java编写时钟

最新推荐文章于 2021-02-20 23:07:47 发布

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最新推荐文章于 2021-02-20 23:07:47 发布

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分类专栏： java 时钟

本文链接：https://blog.youkuaiyun.com/qq_44102261/article/details/103619650

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本文介绍了如何使用Java编程语言来创建一个时钟应用。通过编程，实现了时钟的实时显示，包括小时、分钟和秒针的动态更新。运行截图展示了程序的实际效果。

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java编写时钟

//java编写时钟
package test;
import java.awt.Color;
import java.awt.Graphics;  
import java.awt.Graphics2D;  
import java.awt.geom.Ellipse2D;  
import java.awt.geom.Line2D;  
import java.util.Calendar;  
import java.util.GregorianCalendar;  
import java.util.Timer;  
import java.util.TimerTask;
import javax.swing.JLabel;
import javax.swing.JFrame;  
import javax.swing.JPanel;  
/**
 * @author stu
 */
@SuppressWarnings("serial")
public class huitu extends JFrame {  
    MyPanel clockPanel;  
    Ellipse2D.Double e;  
    int x;  
    int y;  
    Line2D.Double hourLine;
    int hourLinex;
    int hourLiney;
    Line2D.Double minLine; 
    int minLinex;
    int minLiney;
    Line2D.Double secondLine; 
    int secondLinex;
    int secondLiney;
    GregorianCalendar calendar;  
    int hour;  
    int minute;  
    int second;  
    public static final int X = 125;  
    public static final int Y = 125; 
    public static final int RADIAN = 100;  
    JLabel label1 = new JLabel("Hour" + hour + "Minute" + minute + "second" + second);
  
    public huitu() {
        setBounds(400,200,300,400);
        clockPanel = new MyPanel();
        label1.setBounds(50, 235, 200, 30);
        label1.setForeground(Color.red);
        add(label1);
        add(clockPanel);  
        Timer t = new Timer();  
        Task task = new Task();  
        t.schedule(task, 0, 1000);  
    }  
  
    public static void main(String[] args) {  
        huitu t = new huitu();  
        t.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
        t.setSize(300, 300);
        t.setVisible(true);  
    } 
    
 class MyPanel extends JPanel 
    {  
        @Override
        public void paintComponent(Graphics g) {  
            super.paintComponent(g);  
            Graphics2D g2 = (Graphics2D) g; 
            int i = 0;
            for(i = 0; i < 60; i ++)
            {
         int zx1 = (int) (X + 100  * Math.sin(i * (Math.PI / 30) ));  
         int zy1 = (int) (Y + 100  * Math.cos(i * (Math.PI / 30) ));
         int h;
         if( i % 5 == 0)
             h = 90;
         else
             h = 95;
             int zx2 = (int) (X + h  * Math.sin(i * (Math.PI / 30) ));
             int zy2 = (int) (Y + h  * Math.cos(i * (Math.PI / 30) ));
             g2.setColor(Color.red);
             g2.drawLine(zx1, zy1, zx2, zy2);
            }
            g2.setColor(Color.black);
            g2.drawString("12", 120, 22);  
            g2.drawString("6", 122, 238);  
            g2.drawString("9", 15, 130);  
            g2.drawString("3", 228, 130);
            g2.drawOval(25, 25, 200, 200);
            g2.setColor(Color.green);          //时针颜色
            g2.drawLine(X, Y, hourLinex, hourLiney);
            g2.setColor(Color.blue);           //分针颜色
            g2.drawLine(X, Y, minLinex, minLiney);
            g2.setColor(Color.red);            //秒针颜色
            g2.drawLine(X, Y, secondLinex, secondLiney);
        }  
    }  
  
    class Task extends TimerTask {  
        @Override
        public void run() {  
            calendar = new GregorianCalendar();  
            hour = calendar.get(Calendar.HOUR);  
            minute = calendar.get(Calendar.MINUTE);  
            second = calendar.get(Calendar.SECOND);           
            hourLinex = (int) (X + 60 * Math.sin(hour * (Math.PI / 6)));
            hourLiney = (int) (Y - 60 * Math.cos(hour * (Math.PI / 6)));              
            minLinex = (int) (X + 75  * Math.sin(minute * (Math.PI / 30)));
            minLiney = (int) (Y - 75  * Math.cos(minute * (Math.PI / 30)));        
            secondLinex = (int) (X + 85  * Math.sin(second * (Math.PI / 30)) );
            secondLiney = (int) (Y - 85  * Math.cos(second * (Math.PI / 30)) );
            label1.setText("Hour:" + hour + "  " + "Minute:"+ minute + "  " + "second:" + second);
            repaint();  
        }  
    }  
  
}

运行截图：
在这里插入图片描述