Java 多线程编程

1.synchronized/wait/notify

package javamultithread;

import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Tina
 */
public class Thread1 implements Runnable {

    private final Object current;
    private final Object next;
    private String name;

    public Thread1(String name, Object current, Object next) {
        this.name = name;
        this.current = current;
        this.next = next;
    }

    @Override
    public void run() {
        for (int i = 0; i < 10; i++) {
            synchronized (current) {
                synchronized (next) {
                    System.out.print(name);
                    if (name.equalsIgnoreCase("C")) {
                        System.out.println();
                    }
                    next.notify();
                }
                if (i < 9) {
                    try {
                        current.wait();
                    } catch (InterruptedException ex) {
                        Logger.getLogger(Thread1.class.getName()).log(Level.SEVERE, null, ex);
                    }
                }
            }
        }
    }

    public static void main(String[] args) {
        try {
            // TODO code application logic here
            Object o1 = new Object();
            Object o2 = new Object();
            Object o3 = new Object();
            Thread th1 = new Thread(new Thread1("A", o1, o2));
            Thread th2 = new Thread(new Thread1("B", o2, o3));
            Thread th3 = new Thread(new Thread1("C", o3, o1));
            th1.start();
            Thread.sleep(10);
            th2.start();
            Thread.sleep(10);
            th3.start();
            Thread.sleep(10);
        } catch (InterruptedException ex) {
            Logger.getLogger(JavaMultiThread.class
                    .getName()).log(Level.SEVERE, null, ex);
        }

    }
}

执行结果：

run:
ABC
ABC
ABC
ABC
ABC
ABC
ABC
ABC
ABC
ABC
成功构建 (总时间: 0 秒)