Java實現動態模擬時鐘
阿新 • • 發佈:2020-01-07
本文例項為大家分享了java動態模擬時鐘的具體程式碼,供大家參考,具體內容如下
應用名稱:java動態模擬時鐘
用到的知識:javaGUI,java 繪圖
開發環境:win10+eclipse+jdk1.8
功能說明:通過java繪圖畫出一個虛擬的動態時鐘
效果圖:
原始碼:
import javax.swing.*; import java.awt.*; import java.util.*; import java.lang.Thread; import java.text.DecimalFormat; public class StillClock extends JPanel { /** * @param args */ private int hour; private int minute; private int second; //建構函式 public StillClock() { setCurrentTime(); } //返回小時 public int getHour() { return hour; } public int getMinute() { return minute; } public int getSecond() { return second; } //繪製時鐘 protected void paintComponent(Graphics g) { super.paintComponent(g); //初始化 int clockRadius = (int)(Math.min(getWidth(),getHeight()) * 0.8 * 0.5); int xCenter = getWidth() / 2; int yCenter = getHeight() / 2; //畫圓 g.setColor(Color.black); g.drawOval(xCenter - clockRadius,yCenter - clockRadius,2 * clockRadius,2 * clockRadius); g.drawString("12",xCenter - 5,yCenter - clockRadius + 15); g.drawString("9",xCenter - clockRadius + 3,yCenter + 5); g.drawString("3",xCenter + clockRadius - 10,yCenter + 3); g.drawString("6",xCenter - 3,yCenter + clockRadius - 3); //畫秒針 int sLength = (int)(clockRadius * 0.8); int xSecond = (int)(xCenter + sLength * Math.sin(second * (2 * Math.PI / 60))); int ySecond = (int)(yCenter - sLength * Math.cos(second * (2 * Math.PI / 60))); g.setColor(Color.red); g.drawLine(xCenter,yCenter,xSecond,ySecond); //畫分針 int mLenth = (int)(clockRadius * 0.65); int xMinute = (int)(xCenter + mLenth * Math.sin(minute * (2 * Math.PI / 60))); int yMinute = (int)(xCenter - mLenth * Math.cos(minute * (2 * Math.PI / 60))); g.setColor(Color.blue); g.drawLine(xCenter,xMinute,yMinute); //畫時針 int hLength = (int)(clockRadius * 0.5); int xHour = (int)(xCenter + hLength * Math.sin((hour % 12 + minute / 60.0) * (2 * Math.PI / 12))); int yHour = (int)(yCenter - hLength * Math.cos((hour % 12 + minute / 60.0) * (2 * Math.PI / 12))); g.setColor(Color.green); g.drawLine(xCenter,xHour,yHour); //畫數字時鐘 g.setColor(Color.black); DecimalFormat s=new DecimalFormat("00"); g.drawString(s.format(getHour()) + ":" + s.format(getMinute()) + ":" + s.format(getSecond()),xCenter - 22,yCenter - clockRadius - 15); } public void setCurrentTime() { Calendar calendar = new GregorianCalendar(); this.hour = calendar.get(Calendar.HOUR_OF_DAY); this.minute = calendar.get(Calendar.MINUTE); this.second = calendar.get(Calendar.SECOND); } public static void main(String[] args) { // TODO Auto-generated method stub JFrame frame = new JFrame("DiaplayClock"); frame.setResizable(false); frame.setTitle("DiaplayClock"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(300,350); frame.setVisible(true); while(true) { StillClock clock = new StillClock(); frame.getContentPane().add(clock); clock.setVisible(true); frame.validate(); try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } clock.setVisible(false); frame.remove(clock); clock = null; frame.validate(); } } }
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支援我們。