内存，必须注意内存泄露问题，一旦元素被释放，该元素的任何对象引用都应该被清空package com.shi;import java.util.Arrays;import java.util

2016-11-27 17:16:42 249

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