java倒计时十秒代码 java倒计时
用java编写一个倒计时器代码。
import java.awt.BorderLayout;import java.awt.Container;import java.awt.Font;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JTextField;public class TimerDemo extends JFrame implements ActionListener { private static final long serialVersionUID = 201306211111L; private JTextField screen = new JTextField("0"); private JButton start = new JButton("开始"); private JButton reset = new JButton("重置"); private JPanel panel = new JPanel(); private boolean isRunning; private int time; private int timeBetween; public TimerDemo(int timeBetween) { super("计时器"); this.timeBetween = timeBetween; try { init(); } catch (Exception e) { e.printStackTrace(); } } public TimerDemo() { super("计时器"); this.timeBetween = 100; try { init(); } catch (Exception e) { e.printStackTrace(); } } private void init() { panel.setLayout(new GridLayout()); panel.add(start); panel.add(reset); start.addActionListener(this); reset.addActionListener(this); screen.setFont(new Font("幼圆", Font.BOLD, 60)); screen.setHorizontalAlignment(JTextField.CENTER); screen.setEditable(false); Container c = getContentPane(); c.setLayout(new BorderLayout()); c.add(panel, BorderLayout.SOUTH); c.add(screen, BorderLayout.CENTER); this.setSize(200, 150); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setResizable(false); this.setLocationRelativeTo(null); this.setVisible(true); } public static void main(String[] args) { new TimerDemo(1);// 设定 1ms/次 // new TimerDemo(); } @Override public void actionPerformed(ActionEvent e) { if (e.getSource() == start) { if (start.getText().equals("开始")) { start.setText("暂停"); isRunning = true; } else if (start.getText().equals("暂停")) { start.setText("开始"); isRunning = false; } } if (e.getSource() == reset) { start.setText("开始"); screen.setText("0"); isRunning = false; time = 0; } new Thread(new TimeZone()).start(); } class TimeZone implements Runnable { @Override public void run() { while (isRunning) { time++; if (time = Integer.MAX_VALUE) { screen.setText("ERROR"); JOptionPane.showMessageDialog(null, "ERROR"); isRunning = false; } screen.setText(String.valueOf(time)); try { Thread.sleep(timeBetween); } catch (Exception e) { e.printStackTrace(); } } } }}
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怎么用java写个倒计时？
import javax.swing.*;
public class Test extends JFrame
{
JButton button;
JPanel panel;
Test1DaoJiShi2()
{
super("10秒计数器");
button=new JButton();
panel=new JPanel();
add(panel);
panel.add(button);
setSize(300,200);
setVisible(true);
ButtonAction tt=new ButtonAction();
tt.run();
}
class ButtonAction extends Thread
{
int i=10;
public void run() //线程在此开始执行
{
while(i!=0)
{
try
{
sleep(1000);
button.setText( "还有 " +i+ "秒 ");
i--;
}
catch(Exception eee)
{}
}
if(i==0)
{
JOptionPane.showMessageDialog(null, " 时间到！");
}
}
}
public static void main(String args[])
{
JFrame frm = new Test();
frm.dispose();
System.exit(0);
}
}
怎样用JAVA写一个10钟倒计时程序?
import java.awt.Color;
import java.util.*;
import java.awt.*;
import java.applet.*;
public class Clock extends Applet implements Runnable
{
Thread timer=null;
Label label;
int lastxs=50,lastys=30,lastxm=50,lastym=30,lastxh=50,lastyh=30;
public void init()
{
label=new Label(" ");
setBackground(Color.white);
add(label);
}
public void paint(Graphics g)
{
int xh,yh,xm,ym,xs,ys,s,m,h,xcenter,ycenter;
Date rightnow=new Date();
String today=rightnow.toLocaleString();
label.setText(today);
s=rightnow.getSeconds();
m=rightnow.getMinutes();
h=rightnow.getHours();
xcenter=100;
ycenter=80;
xs=(int)(Math.cos(s*3.14f/30-3.14f/2)*45+xcenter);
ys=(int)(Math.sin(s*3.14f/30-3.14f/2)*45+ycenter);
xm=(int)(Math.cos(m*3.14f/30-3.14f/2)*45+xcenter);
ym=(int)(Math.sin(m*3.14f/30-3.14f/2)*45+ycenter);
xh=(int)(Math.cos((h*30+m*2)*3.14f/180-3.14f/2)*30+xcenter);
yh=(int)(Math.sin((h*30+m*2)*3.14f/180-3.14f/2)*30+ycenter);
g.setFont(new Font("TimesToman",Font.PLAIN,14));
g.setColor(Color.orange);
g.fill3DRect(xcenter-50,ycenter-50,100,100,true);
g.setColor(Color.darkGray);
g.drawString("12",xcenter-5,ycenter-37);
g.drawString("3",xcenter+40,ycenter+3);
g.drawString("6",xcenter-3,ycenter+45);
g.drawString("9",xcenter-45,ycenter+3);
g.setColor(Color.orange);
if(xs!=lastxs||ys!=lastys)
{
g.drawLine(xcenter,ycenter,lastxs,lastys);
}
if(xm!=lastxm||ym!=lastym)
{
g.drawLine(xcenter,ycenter-1,lastxm,lastym);
g.drawLine(xcenter-1,ycenter,lastxm,lastym);
}
if(xh!=lastxh||yh!=lastyh)
{
g.drawLine(xcenter,ycenter-1,lastxh,lastyh);
g.drawLine(xcenter-1,ycenter,lastxh,lastyh);
}
g.setColor(Color.red);
g.drawLine(xcenter,ycenter,xs,ys);
g.drawLine(xcenter,ycenter-1,xm,ym);
g.drawLine(xcenter-1,ycenter,xm,ym);
g.drawLine(xcenter,ycenter-1,xh,yh);
g.drawLine(xcenter-1,ycenter,xh,yh);
lastxs=xs;
lastys=ys;
lastxm=xm;
lastym=ym;
lastxh=xh;
lastyh=yh;
}
public void start()
{
if(timer==null)
{
timer=new Thread(this);
timer.start();
}
}
public void stop()
{
timer=null;
}
public void run()
{
while(timer!=null)
{
try
{
Thread.sleep(1000);
}catch(InterruptedException ie){}
repaint();
}
timer=null;
}
public void update(Graphics g)
{
paint(g);
}
}
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