public interface Lock{
  void lock(); //加锁
  //优先考虑响应中断，而不是响应锁定的普通获取或重入获取
  void lockInterruptibly() throws InterruptedException;
  boolean tryLock(); //可定时和可轮询的锁获取模式
  boolean tryLock(long timeout,TimeUnit unit) throws InterruptedException;
  void unlock(); //解锁
  Condition newCondition();
}

package com.ljq.test.thread;
 
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
 
/**
 * 用Lock替代synchronized
 *
 * @author Administrator
 *
 */
public class LockTest {
 
  public static void main(String[] args) {
    new LockTest().init();
  }
 
  private void init() {
    final Outputer outputer = new Outputer();
    //A线程
    new Thread(new Runnable() {
      @Override
      public void run() {
        while (true) {
          try {
            Thread.sleep(10);
          } catch (InterruptedException e) {
            e.printStackTrace();
          }
          outputer.output("zhangsan");
        }
 
      }
    }).start();
 
    //B线程
    new Thread(new Runnable() {
      @Override
      public void run() {
        while (true) {
          try {
            Thread.sleep(10);
          } catch (InterruptedException e) {
            e.printStackTrace();
          }
          outputer.output("lisi");
        }
 
      }
    }).start();
 
  }
 
  static class Outputer {
    Lock lock = new ReentrantLock();
 
    /**
     * 打印字符
     *
     * @param name
     */
    public void output(String name) {
      int len = name.length();
      lock.lock();
      try {
        for (int i = 0; i < len; i++) {
          System.out.print(name.charAt(i));
        }
        System.out.println();
      } finally {
        lock.unlock();
      }
    }
  }
}