Java并发学习之十——用线程工厂创建线程

1、工厂模式是最有用的设计模式。它是一个创造模式，还有他的目的是创建一个 或者几个类对象的对象。有了这个工厂，我们有这些优势集中创建对象：

更简单的改变了类的对象创建或者说创建这些对象的方式；

更简单的为了限制的资源限制了对象的创建。

更简单的生成创建对象的统计数据。

2、Java提供一个接口，ThreadFactory接口实现一个线程对象工厂

package chapter;  
  
import java.util.ArrayList;  
import java.util.Date;  
import java.util.Iterator;  
import java.util.List;  
import java.util.concurrent.ThreadFactory;  
  
public class MyTreadFactory implements ThreadFactory{  
  
    private int counter;  
    private String name;  
    private List<String> stats;  
    public MyTreadFactory(String name){  
        counter = 0;  
        this.name = name;  
        stats = new ArrayList<String>();  
    }  
    @Override  
    public Thread newThread(Runnable r) {  
        Thread t = new Thread(r,name+"_Thread_"+counter);  
        counter++;  
        stats.add(String.format("Created thread %d with name %s on %s\n", t.getId(),t.getName(),new Date()));  
        return t;  
    }  
  
    public String getStatuts(){  
        StringBuffer buffer = new StringBuffer();  
        Iterator<String> it = stats.iterator();  
        while(it.hasNext()){  
            buffer.append(it.next());  
            buffer.append("\n");  
        }  
        return buffer.toString();  
    }  
}  

package chapter;  
  
import java.util.concurrent.TimeUnit;  
  
public class Task12 implements Runnable{  
  
    @Override  
    public void run() {  
  
        try {  
            TimeUnit.SECONDS.sleep(1);  
        } catch (InterruptedException e) {  
            e.printStackTrace();  
        }  
    }  
  
}  

package chapter;  
  
public class Main12 {  
  
    /** 
     * <p> 
     * </p> 
     * @author zhangjunshuai 
     * @date 2014-8-25 下午6:58:42 
     * @param args 
     */  
    public static void main(String[] args) {  
  
        MyTreadFactory factory = new MyTreadFactory("MyTreadFactory");  
        Task12 task = new Task12();  
        Thread thread;  
        System.out.println("Starting the Threads ");  
        for (int i = 0; i < 10; i++) {  
            thread = factory.newThread(task);  
            thread.start();  
        }  
        System.out.println("Factory stats:");  
        System.out.printf("%s\n",factory.getStatuts());  
    }  
  
}