java红绿灯_用java编写交通信号灯

Ⅰ java 线程实现一个红绿灯问题

关键是启动一个线程控制颜色。代码如下。

import java.applet.Applet;
import java.awt.Color;
import java.awt.Graphics;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheledExecutorService;
import java.util.concurrent.TimeUnit;

public class Signal extends Applet {
int width = 200, height = 240;
int w = 50, h = 50;
int x = (width - w) / 2, y1 = (height - h * 3) / 3, y2 = y1 + h, y3 = y2 + h;
Color c = Color.RED;

@Override
public void init() {
ScheledExecutorService exec = Executors.newScheledThreadPool(1);
exec.scheleAtFixedRate(new Runnable() {
@Override
public void run() {
if (c == Color.RED) {
c = Color.YELLOW;
} else if (c == Color.YELLOW) {
c = Color.GREEN;
} else if (c == Color.GREEN) {
c = Color.RED;
}
repaint();
}
}, 5, 5, TimeUnit.SECONDS);
}

@Override
public void paint(Graphics g) {
setBackground(Color.white);

// all gray
g.setColor(Color.LIGHT_GRAY);
g.fillOval(x, y1, w, h);
g.fillOval(x, y2, w, h);
g.fillOval(x, y3, w, h);

if (c == Color.RED) {
g.setColor(Color.RED);
g.fillOval(x, y1, w, h);
} else if (c == Color.YELLOW) {
g.setColor(Color.YELLOW);
g.fillOval(x, y2, w, h);
} else if (c == Color.GREEN) {
g.setColor(Color.GREEN);
g.fillOval(x, y3, w, h);
}
}
}

Ⅱ 使用java多线程和图形编程，完成红绿灯模拟软件

boolean flag = true;
while(flag){
//绿灯显示

//sleep(3000);

//黄灯显示

sleep(3000);

//红灯显示

sleep(3000);
}

如果点击结束，退出while

Ⅲ Java红绿灯求大神！！急啊

importjava.awt.Color;
importjava.awt.Container;
importjava.awt.Dimension;
importjava.awt.FlowLayout;
importjava.awt.Graphics;
importjava.awt.event.ActionEvent;
importjava.awt.event.ActionListener;
importjavax.swing.JButton;
importjavax.swing.JFrame;
importjavax.swing.JPanel;
publicclassWayextendsJPanel{
JButtonred;
publicWay(){
red=newJButton("换灯");
setBackground(Color.yellow);
setSize(newDimension(320,260));
setPreferredSize(newDimension(320,260));
JPanelbtnPanel=newJPanel();
btnPanel.setLayout(newFlowLayout());
red.setLayout(newFlowLayout());//将单选按钮加入按钮面板
btnPanel.add(red);
add(red);
}
privatevoidlightRed(Graphicsg){
g.setColor(Color.red);
g.fillOval(getWidth()/2,30,15,15);
g.setColor(Color.black);
g.fillOval(getWidth()/2,50,15,15);
g.fillOval(getWidth()/2,70,15,15);
}
privatevoidlightYellow(Graphicsg){
g.setColor(Color.yellow);
g.fillOval(getWidth()/2,50,15,15);
g.setColor(Color.black);
g.fillOval(getWidth()/2,30,15,15);
g.fillOval(getWidth()/2,70,15,15);
}
privatevoidlightGreen(Graphicsg){
g.setColor(Color.green);
g.fillOval(getWidth()/2,70,15,15);
g.setColor(Color.black);
g.fillOval(getWidth()/2,30,15,15);
g.fillOval(getWidth()/2,50,15,15);
}
protectedvoidpaintComponent(Graphicsg){
super.paintComponents(g);
Waya=newWay();
g.clearRect(0,0,getWidth(),getHeight());
g.drawRect(getWidth()/2,30,30,80);
red.addActionListener(newActionListener(){
intf1=0;
publicvoidactionPerformed(ActionEvente){
Graphicsg=getGraphics();
switch(f1){
case0:
a.lightRed(g);
break;
case1:
a.lightYellow(g);
break;
case2:
a.lightGreen(g);
break;
}
f1++;
if(f1>2)f1=0;
};
});
}
publicstaticvoidmain(String[]args){
JFramefr=newJFrame("邮件界面模拟");
fr.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//点击x结束程序
ContainercontentPane=fr.getContentPane();
//得到窗口内容面板
contentPane.add(newWay());
fr.pack();
fr.setVisible(true);//设置窗口可见
}
}

大致帮你改了下，不知道符合不符合你的要求，有问题请追问

Ⅳ 【急求】高手帮忙编写红绿灯的JAVA程序，有图形界面灯会跳的那种！

看一下这个行不行？
--------------------------------------------------------------------------------------------------------------
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class App extends JFrame {
public App() {
setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(107, 252);
setLocationRelativeTo(null);
getContentPane().setLayout(new BorderLayout(0, 0));
MyColorPanel panel = new MyColorPanel();
getContentPane().add(panel, BorderLayout.CENTER);
setVisible(true);
new Thread(panel).start();
}
public static void main(String[] args) {
new App();
}
}
class MyColorPanel extends JPanel implements Runnable {
private Color[] colors = { Color.RED, Color.YELLOW, Color.GREEN };
private int[] y = { 10, 70, 130 };
private int[] time = { 3, 1, 5 };
private int index = 2;
protected void paintComponent(Graphics g) {
super.paintComponent(g);
int width = 50;
int x = 30;
for (int i = 0; i < y.length; i++) {
g.fillOval(x, y[i], width, width);
}
g.setColor(colors[index]);
g.fillOval(x, y[index], width, width);
}
public void run() {
while (true) {
try {
Thread.sleep(time[index] * 1000);
index--;
repaint();
if (index < 0) {
index = 2;
}
} catch (Exception e) {
}
}
}
}

Ⅳ 求一个简易的JAVA程序---红绿灯，有两个部分，用下拉表控制灯的颜色，选择红，画布中的灯就变红的那种

按照你的要求，写出的程序如下：
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class TrafficLight {
JFrame jf=new JFrame("Traffic Light");
JPanel jp=new JPanel();
JComboBox jcb=new JComboBox();
public TrafficLight(){
jcb.addItem("红灯");
jcb.addItem("黄灯");
jcb.addItem("绿灯");
jcb.addItemListener(new JComboBoxListener());
jf.add(jcb,BorderLayout.NORTH);
jf.add(jp,BorderLayout.CENTER);

jf.setSize(400,400);
jf.setVisible(true);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}
public static void main(String[] args) {
// TODO Auto-generated method stub
new TrafficLight();
}
class JComboBoxListener implements ItemListener{
@Override
public void itemStateChanged(ItemEvent ie) {
Graphics g=jf.getGraphics();
if(ie.getItem().equals("红灯")){
g.setColor(Color.RED);
g.fillOval(200, 200, 100, 100);
}else if(ie.getItem().equals("黄灯")){
g.setColor(Color.YELLOW);
g.fillOval(200, 200, 100, 100);
}else if (ie.getItem().equals("绿灯")){
g.setColor(Color.GREEN);
g.fillOval(200, 200, 100, 100);
}
}
}
}

Ⅵ java 红绿灯代码

给程序一个变量tag 用来记录按键次数~~

tag%2==0时为绿
tag%2==1时为红
tag%2==2时为黄

Ⅶ 请帮我看下这个JAVA的程序(简易红绿灯)

发现你的程序窗体大小每改变一次，都会加上三个RadioButtons。

Ⅷ 用java编写交通信号灯

按照你的要求编写的红绿灯程序，你看看吧，比较简单。
完整的程序如下：
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.Graphics;
public class TrafficLight extends JFrame{
JRadioButton jrbYellow,jrbGreen,jrbRed;
int flag=0;
jpNewPanel jpNewPanel;
public static void main(String[] args){
TrafficLight frame=new TrafficLight();
frame.setSize(500,200);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle("TrafficLight");
frame.setVisible(true);
}
public TrafficLight(){
jpNewPanel=new jpNewPanel();
add(jpNewPanel,BorderLayout.CENTER);
JPanel jpRadioButtons=new JPanel();
jpRadioButtons.setLayout(new GridLayout(1,3));
jpRadioButtons.add(jrbYellow=new JRadioButton("Yellow"));
jpRadioButtons.add(jrbGreen=new JRadioButton("Green"));
jpRadioButtons.add(jrbRed=new JRadioButton("Red"));
add(jpRadioButtons,BorderLayout.SOUTH);
ButtonGroup group=new ButtonGroup();
group.add(jrbYellow);
group.add(jrbGreen);
group.add(jrbRed);

jrbYellow.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
flag=2;
jpNewPanel.repaint();
}
});
jrbGreen.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
flag=1;
jpNewPanel.repaint();
}
});
jrbRed.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
flag=3;
jpNewPanel.repaint();
}
});
}
class jpNewPanel extends JPanel{
protected void paintComponent(Graphics g){
super.paintComponent(g);
g.drawRect(0,0,40,100);
g.drawOval(10,10,20,20);
g.drawOval(10,40,20,20);
g.drawOval(10,70,20,20);
if(flag==1){
g.setColor(Color.GREEN);
g.fillOval(10, 70, 20, 20);
}
else if(flag==2){
g.setColor(Color.YELLOW);
g.fillOval(10, 40, 20, 20);
}
else if(flag==3){
g.setColor(Color.RED);
g.fillOval(10, 10, 20, 20);
}
}
}
}

Ⅸ java 红绿灯 Thread 要求运行时下边出现红灯亮黄灯暗绿灯暗文字按照红黄绿顺序循环出现10次即可！

如果是使用多线程来做分别有红 \黄 \ 绿三个线程,是无法控制输出的顺序的,多线程的概念里有CPU随机执行的.
使用单线程控制吧用System.println.out() 打印还差不多
Code:
public class TrafficLightThread implements Runnable {

final static String RED = "红灯亮 ";
final static String YELLOW = "黄灯暗";
final static String GREEN = "绿灯暗";

public void run() {
for (int i = 10; i > 0; i--) {
System.out.println("---第"+i+"次---");
System.out.println(RED);
System.out.println(YELLOW);
System.out.println(GREEN);
}
}

public static void main(String[] args) {
new Thread(new TrafficLightThread()).start();
}
}

Ⅹ java控制红绿灯及模拟车辆运动

写两个程序分别模拟红绿灯和汽车：
1）红绿灯程序以报文形式通知汽车程序；
2）汽车程序需要用多线程来实现。
3）红绿灯程序用个循环，每隔n分钟红绿灯转换，同时通知汽车程序；

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