Java 多线程 AtomicInteger ThreadLocal

package thread.local;

import java.util.concurrent.atomic.AtomicInteger;

public class NumMake {

  private static final AtomicInteger uniqueId = new AtomicInteger(0);
  
  private static ThreadLocal<Integer> seqId = new ThreadLocal<Integer>() {
    public Integer initialValue() {
      return 0;
    }
  };

  /**
   * @author jzh add 2011-12-20
   * @return
   */
  public int getNextSeqId() {
    seqId.set(seqId.get() + 1);
    return seqId.get();
  }
  
  /**
   * 
   * @author jzh add 2011-12-20
   * @return
   */
  public int getNetUniqueId() {
    return uniqueId.incrementAndGet();
  }

}

package thread.local;

public class NumThread extends Thread {
  private NumMake num;
  private String name;

  public NumThread(String name, NumMake num) {
    super(name);
    this.num = num;
    this.name = name;
  }

  public void run() {
    for (int i = 0; i < 5; i++) {
      System.out.println(name + ", seqId = " + num.getNextSeqId()
          + ", uniqueId = " + num.getNetUniqueId());
      try {
        Thread.sleep(200);
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
  }
}

package thread.local;

public class NumTest {

  /**
   * @author jzh 2011-12-20
   * @param args
   */
  public static void main(String[] args) {
    NumMake num = new NumMake();
    Thread howskyThread = new NumThread("chanpinxue.cn", num);
    Thread jzhThread = new NumThread("jzh", num);
    howskyThread.start();
    jzhThread.start();
  }
}