用java画的动态时钟

Myth丶恋晨 2021-07-24 21:35 432阅读 0赞

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI5NDU2MA_size_16_color_FFFFFF_t_70]

package shiyan2;
    import java.applet.Applet;
    import java.awt.Graphics;
    import java.util.Date;
    import java.util.Timer;
    import java.util.TimerTask;
    
    public class Clock extends Applet{ 
    	public void init(){ 
    		//定时器
    		Timer timer=new Timer();
    		//开个线程任务
    		TimerTask task=new TimerTask(){ 
    				
    			@Override
    			public void run() { 
    				//自动执行paint函数
    				repaint();
    				
    			}
    			
    		};
    		//定时器执行线程任务
    		timer.schedule(task,0,1000);
    	};
    	//窗体移动重复执行
    	public void paint(Graphics g){ 
    		
    		g.drawOval(200, 200, 300, 300);
    		int cx=200+300/2;
    		int cy=200+300/2;
    		
    		Date now =new Date();
    		int hour = now.getHours();
    		int second=now.getSeconds();
    		int minute=now.getMinutes();
    		//数字
    		g.drawString(hour+":"+minute+":"+second, 330, 600);
    		g.drawString("12", 200+300/2-10, 220);
    		g.drawString("3", 500-20, 200+300/2);
    		g.drawString("6", 200+300/2, 500-20);
    		g.drawString("9", 200+20, 200+300/2);
    		
    
    		//画线
    		drawLine(g,cx,cy,hour,minute,second,150);
    		
    		//画刻度
    		drawKedu(g,cx,cy,150);
    
    	};
    
    	public void drawKedu(Graphics g,int cx,int cy,int r){ 
    		//画大刻度,相差30度
    		for(int i=1;i<=12;i++)
    		{ 
    			double dz= Math.toRadians(30*i-90);
    			//得到大刻度两个端点的坐标
    			int x2=cx+(int)(r*Math.sin(dz));
    			int y2=cx+(int)(r*Math.cos(dz));
    			
    			int x1=cx+(int)((r-10)*Math.sin(dz));
    			int y1=cx+(int)((r-10)*Math.cos(dz));
    			
    			g.drawLine(x1, y1, x2, y2);
    				
    		}
    		//画小刻度,相差6度
    		for(int i=1;i<=60;i++)
    		{ 
    			double dz= Math.toRadians(6*i-90);
    			//得到小刻度两个端点的坐标
    			int x2=cx+(int)(r*Math.sin(dz));
    			int y2=cx+(int)(r*Math.cos(dz));
    			
    			int x1=cx+(int)((r-5)*Math.sin(dz));
    			int y1=cx+(int)((r-5)*Math.cos(dz));
    			
    			g.drawLine(x1, y1, x2, y2);
    				
    		}
    		
    	}
    	
    	public void drawLine(Graphics g,int cx,int cy,int hour,int minute,int second,int r) { 
    		if(hour<=12)
    		{ 
    			hour=hour*2;
    		}
    		//得到弧度
    		double sz = Math.toRadians((hour/24.0)*360-90);
    		double fz = Math.toRadians((minute/60.0)*360-90);
    		double mz = Math.toRadians((second/60.0)*360-90);
    		//得到时针坐标
    		int sx=cx+(int)((r-120)*Math.cos(sz));
    		int sy=cy+(int)((r-120)*Math.sin(sz));
    		
    		//得到分针坐标
    		int fx=cx+(int)((r-60)*Math.cos(fz));
    		int fy=cy+(int)((r-60)*Math.sin(fz));
    		
    		//得到秒针坐标
    		int mx=cx+(int)((r-30)*Math.cos(mz));
    		int my=cy+(int)((r-30)*Math.sin(mz));
    		
    		//画线
    		g.drawLine(cx, cy, sx, sy);
    		g.drawLine(cx, cy, fx, fy);
    		g.drawLine(cx, cy, mx, my);
    	}
    }

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