问题描述
importjava.awt.Font.*;importjava.text.SimpleDateFormat;importjava.util.*;importjavax.swing.*;publicclassnowTimeAppletextendsJAppletimplementsRunnable{publicstaticfinalStringYYYMMDD="yyyy/MM/dd";//定义表示格式化时间的常量Threadtime;JTextFieldtxfNowHour;JTextFieldtxfNowMinute;JTextFieldtxfNowSecond;publicvoidinit(){JPanelpanelTime=newJPanel();//创建表示时间的面板txfNowHour=newJTextField(2);//创建表示小时的文本框txfNowMinute=newJTextField(2);//创建表示分钟的文本框txfNowSecond=newJTextField(2);//创建表示秒钟的文本框JLabeltimeLbl=newJLabel("显示当前时间实例");timeLbl.setFont(newFont("time",Font.BOLD,20));[/color]JLabelnowTimeLbl=newJLabel("当前时间:");nowTimeLbl.setFont(newFont("Dialog",Font.PLAN,20));[/color]panelTime.add(nowTimeLbl);DatenowDate=newDate();/*格式化时间*/SimpleDateFormatsfl=newSimpleDateFormat(YYYMMDD);/*将格式化后年月日放入到表示时间的标签*/JLabelymdLbl=newJLabel(sfl.format(nowDate));panelTime.add(ymdLbl);panelTime.add(txfNowHour);panelTime.add(newJLabel("时"));panelTime.add(txfNowMinute);panelTime.add(newJLabel("分"));panelTime.add(txfNowSecond);panelTime.add(newJLabel("秒"));add("North",timeLbl);add("Center",panelTime);setBounds(400,200,500,300);setVisible(true);}/*线程启动方式*/publicvoidstart(){time=newThread(this);time.start();}/*线程运行方式*/publicvoidrun(){while(time!=null){try{time.sleep(1000);}catch(InterruptedExceptionex){}runTime();}}/*时间运行方式*/privatevoidrunTime(){Calendarnow=newGregorianCalendar();inthour=now.get(Calendar.HOUR_OF_DAY);intminute=now.get(Calendar.MINUTE);intsecond=now.get(Calendar.SECOND);txfNowHour.setText(Integer.toString(minute));txfNowSecond.setText(Integer.toString(second));}publicstaticvoidmain(Stringargs[]){nowTimeAppletjapplet=newnowTimeApplet();japplet.init();}}
解决方案
解决方案二：
privatevoidrunTime(){Calendarnow=newGregorianCalendar();inthour=now.get(Calendar.HOUR_OF_DAY);intminute=now.get(Calendar.MINUTE);intsecond=now.get(Calendar.SECOND);txfNowHour.setText(Integer.toString(minute));txfNowSecond.setText(Integer.toString(second));}这里错了，/*时间运行方式*/privatevoidrunTime(){Calendarnow=newGregorianCalendar();inthour=now.get(Calendar.HOUR_OF_DAY);intminute=now.get(Calendar.MINUTE);intsecond=now.get(Calendar.SECOND);txfNowHour.setText(Integer.toString(hour));txfNowMinute.setText(Integer.toString(minute));txfNowSecond.setText(Integer.toString(second));}
解决方案三：
Thanks!