Ⅰ java同一个客户端同时多个请求实现排队等候
用队里吧。
建个队列,每次来个请求就向队列里塞。你如果知道生产者和消费者模式的话,就很好解决了。
Ⅱ java排队
排序就排序呗。
数据量不大,排序花不了多少时间的。
其实既然你要求的“要求服务时间”是固定的,那么优先级就等于1+等待时间/要求服务时间。也就是优先级和等待时间是线性关系。而且,刚服务的那人等待时间被清0了,一定是最小的,所以这样:每处理一个业务,检查他时间到没,到了出队列,没到排队尾,因为他的等待时间是0,必然最小,而刚才没有做业务的,等待时间都同等增加的,所以他们的优先级次序没变,直接把下个拿过来办就行了
Ⅲ Java中应用线程银行排队系统
//您可以使用重入锁实现排队。
packagecom.lw;
importjava.util.concurrent.locks.Lock;
importjava.util.concurrent.locks.ReentrantLock;
{
privateintnumber=0;//创建一个变量
privateLocklock=newReentrantLock();//创建重入锁对象
@Override
publicvoidrun(){
lock.lock();//打开锁
try{
for(inti=0;i<5;i++){
try{
Thread.sleep(100);//线程休眠0.1秒
}catch(InterruptedExceptione){
e.printStackTrace();
}
//输出当前线程的名称和number的值,每次循环之后number的值都会加一
System.out.println(Thread.currentThread().getName()+":"
+number++);
}
}finally{
lock.unlock();//释放锁
}
}
publicstaticvoidmain(String[]args){
ReentrantLockDemorun=newReentrantLockDemo();//获得ReentrantLockDemo对象
Threadthread1=newThread(run);//创建线程1
Threadthread2=newThread(run);//创建线程2
thread1.start();//运行线程1
thread2.start();//运行线程2
}
}
Ⅳ java 排队执行怎么实现
用队列即可实现先进先出,对应的实现:LinkedList,在分布式环境上,可以用消息队列,如:rocketmq、kafka、activemq
Ⅳ 用java实现银行排队程序,要求模拟银行的业务排队系统,要有界面,实现完成的排队和叫号
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class BankWaiting extends JFrame implements ActionListener {
int total = 0, now = 0;
boolean is1Ready = false, is2Ready = false, is3Ready = false;
int call1, call2, call3;
JFrame jf;
JLabel jr, jl, jl1, j2, jl2, j3, jl3;
JTextField jr4;
JButton jb, jb1, jb2, j1;
JButton workBut1, workBut2, workBut3;
JPanel jp, jp1, jp2;
public BankWaiting() {
setLayout(null);
jf = new JFrame("银行叫号程序");// 窗体
jr = new JLabel("请**号到*号窗口办理业务");
jr.setBounds(300, 10, 800, 50);
jr.setForeground(Color.red);
j1 = new JButton("取号");
j1.addActionListener(this);
jr4 = new JTextField("欢迎");
jr4.setEditable(false);
ButtonGroup bg = new ButtonGroup();
bg.add(j1);
jp = new JPanel();
jl = new JLabel("一号窗口");
jl1 = new JLabel("一号窗口,欢迎你!");
jb = new JButton("下一位");
workBut1 = new JButton("开始办理");
workBut1.addActionListener(this);
jb.addActionListener(this);
jp.setBackground(Color.pink);
jp.setSize(200, 80);// 大小
jp.setLocation(20, 120); // 位置
jf.setLayout(null);
jp1 = new JPanel();
j2 = new JLabel("二号窗口");
jl2 = new JLabel("二号窗口,欢迎你!");
jb1 = new JButton("下一位");
workBut2 = new JButton("开始办理");
jb1.addActionListener(this);
workBut2.addActionListener(this);
jp1.setBackground(Color.pink);
jp1.setSize(200, 80);// 大小
jp1.setLocation(250, 120); // 位置
jf.setLayout(null);
jp2 = new JPanel();
j3 = new JLabel("三号窗口");
jl3 = new JLabel("三号窗口,欢迎你!");
jb2 = new JButton("下一位");
workBut3 = new JButton("开始办理");
workBut3.addActionListener(this);
jb2.addActionListener(this);
jp2.setBackground(Color.pink);
jp2.setSize(200, 80);// 大小
jp2.setLocation(500, 120); // 位置
jf.setLayout(null);
jf.add(jp);
jf.add(jp1);
jf.add(jp2);
jf.add(jr);
jp.add(jl);
jp.add(jl1);
jp.add(jb);
jp.add(workBut1);
jp1.add(j2);
jp1.add(jl2);
jp1.add(jb1);
jp1.add(workBut2);
jp2.add(j3);
jp2.add(jl3);
jp2.add(jb2);
jp2.add(workBut3);
jf.add(j1);
jf.add(jr4);
j1.setBounds(550, 300, 60, 30);
jr4.setBounds(300, 300, 200, 40);
jf.setSize(800, 600);
jf.setVisible(true);
jf.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
public void actionPerformed(ActionEvent e) {
String s = "";
if (e.getSource() == j1) {
s = "第" + (++total) + "号,前面还有" + (total - now - 1) + "位顾客!";
jr4.setText(s);
}
if (e.getSource() == jb) {
if (this.hasCustomers()) {
s = "请" + (++now) + "号顾客到一号窗口办理";
call1 = now;
jl1.setText(s);
jr.setText(s);
is1Ready = true;
} else {
s = "当前已经没有顾客了";
jl1.setText(s);
is1Ready = false;
}
} else if (e.getSource() == jb1) {
if (this.hasCustomers()) {
s = "请" + (++now) + "号顾客到二号窗口办理";
call2 = now;
jl2.setText(s);
jr.setText(s);
is2Ready = true;
} else {
s = "当前已经没有顾客了";
jl2.setText(s);
is2Ready = false;
}
} else if (e.getSource() == jb2) {
if (this.hasCustomers()) {
s = "请" + (++now) + "号顾客到三号窗口办理";
call3 = now;
jl3.setText(s);
jr.setText(s);
is3Ready = true;
} else {
s = "当前已经没有顾客了";
jl3.setText(s);
is3Ready = false;
}
}
if (e.getSource() == workBut1) {
if (is1Ready) {
s = call1 + "号顾客正在办理业务。。。";
jl1.setText(s);
is1Ready = false;
}
} else if (e.getSource() == workBut2) {
if (is2Ready) {
s = call2 + "号顾客正在办理业务。。。";
jl2.setText(s);
is2Ready = false;
}
} else if (e.getSource() == workBut3) {
if (is3Ready) {
s = call3 + "号顾客正在办理业务。。。";
jl3.setText(s);
is3Ready = false;
}
}
}
public boolean hasCustomers() {
if (now < total) {
return true;
} else {
return false;
}
}
public static void main(String[] args) {
new BankWaiting();
}
}
Ⅵ 用多线程实现银行排队功能java
package com.lw;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class ReentrantLockDemo implements Runnable {
private int number = 0;// 创建一个变量
private Lock lock = new ReentrantLock();// 创建重入锁对象
@Override
public void run() {
lock.lock();// 打开锁
try {
for (int i = 0; i < 5; i++) {
try {
Thread.sleep(100);// 线程休眠0.1秒
} catch (InterruptedException e) {
e.printStackTrace();
}
// 输出当前线程的名称和number的值,每次循环之后number的值都会加一
System.out.println(Thread.currentThread().getName() + ": "
+ number++);
}
} finally {
lock.unlock();// 释放锁
}
}
public static void main(String[] args) {
ReentrantLockDemo run = new ReentrantLockDemo();// 获得ReentrantLockDemo对象
Thread thread1 = new Thread(run);// 创建线程1
Thread thread2 = new Thread(run);// 创建线程2
thread1.start();// 运行线程1
thread2.start();// 运行线程2
}
}