java 多线程 day11 lock

import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * Created by chengtao on 17/12/5.
 * Lock 是替代 sycronized 的，相比sycronized 更加面向对象
 * java.util.concurrent.locks.Lock;
 * java.util.concurrent.locks.ReentrantLock;
 */
public class Thread1101_Lock {

    /**
     * @param args
     */
    public static void main(String[] args)throws  Exception {
        new Thread1101_Lock().init();
    }

    private void init() throws Exception{
        final Outputer outputer = new Outputer();
        new Thread(new Runnable(){
            public void run() {
                while(true){
                    try {
                        Thread.sleep(10);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                    outputer.output("zhangxiaoxiang");
                }

            }
        }).start();

        new Thread(new Runnable(){
            public void run() {
                while(true){
                    try {
                        Thread.sleep(10);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    outputer.output("lihuoming");
                }

            }
        }).start();

    }

    static class Outputer{
        Lock lock = new ReentrantLock();
        public void output(String name){
            int len = name.length();
            lock.lock();       //和output1 对比 lock和synchronized的异同
            try{
                for(int i=0;i<len;i++){
                    System.out.print(name.charAt(i));
                }
                System.out.println();
            }finally{
                lock.unlock(); //和output1 对比 lock和synchronized的异同
            }
        }

        /*
           通过同步代码块来控制，注意锁对象一定要唯一
         */
        public void output1(String name){
            int len = name.length();
            synchronized (Outputer.class) {
                for(int i=0;i<len;i++){
                    System.out.print(name.charAt(i));
                }
                System.out.println();
            }
        }

        public synchronized void output2(String name){
            int len = name.length();
            for(int i=0;i<len;i++){
                System.out.print(name.charAt(i));
            }
            System.out.println();
        }

        public static synchronized void output3(String name){
            int len = name.length();
            for(int i=0;i<len;i++){
                System.out.print(name.charAt(i));
            }
            System.out.println();
        }
    }
}
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java 多线程 day11 lock

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