问下各位高手。我写的这个小程序。为什么显示的时间跟我电脑上的时间不一样呢。时间差很多。。求解答。谢谢各。。
package hoemwork05;import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.swing.JFrame;public class TestHome05 { public static void main(String args[]) throws IOException { Date date = new Date();
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String str = df.format(date);
System.out.println(df.format(new Date())); JFrame jframe = new JFrame();
jframe.setTitle(str);
jframe.setBounds(100, 100, 200, 200);
jframe.setVisible(true);
}
}
package hoemwork05;import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.swing.JFrame;public class TestHome05 { public static void main(String args[]) throws IOException { Date date = new Date();
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String str = df.format(date);
System.out.println(df.format(new Date())); JFrame jframe = new JFrame();
jframe.setTitle(str);
jframe.setBounds(100, 100, 200, 200);
jframe.setVisible(true);
}
}
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String str = df.format(date);
System.out.println(df.format(new Date()));这段没什么问题啊 取的就是电脑时间
TimeZone tz = TimeZone.getTimeZone("Asia/Shanghai");
TimeZone.setDefault(tz);
// 获得的formatter
DateFormat formatter = DateFormat.getDateTimeInstance();
TimeZone timezone = TimeZone.getTimeZone("Asia/Tokyo");
//设置DateFormat的时区 formatter.setTimeZone(timezone);
// 获得格式化后的时间
String dateTime = formatter.format(new Date());
System.out.println(dateTime);
Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("Japan"));
System.out.println(calendar.get(calendar.YEAR));
// calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH),
// calendar.get(calendar.HOUR_OF_DAY), calendar.get(calendar.MINUTE));
Date date = new Date(calendar.get(Calendar.YEAR) - 1900, calendar.get(Calendar.MONTH),
calendar.get(Calendar.DAY_OF_MONTH), calendar.get(calendar.HOUR_OF_DAY),
calendar.get(calendar.MINUTE));
public static final String YYYMMDD="yyyy-MM-dd HH:mm:ss";
Thread time;
JTextField t1,t2,t3;
public static void main(String[] args) {
DateTest r=new DateTest();
}
//构造
public DateTest(){
JPanel p=new JPanel();
t1=new JTextField(2);
t2=new JTextField(2);
t3=new JTextField(2);
JLabel timelbl=new JLabel("显示当前实列");
JLabel nowtimelbl=new JLabel("当前时间");
p.add(nowtimelbl);
Date newdate=new Date();
/*格式化时间*/
SimpleDateFormat sfl=new SimpleDateFormat(YYYMMDD);
/*将格式化后年月日放入到表示时间的标签*/
JLabel ymdLbl=new JLabel(sfl.format(newdate));
p.add(ymdLbl);
this.setTitle("钟哥的杰作");
this.add("North",timelbl);
this.add("Center",p);
this.setBounds(400,200,500,300);
this.setVisible(true);
}