/**
* Java線程：線程的同步
*
* @author leizhimin 2009-11-4 11:23:32
*/
public class Test {
        public static void main(String[] args) {
                User u = new User("張三", 100);
                MyThread t1 = new MyThread("線程A", u, 20);
                MyThread t2 = new MyThread("線程B", u, -60);
                MyThread t3 = new MyThread("線程C", u, -80);
                MyThread t4 = new MyThread("線程D", u, -30);
                MyThread t5 = new MyThread("線程E", u, 32);
                MyThread t6 = new MyThread("線程F", u, 21);

                t1.start();
                t2.start();
                t3.start();
                t4.start();
                t5.start();
                t6.start();
        }
}

class MyThread extends Thread {
        private User u;
        private int y = 0;

        MyThread(String name, User u, int y) {
                super(name);
                this.u = u;
                this.y = y;
        }

        public void run() {
                u.oper(y);
        }
}

class User {
        private String code;
        private int cash;

        User(String code, int cash) {
                this.code = code;
                this.cash = cash;
        }

        public String getCode() {
                return code;
        }

        public void setCode(String code) {
                this.code = code;
        }

        /**
         * 業(yè)務(wù)方法
         * @param x 添加x萬元
         */
        public synchronized void oper(int x) {
                try {
                        Thread.sleep(10L);
                        this.cash += x;
                        System.out.println(Thread.currentThread().getName() + "運(yùn)行結(jié)束，增加“" + x + "”，當(dāng)前用戶賬戶余額為：" + cash);
                        Thread.sleep(10L);
                } catch (InterruptedException e) {
                        e.printStackTrace();
                }
        }

        @Override
        public String toString() {
                return "User{" +
                                "code='" + code + '\'' +
                                ", cash=" + cash +
                                '}';
        }
}

void notify()    
                    喚醒在此對象監(jiān)視器上等待的單個線程。    
void notifyAll()    
                    喚醒在此對象監(jiān)視器上等待的所有線程。    
void wait()    
                    導(dǎo)致當(dāng)前的線程等待，直到其他線程調(diào)用此對象的 notify() 方法或 notifyAll() 方法。    
void wait(long timeout)    
                    導(dǎo)致當(dāng)前的線程等待，直到其他線程調(diào)用此對象的 notify() 方法或 notifyAll() 方法，或者超過指定的時間量。    
void wait(long timeout, int nanos)    
                    導(dǎo)致當(dāng)前的線程等待，直到其他線程調(diào)用此對象的 notify() 方法或 notifyAll() 方法，或者其他某個線程中斷當(dāng)前線程，或者已超過某個實(shí)際時間量。