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使用Java做一个走马灯，源代码？
import java.awt.Color;
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import java.awt.Dimension;
import java.awt.Font;
import java.awt.HeadlessException;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JViewport;
import javax.swing.Timer;
public class Test84 extends JFrame {
private Timer timer;
private JLabel view;
private JViewport window;
public static void main(String[] args)
{
JFrame frm = new Test84("跑马灯");
frm.setDefaultCloseOperation(EXIT_ON_CLOSE);
frm.pack();
frm.setVisible(true);
}
public Test84(String title) throws HeadlessException
{
super(title);
initComponents();
addComponentListener(new ComponentAdapter() {
public void componentResized(ComponentEvent e)
{
anchor = new Point();
anchor.x = -window.getExtentSize().width;
timer.start();
}
});
timer = new Timer(100, new ActionListener() {
public void actionPerformed(ActionEvent e)
{
animate();
}
});
timer.setInitialDelay(0);
}
private void initComponents()
{
String s = JOptionPane.showInputDialog(null, "请输入要实现效果的文字:");
view = new JLabel(s);
view.setFont(Font.decode("Dialog-BOLD-36"));
view.setForeground(Color.BLUE);
window = new JViewport();
window.setView(view);
getContentPane().add(window);
}
Point anchor;
private void animate()
{
Dimension extSize = window.getExtentSize();
Dimension viewSize = view.getPreferredSize();
anchor.x += 5;//设置移动的速度
window.setViewPosition(anchor);
if (anchor.x viewSize.width)
anchor.x = -extSize.width;
}
}
如何用java来实现灯泡异常问题
模拟了一下。。设置成B1按下时B4弹起，B4按下时B1弹起，不然有的时候电源是开是关不好判定。。如果B1/B4是一个按钮就好了 = =。为方便观察，间隔时间设为0.5s。另外加了两个按钮用来控制灯泡1、2是否故障。import java.awt.*;
import java.awt.event.*;
import javax.swing.*;class Bulb extends JFrame
{ private final int INTER_SECOND = 500; // 间隔时间 private BulbButton b1 = new BulbButton("B1");
private BulbButton b2 = new BulbButton("B2");
private BulbButton b3 = new BulbButton("B3");
private BulbButton b4 = new BulbButton("B4"); private BulbLight l1 = new BulbLight(1);
private BulbLight l2 = new BulbLight(2); private JButton bb1 = new BuldStateButton(l1);
private JButton bb2 = new BuldStateButton(l2); private JLabel state = new JLabel("关闭"); private CheckLightThread thread; public Bulb() {
this.setTitle("灯泡模拟");
this.setSize(300, 200);
this.setLayout(new GridLayout(4, 1)); this.add(new JPanel() {
{
this.setLayout(new FlowLayout(FlowLayout.CENTER));
this.add(new JLabel("电源状态："));
this.add(state);
}
}); this.add(new JPanel() {
{
this.setLayout(new FlowLayout(FlowLayout.CENTER));
this.add(l1);
this.add(l2);
}
}); this.add(new JPanel() {
{
this.setLayout(new FlowLayout(FlowLayout.CENTER));
this.add(b1);
this.add(b2);
this.add(b3);
this.add(b4);
}
}); this.add(new JPanel() {
{
this.setLayout(new FlowLayout(FlowLayout.CENTER));
this.add(bb1);
this.add(bb2);
}
}); setButtons(); this.setVisible(true);
} private void setButtons() {
b2.setEnabled(false);
b3.setEnabled(false);
b4.setSelected(true); b1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
b1.changeState();
if(b1.isSelected()) {
b4.setSelected(false);
b2.setEnabled(true);
b3.setEnabled(true);
} else {
b2.setSelected(false);
b3.setSelected(false);
b4.setSelected(true);
b2.setEnabled(false);
b3.setEnabled(false);
}
changeSystemState();
}
}); b2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(!b1.isSelected() b4.isSelected()) return; // 在电源关闭状态下，B2和B3按钮不起作用
b2.changeState();
if(b2.getCount() b3.getCount()) { // 如果B2被按下的次数比B3被按下的次数多，L1亮
l1.change(true);
l2.change(false);
}
}
}); b3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(!b1.isSelected() b4.isSelected()) return; // 在电源关闭状态下，B2和B3按钮不起作用
b3.changeState();
if(b3.getCount() = b2.getCount()) { // 如果B2被按下的次数比B3被按下的次数少，L2亮
l1.change(false);
l2.change(true);
}
}
}); b4.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
b4.changeState();
if(b4.isSelected()) {
b1.setSelected(false);
b2.setSelected(false);
b3.setSelected(false);
b2.setEnabled(false);
b3.setEnabled(false);
} else {
b1.setSelected(true);
b2.setEnabled(true);
b3.setEnabled(true);
}
changeSystemState();
}
});
} private void changeSystemState() {
if(!b1.isSelected() b4.isSelected()) { // 在电源关闭状态下，灯应不亮
state.setText("关闭");
l1.change(false);
l2.change(false);
thread.pause();
}
if(b1.isSelected() !b4.isSelected()) { // 从最近一次电源打开状态算起
state.setText("开启");
b2.clearCount();
b3.clearCount();
thread = new CheckLightThread();
thread.start();
}
} public static void main(String[] args)
{
new Bulb();
} private class BulbButton extends JToggleButton
{
private int count = 0; public BulbButton(String text) {
super(text);
} public void changeState() {
if(isSelected()) {
++count;
}
} public void clearCount() {
count = 0;
} public int getCount() {
return count;
} } private class BulbLight extends JPanel
{ private int id; private boolean bad; private boolean lightState; private JLabel label; private JLabel state = new JLabel("【暗】"); private JLabel state2 = new JLabel("-正常"); public BulbLight(int id) {
this.id = id;
label = new JLabel("灯泡" + id);
this.add(label);
this.add(state);
this.add(state2);
} public int getId() {
return id;
} public void light() {
this.state.setText("【" + ("【暗】".equals(this.state.getText())?"亮":"暗") + "】");
} public void change(boolean light) {
if(bad)return;
lightState = light;
this.state.setText("【" + (lightState?"亮":"暗") + "】");
} public boolean isBad() {
return bad;
} public void setState(boolean bad) {
this.bad = bad;
state2.setText((bad?"-故障":"-正常"));
if(bad) {
this.state.setText("【暗】");
} else {
this.state.setText("【" + (lightState?"亮":"暗") + "】");
}
} } private class BuldStateButton extends JButton implements ActionListener
{
private BulbLight light; public BuldStateButton(BulbLight light) {
super("破坏灯泡" + light.getId());
this.light = light;
this.addActionListener(this);
} public void actionPerformed(ActionEvent e) {
if(("破坏灯泡" + light.getId()).equals(this.getActionCommand())) {
this.setText("修复灯泡" + light.getId());
light.setState(true);
}
else {
this.setText("破坏灯泡" + light.getId());
light.setState(false);
}
}
} private class CheckLightThread extends Thread
{ private boolean runFlag = true; public void pause() {
this.runFlag = false;
} public void run() {
while(runFlag) {
try
{
if (l1.isBad() !l2.isBad())
{
l2.light();
}
if (!l1.isBad() l2.isBad())
{
l1.light();
}
sleep(INTER_SECOND);
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
}
}
}截图如下：
java创建灯泡类的一道题
public class Light {
boolean state;//灯的当前状态,false为关，true为开
int brightness;//灯的亮度，数值为0~100
/*初始化灯为关闭状态，亮度为0*/
public Light()
{
this.state=false;
this.brightness=0;
}
/*开关方法*/
public void turn()
{
if(this.state==true)
this.state=false;
else this.state=true;
}
/*获取状态方法*/
public boolean getState() {
return state;
}
/*获取灯泡亮度*/
public int getBrightness() {
return brightness;
}
/*调解灯泡亮度*/
public void setBrightness(int bn) {
if(this.state==true)//判断灯泡状态
if(bn=0bn=100) {//判断亮度调节值是不是合法
this.brightness = bn;
if(bn==0)//判断亮度是不是调到0
this.state=false;
}
}
public static void main(String[] args)
{
Light light=new Light();
light.turn();
System.out.println("当前灯泡状态:"+light.getState());
light.setBrightness(0);
System.out.println("当前灯泡亮度:"+light.getBrightness());
System.out.println("当前灯泡状态:"+light.getState());
light.setBrightness(10);
System.out.println("当前灯泡亮度:"+light.getBrightness());
System.out.println("当前灯泡状态:"+light.getState());
light.turn();
System.out.println("当前灯泡状态:"+light.getState());
light.setBrightness(10);
System.out.println("当前灯泡亮度:"+light.getBrightness());
System.out.println("当前灯泡状态:"+light.getState());
}
}
我建议你学习一下面向对象编程的思想方法
用eclipse编写Java源程序时，出现一个黄色的灯泡和感叹号是怎么回事啊？请前辈们指导下，谢谢了！
这是警告的意思。一般只要你用集合没有用泛型就会出来。或者有些过时的方法也会这样的情况发生。
分享题目：java灯泡动画的源代码 eclipse中灯泡+错什么意思
标题来源：http://lswzjz.com/article/dosgees.html
