讨论：写个闹钟小程序

[uYuOmooo]

想随便写个小闹钟程序，首先嘛，就是要显示当前系统的时间，在写线程的时候不会写了，下面是我的错误源代码，大家帮忙改进下，或者自己写的比较好的代码贴出来。改进后或自己写的代码最好自己先运行下可以后再贴出来哦。谢谢大家的讨论，have a nice day ^ - ^

import java.awt.BorderLayout;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.swing.JFrame;
import javax.swing.JLabel;


public class Clock{
	public SimpleDateFormat sdf;
	public String timeString;

	public static void main(String[] args){

		
		JFrame frame=new JFrame("yuzhenghzong clock!");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setSize(300,300);
		
		new Thread(new startClock()).start();
		
		JLabel label=new JLabel(timeString,JLabel.CENTER);
		
		frame.add(label,BorderLayout.CENTER);
		
		frame.setVisible(true);
	}
	
	class startClock implements Runnable{

		public void run() {
			// TODO Auto-generated method stub
			while(true){
				sdf=new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
				timeString = sdf.format(new Date());
				
				try {
					Thread.sleep(1000);
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}
		
	}
}

[阳二快跑]

import java.awt.BorderLayout;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.swing.JFrame;
import javax.swing.JLabel;


public class Clock{
    private SimpleDateFormat sdf;
    private JLabel label;
    
    public Clock(){
    	JFrame frame=new JFrame("yuzhenghzong clock!");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300,300);
        
        new Thread(new startClock()).start();
        
        label=new JLabel("",JLabel.CENTER);
        
        frame.add(label,BorderLayout.CENTER);
        
        frame.setVisible(true);
    }
    
    public static void main(String[] args){

        Clock cl=new Clock();
        
    }
    
    class startClock implements Runnable{

        public void run() {
            // TODO Auto-generated method stub
            while(true){
                sdf=new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
                label.setText( sdf.format(new Date()));
                
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
        
    }
}

这叫时钟不叫闹钟吧

[showde123]

时钟有数字式 也有图形式的哦

[刘葛曦]

看看去

[showde123]

帖子要沉了哦
给LZ参考一个

import java.awt.Color;
import java.util.*;
import java.awt.*;
import java.applet.*;

public class Clock extends Applet implements Runnable {
	
	private static final long serialVersionUID = 1L;
	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);
	}

	@SuppressWarnings("deprecation")
	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);
	}
	
}

[showde123]

上边是个老版本的

[-box-]

关注中！

[ZhaoRNash]

楼主，你那也叫闹钟啥，还真是奇怪了哈。。。。。。。。。。。。。

[CTea321]

是不是就是时钟啊
到某个时间的时候，触发一个事件，打开一个音频文件，响几声
呵呵

[fangfangff]

是不是真的可以闹的啊？？？

[猪乐乐1618]

谢谢楼主分享。。。

[chaner2002]

明显只是个时钟。。。。

[zhangzj27]

新手学习，谢谢。

[一洽客服系统]

run方法不要实例全局变量~~~~~~~sdf.
使用timer类更好点

[nj_dobetter]

import java.awt.BorderLayout;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.swing.JFrame;
import javax.swing.JLabel;

public class b{
static public SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");;
static public String timeString;
static JLabel label;
static java.util.Date date;
public static void main(String[] args){
JFrame frame=new JFrame("yuzhenghzong clock!");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(300,300);
startClock sc=new startClock();
label=new JLabel(timeString,JLabel.CENTER);
frame.getContentPane().setLayout(new BorderLayout());
frame.getContentPane().add(label,BorderLayout.CENTER);
frame.setVisible(true);
new Thread(sc).start();
}

static class startClock implements Runnable{

public void run() {
// TODO Auto-generated method stub
while(true){
date = null;
date=new Date();
timeString = sdf.format(date);
try {
label.setText(timeString);
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

}
}

[lizhi200404520]

路过