本文实例为大家分享了java实现时钟表盘的具体代码，供大家参考，具体内容如下
设计并实现一个模拟时钟功能的应用程序。程序中应显示时针、分针和秒针，并同时以数字形式显示当前时间。
实现结果：
源代码如下：
//clockpanel.java
import javax.swing.*;
import java.util.calendar;
import java.util.gregoriancalendar;
import java.util.timer;
import java.util.timertask;
import java.text.simpledateformat;
import java.util.locale;
import java.awt.*;
import java.awt.event.*;
public class clockpanel extends jpanel{
private gregoriancalendar calendar;
private jbutton btn;
private jbutton btn2;
private int currentstate=8;
private string zone;
private int hourtemp;
final int x=320, y=240, r=120; // 圆心坐标，半径
private int xpos,ypos;
private int hour,minute,second;
private int xhour,yhour,xminute,yminute,xsecond,ysecond;//表针位置（大端）
private int xhour1,yhour1,xminute1,yminute1,xsecond1,ysecond1;//表针位置（小端）
private double a_sec,a_min ,a_hour;//角度
clockpanel() { // 创建定时器对象
timer t = new timer();
task task = new task();
t.schedule(task, 0, 1000);
setlayout(new borderlayout(10,20));
btn=new jbutton("时区 上");
btn2=new jbutton("时区 下");
btn.setborder(borderfactory.createraisedbevelborder());
btn2.setborder(borderfactory.createraisedbevelborder());
btn.setbackground(color.green);
btn2.setbackground(color.green);
btn.addactionlistener(new buttonlistener());
btn2.addactionlistener(new buttonlistener());
add(btn,borderlayout.west);
add(btn2,borderlayout.east);
}
//相关事件处理
private class buttonlistener implements actionlistener {
public void actionperformed(actionevent event) {
if (event.getsource()==btn)
currentstate++;
if (event.getsource()==btn2)
currentstate--;
}
}
public void paintcomponent(graphics g){
super.paintcomponent(g);
double alfa; //所画点对应的角度
graphics2d g2d=(graphics2d)g;
basicstroke bstroke=new basicstroke(1.0f);
basicstroke bstroke2=new basicstroke(2.0f);
basicstroke bstroke3=new basicstroke(3.0f);
g2d.setstroke(bstroke2);
for(int i=0;i<=360;i+=6) {
alfa=math.toradians(i); //角度用弧度表示
xpos=x+(int)(r*math.cos(alfa)); // x坐标
ypos=y-(int)(r*math.sin(alfa)); // y坐标
int xbegin=320+(int)(144*math.sin(alfa));
int ybegin=240-(int)(144*math.cos(alfa));
int xend=320+(int)(159*math.sin(alfa));
int yend=240-(int)(159*math.cos(alfa));
g2d.setcolor(color.black);
g2d.drawline(xbegin,ybegin,xend,yend);
g2d.setcolor(color.red);
switch(i){ // 写时钟数字刻度
case 0: g2d.drawstring("3", xpos,ypos);
break;
case 90: g2d.drawstring("12", xpos,ypos);
break;
case 180: g2d.drawstring("9", xpos,ypos);
break;
case 270: g2d.drawstring("6",xpos,ypos);
break;
}
if(i%30==0){
g2d.drawline(xbegin,ybegin,xend,yend);
}
}
g2d.setcolor(color.black);
g2d.setstroke(bstroke3);
g2d.drawline(x, y, xhour,yhour); // 画时针
g2d.drawline(x, y, xhour1,yhour1);
g2d.setcolor(color.blue);
g2d.setstroke(bstroke2);
g2d.drawline(x, y, xminute,yminute); // 画分针
g2d.drawline(x, y, xminute1,yminute1);
g2d.setcolor(color.red);
g2d.setstroke(bstroke);
g2d.drawline(x, y, xsecond,ysecond); // 画秒针
g2d.drawline(x, y, xsecond1,ysecond1);
//表盘中心点1
g2d.drawoval(317,237,6,6);
g2d.filloval(317,237,6,6);
//表盘中心点2
g2d.setcolor(color.black);
g2d.drawoval(319,238,4,4);
g2d.filloval(319,238,4,4);
//表盘中心圆环
g2d.setcolor(color.orange);
g2d.drawoval(300,220,40,40);
g2d.setcolor(color.black);
g2d.drawstring("15010140079",290,376);
gregoriancalendar gre=new gregoriancalendar();
simpledateformat dateforamt1=new simpledateformat("yyyy年mm月dd日e");
//simpledateformat dateforamt2=new simpledateformat("h时m分s秒");
g2d.setcolor(color.black);
g2d.setfont(new font("san_serif",font.bold,20));
g2d.drawstring(dateforamt1.format(gre.gettime()),250,50);
g2d.drawstring(hour+"时"+minute+"分"+second+"秒",260,430);
//时区判断
if(currentstate>12){
currentstate=-11;
}
else if(currentstate<-11){
currentstate=12;
}
if(currentstate<=12&¤tstate>=1)
zone="东"+currentstate+"区";
else
zone="西"+(1-currentstate)+"区";
g2d.drawstring(zone,170,50);
}
class task extends timertask {
public void run() {
calendar = new gregoriancalendar();
hourtemp=currentstate>0?(currentstate-8):(currentstate-1);
hour = calendar.get(calendar.hour)+hourtemp;
minute = calendar.get(calendar.minute);
second = calendar.get(calendar.second);
a_sec = second * 2 * math.pi / 60;
a_min = minute * 2 * math.pi / 60 + a_sec / 60;
a_hour = hour * 2 * math.pi / 12 + a_min / 12;
// 计算时、分、秒针的末端位置
xsecond=320+(int)(110*math.sin(a_sec));
ysecond=240-(int)(110*math.cos(a_sec));
xminute=320+(int)(90 *math.sin(a_min));
yminute=240-(int)(90 *math.cos(a_min));
xhour= 320+(int)(70 *math.sin(a_hour));
yhour= 240-(int)(70 *math.cos(a_hour));
xsecond1=320-(int)(22*math.sin(a_sec));
ysecond1=240+(int)(22*math.cos(a_sec));
xminute1=320-(int)(15*math.sin(a_min));
yminute1=240+(int)(15*math.cos(a_min));
xhour1 =320-(int)(5 *math.sin(a_hour));
yhour1 =240+(int)(5 *math.cos(a_hour));
repaint();
}
}
}
//
//clock.java
import javax.swing.*;
public class clock{
public static void main(string[] args) {
jframe frame=new jframe("clock"); //创建图文框
frame.setdefaultcloseoperation(jframe.exit_on_close);
frame.getcontentpane().add(new clockpanel()); //添加面板
frame.setvisible(true);
frame.setsize(640,480);
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
