多线程同步操作银行账号

package _11;

class SynAccount {

double balance;

final double MAX=10000;

public SynAccount(double balance) {

this.balance=balance;

}

//取款同步方法

public synchronized void withdraw(double money) {

if(balance<money) {

try {

System.out.printf("取款%1$,.2f失败。");

wait();

}catch(InterruptedException e) {

e.printStackTrace();

}

}

balance-=money;

System.out.printf("取款%1$,.2f失败。余额:%2$,.2f\n",money,balance);

notify();

//唤醒等待队列的线程

}

//存款同步方法

public synchronized void deposit(double money) {

if(balance+money>=MAX) {

try {

System.out.printf("取款%1$,.2f失败。余额:%2$,.2f\n",money,balance);

wait();

//进入等待队列

}catch(InterruptedException e) {

e.printStackTrace();

}

}

balance+=money;

System.out.printf("取款%1$,.2f成功。余额:%2$,.2f\n",money,balance);

notify();

}

}

package _11;

public class SynThreads {

//取款线程

static class Withdrawer extends Thread{

SynAccount account;

public Withdrawer(SynAccount account) {

super();

this.account=account;

}

@Override

public void run() {

for(int i=0;i<8;i++) {

account.withdraw(2000);

}

}

}

static class Depositor extends Thread{

SynAccount account;

public Depositor(SynAccount account) {

this.account=account;

}

@Override

public void run() {

for(int i=0;i<8;i++) {

account.deposit(2000);

}

}

}

public static void main(String[]args) {

SynAccount account=new SynAccount(5000);

Thread withdraw=new Withdrawer(account);

Thread deposit=new Depositor(account);

withdraw.start();

deposit.start();

}

}